GENERAL INFORMATION Locking is the rigid coupling of two or more elements which, in the absence of a coupling device, would otherwise be free to rotat

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GENERAL INFORMATION Locking is the rigid coupling of two or more elements which, in the absence of a coupling device, would otherwise be free to rotate or effect an axial movement. Statistically locking is typical of the connection between a shaft with a cylindrical section and hubs of various shapes and types, like for example a gear wheels, pulleys, cams and various levers. Locking is therefore used in a whole series of kinematic chains that have been designed for the transmission of mechanical power. Numerous locking methods are available, each more sophisticated than the last as the power transmitted using the couplings increased as the accuracy of the tools used to produce them improved. The systems in most widespread use today are without doubt those based on the use of keys, tabs and pins, due of their design and construction simplicity. For specific requirements use is also made of systems based on splined profiles, tapered shafts and hubs and other various combinations. Notwithstanding the advance of technology, the system that still remains unsurpassed is that known as shrinking on, as it unites the precision of the transmission of motion with the high power that can be transmitted by a friction coupling. Despite this their use is not very widespread as it is still today the system that is most difficult to manufacture as particular care must be taken in the design and production stages. MAV Locking Devices are the result of a study of the advantages offered by this system which retains the high quality of the coupling, facilitates the design stage and contributes to the lowering of manufacturing costs due to the vast range of types and standard sizes available. Most requirements can today be satisfied by the use of MAV Locking Devices, but where particular requirements must be satisfied, MAV SpA is ready to support the designer with special locking device systems. 1-KEY 2-TANG 3-WOODRUFFKEY 4-TANGENTIALKEY 5-TAPERED PIN 6-SPLINES EXAMPLES OF TRADITIONAL COUPLING SYSTEMS operates on the head and therefore requires particularly precise and expensive adjustment. It has the tendency to cause irregularity in the hub. operates on the sides and is normally machine produced and is less expensive, but because of its lower precision it easily becomes loose causing noise and possible shearing. difficult to manufacture, used where it is necessary to eliminate play and where used for kinematic couplings it is subject to vibrations. transmits high kinematic torque subject to impacts and movement inversions. It is expensive and complicated to manufacture. not easy to assemble and dismantle. It is used where the torques produced are not very high and where axial forces may be present. expensive, suitable where frequent fitting and dismantling takes place or where axial movement must be left free. The traditional systems above listed all have in common the disadvantage that there is a contact between the shaft and hub that is not able to transmit motion on its own. It is therefore necessary to use an intervening element which requires further work to make the housing for the element, and consequently higher costs. Examples of traditional coupling systems. - 1 - - 2 - - 3 - - 4 - - 5 - - 6 - - 4 -

COUPLING USING TRADITIONAL SYSTEMS In the majority of cases manufacturing costs are high because the various parts must undergo several machine processes (turning, milling, slotting, grinding, etc.) with a consequent increase in accessory time and movement between machines which increase production times. The parts to be coupled must often be assembled with adjustment operations and the use of highly specialized labour. ASSEMBLY DISMANTLING PLAY BREAKAGE Normally assembly is not difficult, provided that there is no need for preset angular or longitudinal timing between the transmission elements, for example in the case of cams. In this case the precision of the work must be excellent and often the costs make themselves felt. Often this operation is complex, mainly due to the seizure or oxidization of the contact surfaces, and requires special tools that are not always readily available or are difficult to use in certain situations. It is unusual for the coupling to be completely free of play, and also in this case, in time, impacts or alternating motion could prejudice operational safety. The presence of slots in the shaft and hub could trigger fatigue failure, especially if the coupling is subject to variable forces. These are normally difficult to predict and often lead to the over sizing of components. COUPLING USING MAV LOCKING DEVICES CALCULATION TIMING PROCESSING ASSEMBLY DISMANTLING PLAY Calculations for the coupling are simplified by the use of the values indicated in tables. These do not require any further elaboration because the data indicated is calculated with sufficient safety margins. It is normally enough to know with accuracy what maximum torque or axial thrust values the locking device will be subject, especially in the case of large masses in movement where high inertial kinetic energy values are generated. Locking devices do not require any timing operations and allow the maximum freedom and flexibility in the timing of the kinematic chain. One of the essential characteristics of locking devices is that all the intermediate processing stages are eliminated as normally only turning operations are required which respect tolerances from H7/ h7 to H11/h11. Surface finishing is that which can normally be achieved with good turning operations and grinding is only recommended in the rare cases where fatigue failure is a possibility. The possibility of using high processing tolerances and the absence of an adjustment stage means that assembly is very simple. Locking devices only require that the screws are tightened correctly using a torque wrench. No special tools are required as the locking device, after it has been dismantled using the extraction holes where the same screws used for mounting are inserted, frees the hub and shaft. The pressures generated when the locking device is fitted are enough to guarantee against the occurrence of rusting at the point of contact. During the assembly phase play is eliminated automatically, in both a radial and longitudinal sense and any tolerance errors in the turning of the shaft and hub are also recovered. BREAKAGE The absence of slots in the shaft and hub are a guarantee of the greater durability of the coupling with regards to fatigue failure. The sizing of the elements takes into consideration the pressures that act upon the shaft - coupling and hub - coupling interface. These often reach high values which, in rare cases, may require the use of special materials. Although MAV Locking Devices have an higher unit compared to traditional coupling systems, they eliminate the main defects. Their use allows a number of savings which can be summed up as follow: reduced calculation time for the technical office reduction in processing time due to the lower number of machining operations required reduced use of raw and semi-processed materials reduction in the cost of storage with the use of unified components longer longlife and precision of the coupling. Designers should take these elements into consideration during the study of the application, even if at first sight this might also mean a radical change in way one thinks of and sees the coupling. The use of MAV LOCKING DEVICES requires a "dynamic" approach to design, which might be encouraged by a good knowledge of this type of locking device. MAV, with almost fifteen years of experience, is available to anyone who would like to learn more about these concepts or those who require more detailed information than those contained in this catalogue. The company s design and calculation computer systems are also available. - 5 -

- 6 - CALCULATIONS AND VERIFICATIONS To choose the most suitable locking device for each application, the designer can make use of the following calculations. USE PARAMETERS The exact calculation of the power to be transmitted and the type of elements in the kinematic chain (e.g. helical or spur gears ) gives an indication of the transmissible torque (Mt) and the possible axial force (Fax) to be transmitted. The size of the shaft mainly depends on these values, as well as any standardization requirements. The formula commonly used to determine the diameter of a solid shaft (d) subject only to transmissible torque is the following: N 9549 N 7023 1) Mt t = 2) Mt t = n n where: Mt t = theoretical transmissible torque (Nm) - N = power expressed in kw in 1) and in Hp in 2) - n = rpm Mt 3 t 5093 3) d = k t where: d = shaft diameter (mm) - k t = unit safety load (N/mm 2 ) LOCKING DEVICE SELECTION The diameter of the shaft and the value of transmissible torque is calculated using the following formula: 2 2 d 4) Mt c = Mtt + Fax t 2000 where: Mt c = composite transmissible torque (Nm). With Fax t = 0, Mt c = Mt t Fax t = theoretical axial force (N) d = shaft diameter (mm) Once the calculation has been made one proceeds with the choice of the type of locking device required, on the basis the (Mt c ) values lower or equal to the (Mt) values in the catalogue, and also on the basis of any requirements like concentricity, perpendicularity, absence of axial movement etc. To facilitate this choice the table at page no. 3 indicates the main characteristics of MAV locking devices. HUB VERIFICATION After choosing the locking device it is necessary to check the minimum external diameter (Dem) of the hub which must be able to withstand the stresses caused by the high pressures generated by the locking device. Obviously this verification is purely static and only concerns the stresses generated by the locking device. Table at page no.8 has been produced using the following formula which gives the relationship between the external hub diameter (Dem) and internal diameter (D) on the basis of various specific pressures (Pm), the values of the utilisation coefficient (C) and the various yield strength values (Rs 0,2 ) of several types of commonly used materials. Rs0,2+ Pm C 5) Dem D Rs 0,2 Pm C where: Dem = external hub diameter (mm) - Rs 0,2 = Yield strength for a permanent elongation of 0,2% (N/mm 2 ) - Pm = specific pressure on hub (N/mm 2 ) The value of tangential stress (s te ) on the external diameter (Dem) of the hub is calculated using: 2 Q D 6) σ te = 2 Pm 7) Q = 1 Q Dem where: s te = unitary tangential stress on the external diameter (N/mm 2 ) The elastic deformation of the hub is calculated according to: D Q 8) ΔDem = 2 Pm E 1 Q where: DDem= hub deformation (mm) - E = modulus of elasticity (for 206 000 steel N/mm 2 ) CALCULATION OF TRANSMISSIBLE TORQUE OF AN ELEMENT LOCKED ON TO THE HUB When the locking device is used to lock an element positioned outside the hub the final transmissible torque depends on the residual pressure in the hub - element interface. This pressure is actually the difference between the pressure developed by the locking device on the hub and that absorbed by the resistance of the hub itself during the deformation necessary to take up the play determined by the tolerances used between hub and the external element. The value can be calculated using the following formula: Clm 1 Q 9) Pdm = E 10) ΔPme = Pm Pdm 2 D Q where: Pd m = pressure for hub deformation (N/mm 2 ) - Cl m = play between hub and drive element (mm) - DPm e = residual pressure (N/mm 2 )

This value is used to calculate the pressure than can be used and the transmissible torque to it related. The following formulas are valid where the modulus of elasticity (E) of the material of locked element and the hub are the same: 2 2 Q t Do D 11) Pu = ΔPme 1 12) Q 2 t 1 Q t Dem = Do Nem Dem μ 13) N em = Pu Dem π H1 14) Mt em = 2 1000 where: Pu = usable pressure (N/mm 2 ) Do = usable external diameter of the locked element (mm) Dem = external hub diameter (mm) D = external locking device diameter (mm) Mt em = transmissible torque from the locked element on to the hub (Nm) N em = radial force m = friction coefficient (0,12 for steel on steel with lubrication) H1 = width of locking device - hub contact face (mm) It is clear that the final transmissible torque depends mostly on the type of materials used to construct the hub and locked element (and as a consequence on the relative modulus of elasticity and friction coefficient) as well as on the play in the coupling and the thickness of the hub. It is therefore task of the designer to find an organic relationship between these values and apply a suitable safety coefficient. If these configurations are used the contemporaneous use of a hollow shaft is inadvisable. HOLLOW SHAFT VERIFICATION If the locking device is used in a configuration with a hollow shaft, the characteristics of the shaft are verified using the following formulas: Rs0,2 2 Pa C 2 Pa 15) d ia d 16) σti = Rs 0,2 1 Q where: d ia = the internal diameter of the hollow shaft (mm) d = the external diameter of the hollow shaft (mm) Pa = the pressure on the external diameter of the shaft (N/mm 2 ) s ti = unitary tangential stress on the internal diameter of the hollow shaft (N/mm 2 ) 2 dia 17) Q = 2 Pa d 18) Δdia = d E ( 1 Q ) where: Dd ia = the deformation of the hollow shaft (mm) CALCULATION OF TRANSMISSIBLE TORQUE FROM A LOCKED SHAFT IN A HOLLOW SHAFT Obviously it is possible to use the residual pressure inside a hollow shaft to lock another drive shaft, in order to obtain torque transmission between three elements. As in the previous case the transmissible torque depends on play,on the thickness of the hollow shaft and on the materials used and their friction coefficient; the transmissible torque is calculated using the following formulas: Cla 19) Pd a = E ( 1 Q) 20) ΔPa1 = Pa Pda 2 d Nia dia μ 21) Nia = ΔPa1 dia π H1 22) Mtia = 2 1000 with: Pd a = pressure for the deformation of the hollow shaft (N/mm 2 ) DPa 1 = usable residual pressure (N/mm 2 ) Mt ia = transmissible torque from the drive shaft (Nm) N ia = radial force (N) H1 = the width of the locking device - shaft contact face (mm) The values of the deformations of the shaft and hub placed under the very high pressures generated by the locking device, demonstrate the need of a careful analysis about the position of any bearings in order to avoid undesired and dangerous preloading. It is also important to verify that the values of the tangential stress (s ti and s te ), as well as those of the specific pressures (Pm) and (Pa) are not higher than the value of (Rs 0,2 ) for the materials used for the shaft and hub. If this should occur it is necessary to select a locking device that is longer so that the pressures generated are lower. EXAMPLE Please note that there is no need to increase the diameter of the shaft, something that is necessary if the usual locking systems are used due to the presence of slots. This fact is of particular importance due to the large savings that can be made in raw materials, especially with regards to larger diameters. Purely as an example let us suppose that we need to transmit a power of 100 kw at 600 rpm, the diameter of the torque verified shaft is: 100 9549 1590 5093 ) Mt 1590Nm 24) d 3 t = = = 43,27mm 600 100 with a safety yield point of 100 N/mm 2. We can select a MAV 1061 x 75, locking device, which transmits a torque of 1620Nm, with a shaft that has a diameter of mm and a total coupling length of 42 mm. If a key system was used the table shows that the recommended size would be 14 mm in width and 9 mm in height. continue to page no.9-7 -

HOW TO CALCULATE THE MINIMUM OUTER DIAMETER OF THE HUB The following table is useful to the designer to quickly calculate the external hub diameter (Dem) on the basis of different yield strength values (Rs 0,2 ), different values of specific pressure on the hub (Pm) and the utilization coefficient (C). The values shown are equivalent to the (Dem/D) relationship. For values greater than 2,5 it is considered more economic to change the series of locking device or type of material used for the hub. Dem / D Yield point Rs 0,2 of the material of which the hub is made Pm C 140 160 180 200 220 240 260 280 300 320 340 360 380 400 420 440 460 480 500 1,00 2,45 2,08 1,87 1,73 1,63 1,56 1,50 1,45 1,41 1,38 1,35 1,33 1,31 1,29 1,27 1,26 1,25 1,24 1,22 100 0,80 1,91 1,73 1,61 1,53 1,46 1,41 1,37 1,34 1,31 1,29 1,27 1,25 1,24 1,22 1,21 1,20 1,19 1,18 1,18 0,60 1,58 1,48 1,41 1,36 1,32 1,29 1,26 1,24 1,22 1,21 1,20 1,18 1,17 1,16 1,15 1,15 1,14 1,13 1,13 1,00 2,32 2,04 1,86 1,73 1,64 1,57 1,51 1,47 1,43 1,40 1,37 1,35 1,33 1,31 1,29 1,28 1,26 1,25 110 0,80 2,09 1,86 1,71 1,60 1,53 1,47 1,42 1,38 1,35 1,33 1,30 1,28 1,27 1,25 1,24 1,22 1,21 1,20 1,19 0,60 1,67 1,55 1,47 1,41 1,36 1,33 1,30 1,27 1,25 1,23 1,22 1,20 1,19 1,18 1,17 1,16 1,16 1,15 1,14 1,00 2,24 2,00 1,84 1,73 1,65 1,58 1,53 1,48 1,45 1,41 1,39 1,36 1,34 1,32 1,31 1,29 1,28 120 0,80 2,32 2,00 1,81 1,69 1,60 1,53 1,47 1,43 1,39 1,36 1,34 1,31 1,29 1,28 1,26 1,25 1,24 1,22 1,21 0,60 1,77 1,62 1,53 1,46 1,40 1,36 1,33 1,30 1,28 1,26 1,24 1,22 1,21 1,20 1,19 1,18 1,17 1,16 1,16 1,00 2,49 2,17 1,97 1,83 1,73 1,65 1,59 1,54 1,50 1,46 1,43 1,40 1,38 1,36 1,34 1,32 1,30 130 0,80 2,17 1,93 1,78 1,67 1,59 1,53 1,48 1,44 1,40 1,37 1,35 1,32 1,30 1,29 1,27 1,26 1,25 1,24 0,60 1,88 1,70 1,59 1,51 1,45 1,40 1,36 1,33 1,30 1,28 1,26 1,25 1,23 1,22 1,21 1,20 1,19 1,18 1,17 1,00 2,38 2,12 1,95 1,83 1,73 1,66 1,60 1,55 1,51 1,47 1,44 1,41 1,39 1,37 1,35 1,33 140 0,80 2,38 2,07 1,88 1,75 1,66 1,59 1,53 1,48 1,44 1,41 1,38 1,35 1,33 1,31 1,30 1,28 1,27 1,26 0,60 2,00 1,79 1,66 1,56 1,50 1,44 1,40 1,36 1,33 1,31 1,29 1,27 1,25 1,24 1,22 1,21 1,20 1,19 1,18 1,00 2,30 2,08 1,93 1,82 1,73 1,66 1,61 1,56 1,52 1,48 1,45 1,43 1,40 1,38 1,36 150 0,80 2,24 2,00 1,84 1,73 1,65 1,58 1,53 1,48 1,45 1,41 1,39 1,36 1,34 1,32 1,31 1,29 1,28 0,60 2,14 1,89 1,73 1,62 1,54 1,48 1,43 1,40 1,36 1,34 1,31 1,29 1,27 1,26 1,24 1,23 1,22 1,21 1,20 1,00 2,52 2,24 2,05 1,91 1,81 1,73 1,67 1,61 1,57 1,53 1,49 1,46 1,44 1,41 1,39 160 0,80 2,43 2,13 1,94 1,81 1,71 1,64 1,58 1,53 1,49 1,45 1,42 1,39 1,37 1,35 1,33 1,31 1,30 0,60 2,32 2,00 1,81 1,69 1,60 1,53 1,47 1,43 1,39 1,36 1,34 1,31 1,29 1,28 1,26 1,25 1,24 1,22 1,21 1,00 2,42 2,19 2,02 1,90 1,81 1,73 1,67 1,62 1,57 1,54 1,50 1,47 1,45 1,42 170 0,80 2,29 2,06 1,90 1,79 1,70 1,63 1,57 1,53 1,49 1,45 1,42 1,40 1,38 1,36 1,34 1,32 0,60 2,13 1,90 1,76 1,65 1,57 1,51 1,46 1,42 1,39 1,36 1,34 1,32 1,30 1,28 1,27 1,25 1,24 1,23 1,00 2,35 2,14 2,00 1,89 1,80 1,73 1,67 1,62 1,58 1,54 1,51 1,48 1,46 180 0,80 2,48 2,19 2,00 1,87 1,77 1,69 1,62 1,57 1,53 1,49 1,46 1,43 1,40 1,38 1,36 1,34 0,60 2,27 2,00 1,83 1,71 1,62 1,56 1,50 1,46 1,42 1,39 1,36 1,34 1,32 1,30 1,28 1,27 1,26 1,25 1,00 2,54 2,29 2,11 1,98 1,88 1,80 1,73 1,68 1,63 1,59 1,55 1,52 1,49 190 0,80 2,34 2,11 1,95 1,84 1,75 1,68 1,62 1,57 1,53 1,49 1,46 1,43 1,41 1,39 1,37 0,60 2,44 2,11 1,91 1,78 1,68 1,60 1,54 1,49 1,45 1,42 1,39 1,36 1,34 1,32 1,30 1,29 1,27 1,26 1,00 2,45 2,24 2,08 1,96 1,87 1,80 1,73 1,68 1,63 1,59 1,56 1,53 200 0,80 2,52 2,24 2,05 1,91 1,81 1,73 1,67 1,61 1,57 1,53 1,49 1,46 1,44 1,41 1,39 0,60 2,24 2,00 1,84 1,73 1,65 1,58 1,53 1,48 1,45 1,41 1,39 1,36 1,34 1,32 1,31 1,29 1,28 This chart shows the values and characteristics taken for the mentioned formulas. The utilization coefficient (C) values are valid for all locking devices. Should the designer need to use hubs that are different from those shown, he or she must take account of the most similar form and worst case conditions. DDem/2 L 1 = L L 1 = 2L L 1 > 2L Pm Pa L L L - 8 - Dd ia /2 d ia d D Dem C = 1 C = 0,8 C = 0,6

continue from page no.7 This would take the diameter of the shaft, including the material of the key slot, to 49 mm, while the length of the key would be about 53 mm. It is therefore possible to suppose that the coupling width would be about 60 mm. In the first case the shaft material weighs about 0,5 kg while in the second case it is about 0,9 kg. The savings in terms of cost and the volume of the rotating mass, without forgetting the concentricity characteristics, definitely favour locking device coupling. To calculate the internal diameter of a hollow shaft, the designer must use, in the relative formula, a utilisation coefficient value(c) of 0,8, which is valid for most cases, i.e. for a shaft length equal to or greater than twice the width of the internal ring of the locking device in the area under pressure (Pa). In other cases it is recommended that the value 1 be used. The use of hollow shafts with shrink disks is becoming ever more widespread, especially in costly applications. A good example of this is that of speed reducers where the coupling is provided by shrink disks. Due the combination of hollow shaft and shrink disk it is possible to lock a drive shaft and external hub contemporaneously, thereby eliminating the rigid joints that were once necessary, therefore providing great savings in space and weight of the assembled units. FURTHER ELEMENTS FOR CALCULATION OF LOCKING DEVICE CHARACTERISTICS 8.8 10.9 12.9 As we have already seen, all the characteristics of locking devices ( Mt - Fax - Pa - Pm) are directly proportional to the Ma Fv Ma Fv Ma Fv sum of the force expressed by each screw (Fv) and the M 4 3 3 900 4 5 400 5 6 400 friction coefficient (m) that results between the various parts M 5 6 6 300 8 8 400 10 10 600 in contact. In the case of assemblies subject to special M 6 10 8 900 14 12 400 17 15 100 M 8 25 17 000 35 800 41 27 900 conditions, for instance in the presence of thin walled hubs and torque values lower M 10 49 27 000 69 38 100 83 800 than the maximum transmissible, it could be necessary to reduce the locking torque M 86 40 500 120 600 145 68 400 of the screws (Ma) in order to reduce the pressure generated by the locking device M 14 135 54 800 190 77 100 230 93 300 (Pa and Pm) and at the same time the transmissible torque. The first fundamental M 16 210 75 600 295 106 000 355 128 000 value for the following calculation is the force generated by each screw (Fv) of the M 18 290 92 100 405 129 000 485 154 000 type DIN 912 tightened to a certain torque value: the beside table lists these values M 20 410 118 000 580 167 000 690 199 000 according to the screw class ( 8.8-10.9-12.9). The calculations are based on a M 22 550 146 000 780 206 000 930 246 000 friction coefficient for slightly oiled screws equal to about m M 24 710 171 000 1000 241 000 1200 289 000 v» 0,14. M 27 1 050 228 000 1500 326 000 1800 391 000 M 30 1 450 282 000 2000 388 000 2400 466 000 As mentioned in other parts of this catalogue too, the friction coefficient used is m = 0,12 which corresponds to the condition of a contact between steel and steel with light lubrication, while in the case of dry assembly a higher value should be used, m = 0,15. In reality, the friction generated by a locking device after assembly is much higher (from 1,5 to 3 times greater) as the starting friction must be considered. Due to this a safety factor is automatically included in the calculation. However, due to the great difference in parameters relative to each application (factors of form, vibration, utilisation coefficient, overloading etc.), it is not possible to establish these factors beforehand, therefore the calculations do not take them into account. FITTING SEVERAL UNITS ARRANGED ONE BEHIND THE OTHER no. of units In applications where several units are fitted one behind the other (n), where access to the locking screws is only Series possible from one part, the total transmissible torque (Mt t ) is not an integral multiple of the units used. The total 2 3 4 value should be reduced by a factor of (f RS ) according to the chart on the left, using the formula: 2005 1062 6902 0,80 0,75 0,70 3003 0,77 0,62 0,50 Mt t = n x Mt x f RS 1008 0,80 0,75-4061 0,85 - - ROTATIONAL BENDING MOMENT This is a crucial factor for sizing the parts when a radial load caused by pulleys, gear wheels or the weight of 4061 = 35% components etc., is applied completely outside the centre line of the locking device. A typical case is that of conveyor belt drums where the traction force of the belt causes a bending moment between the shaft, locking 1008 = 32% device and drum base. In practise this bending moment acquires in succession a negative and positive value with 6901-6902 = 29% each rotation and for this reason it is designated "rotational bending". MAV locking devices are an excellent 1061-1062 - 5061-6903 = 28% choice to solve this problem correctly. On the basis of many heavy duty applications on highly stressed drums 2005 = 22% and studies carried out by independent institutions, we have determined the admissible bending moment percentage in respect to the transmissible torque in the catalogue. RADIAL LOAD CENTERED ON THE LOCKING ASSEMBLY This type of load, which is generally found in pins, axles or other similar connections, generates pressure that can be expressed as the relationship between the load itself and the area of the shaft affected the locking device. This pressure is added up and then subtracted from the pressure (Pa). For correct sizing, therefore, the resulting value of (Pa) must never be lower than or equal to zero, or be greater than the yield strength of the materials used. CONCLUSIONS In recent times there has been a large number of new types of application in very different fields, due to a different approach to the study of power transmission based on the widespread use of locking assemblies. Therefore the designer should not just consider locking devices to be just an alternative to the usual coupling systems, but as an element on which to base a more modern construction concept, with evident cost savings. The need for production and storage cost reduction has caused companies to bring their design philosophies up to date, through the use of standardised or pre-assembled components and the exploitation of modern machine tools. We firmly believe that locking devices are well suited to this type of philosophy, and are frequently used as the starting point for a complete re-examination of a large part of manufacturing systems. In conclusion it must be mentioned that the substitution or elimination of certain processes, like for example various types of welding, can also have a positive effect on environmental pollution control or reduction, a factor which all modern companies should take into account. screw - 9 -

MAV 4061 series self centering very high transmissible torques MAV 1008 series self centering high transmissible torques T SECTION CLAMPING DEVICES This family of devices represents the high top of MAV range: the transmissible torques, in relation to diameter size, are among the highest along with maximum coupling precision. These devices consist of a set of screws one front cone, one rear cone and an outer ring made of one piece only with an internal rear traction ring. The front cones have three sets of holes: one set is threaded and the other two are smooth sided. The former holes are used during assembly to stop the internal ring from moving, and during removal, where the screws on the flange of the outer ring act as extractors. The second set of holes are those through which the tightening screws pass and are recognizable because the first and last are closest to the cut. In correspondence to the holes there are other smooth sided ones in the flange of the outer ring and threaded holes in the internal rear traction ring. The third set is also made up of smooth sided holes which in this case are threaded in correspondence to the flange of the external ring: during assembly these are used to insert several screws to hold the rings in position and, during removal, to push and free the rear cone. These locking devices have been designed so that it is not necessary to use different tools during assembly and removal operations. The same screws are used and the rings also act as extractors. The only tool needed is an appropriately sized torque wrench. The utilization characteristics (transmissible torque and transmissible axial force) are in fact directly proportional to the sum of the pull of the screws and, as a consequence, the tightening torque (Ma). Therefore great care should be taken while tightening these screws in a crosswise pattern. Incorrect assembly or insufficient screw tightening could cause the coupling to slip under load with the consequent seizure of the locking device. Installation and removal instruction... page no.11 Samples of assembling...page no.13

INSTALLATION and REMOVAL instructions 1008 & 4061 series INSTALLATION Locking assemblies are supplied ready for installation. However, if for some reason they have to be disassembled, make sure that in addition to lined-up slits in all collars, near and far-side clamp collars are not reversed. They are assembled correctly only if there are no holes or threads behind taps in clamp collar item [2]. Likewise, there must be no threads behind taps in center collar item [3] as illustrated in fig. 1-2-3. The frictional torque capacity of these devices is based on a coefficient of friction of μ=0,12 for slightly oiled screws, taper, or shaft and bore contact areas. 1 - Make sure shaft and bore contact areas are clean and slightly oiled. 2 - Loosen all screws by minimum 2 turns and transfer at least 2 screws to push off threads in clamp collar item [2] and center collar item [3] in order to disengage tapers for easy installation of locking assembly (see fig. 1). 3 - After installation of locking assembly, relocate locking screws used for separation of collars. Locking Devices MAV4061 - MAV1008 Metric Sizes Inch Sizes Screws DIN 912 class 12.9 Torque Ma (Nm) 24x 55to 35x 60 1 to1-7/16 M 6 17 45 x 75 to 65 x 95 1-1/2 to2-9/16 M 8 41 70 x 110 to 90 x 130 2-5/8 to 3-5/8 M 10 83 100 x 145 to 120 x 165 3-3/4 to 4-3/4 M 12 145 130 x 180 to 160 x 210 4-15/16 to 6 M 14 230 170 x 235 to 260 x 325 6-1/2 to 8 M 16 355 280 x 355 to 340 x425 M 20 690 360 x 455 to 600 x695 M 22 930 1 3 2 4 Fig. 1 4 - Hand tighten connection and assure that collar item (2) is parallel with face of part to be attached to shaft. 5 - Use torque wrench and set it approximately 5% higher than specified tightening (Ma). Torque screws in either a clockwise or counter clockwise sequence, using only 1/4 turns (it is not necessary to tighten in a diametric pattern) for several passes until 1/4 turns can no longer be achieved. 6 - Still apply overtorque for 1 to 2 more passes. This is required to compensate for a system-related relaxation of locking screws since tightening of a given screw will always relax adjacent screws. Without overtorquing an infinite number of passes would be needed to reach specified tightening torque. 7 - Reset torque wrench to specified torque and check all locking screws. No screw should turn at this point, otherwise repeat step "6" for one or more times. It is not necessary to recheck tightening torque after equipment has been in operation. NOTE: For installations subjected to extreme corrosion, the slits in clamp collars item [2] and [4] as well as in center collar item [3] should be sealed with a suitable caulking compound or otherwise. REMOVAL ( refer to Fig. 2 and Fig. 3 ) IMPORTANT! Make sure ends of locking screws used for removal are ground flat and ends are slightly chamfered to eliminate damage to screw and collar threads during push-off. A - Check to assure that axial movement of clamp collars necessary for release of connection is not restricted. B - Remove all locking screws and trasfer some into all push-off threads in clamp collar item no.[2]. C - Release collar no. [2] by progressively tightening all push-off screws. Typically, the push-off screws appear to be completely tight after just one pass of tightening without any noticeable separation. Although it seems that screws can not be tightened further, several more rounds of torquing in a clockwise (or counter clockwise) sequence actually more push-off force to the system and ultimately release part of the front collar. Afterwards, only the screws which are still tight, should be tightened further until complete dismountling is achieved. D - Transfer locking screws used for dismounting of collar no.[2] to all pushoff threads in center collar item no.[3]. Release collar no.[4] by repeating procedures outlined in step number 3. WARNING: it is important not to use Molybdenum Disulfide, e.g. Molykote, Never-Seeze or similar lubricants in any locking assembly installation. 1 3 1 3 2 4 4 Fig. 2-11 - Fig. 3

H3 H2 H1 SELF CENTRING VERY HIGH TORQUES Through cone Threaded cone Ø d Ø D class 12.9 DIN912 - UNI5931 4061-12 - H4 DIMENSIONS SCREWS SPECIFICATIONS d x D H1 H2 H3 H4 n. Size Ma Mt Fax Pa Pm 24 x 55 32 40 46 12 6 M 6 17 800 67 308 134 25 x 55 32 40 46 12 6 M 6 17 840 67 295 134 28 x 55 32 40 46 12 6 M 6 17 940 67 264 134 30 x 55 32 40 46 12 6 M 6 17 1 000 67 246 134 32 x 60 44 54 60 17 7 M 6 17 1 250 78 190 101 35 x 60 44 54 60 17 7 M 6 17 1 360 78 174 101 38 x 75 44 54 62 17 7 M 8 41 2 740 144 296 150 40 x 75 44 54 62 17 7 M 8 41 2 880 144 281 150 42 x 75 44 54 62 17 7 M 8 41 3 030 144 268 150 45 x 75 44 54 62 17 7 M 8 41 3 240 144 250 150 48 x 80 56 66 74 22 8 M 8 41 3 950 165 207 124 50 x 80 56 66 74 22 8 M 8 41 4 120 165 198 124 55 x 85 56 66 74 22 9 M 8 41 5 090 185 203 131 60 x 90 56 66 74 22 10 M 8 41 6 140 206 208 138 65 x 95 56 66 74 22 10 M 8 41 6 690 206 191 131 70 x 110 70 80 90 28 10 M 10 83 11 800 338 229 145 75 x 115 70 80 90 28 10 M 10 83 12 700 338 213 139 80 x 120 70 80 90 28 11 M 10 83 14 900 372 220 147 85 x 125 70 80 90 28 11 M 10 83 15 800 372 207 141 90 x 130 70 80 90 28 12 M 10 83 18 200 405 213 148 95 x 135 70 80 90 28 12 M 10 83 19 300 405 202 142 100 x 145 90 102 114 35 11 M 12 145 27 700 555 210 145 110 x 155 90 102 114 35 12 M 12 145 33 300 605 209 148 120 x 165 90 102 114 35 14 M 12 145 42 400 706 223 162 130 x 180 104 116 130 42 12 M 14 230 53 700 826 201 145 140 x 190 104 116 130 42 14 M 14 230 67 400 963 217 160 150 x 200 104 116 130 42 15 M 14 230 77 400 1 030 217 163 160 x 210 104 116 130 42 16 M 14 230 88 100 1 100 217 166 170 x 225 134 149 165 55 14 M 16 355 111 500 1 310 186 141 180 x 235 134 149 165 55 15 M 16 355 126 500 1 410 188 144 190 x 250 134 149 165 55 16 M 16 355 142 400 1 500 190 145 200 x 260 134 149 165 55 16 M 16 355 149 900 1 500 181 139 220 x 285 134 150 166 55 18 M 16 355 185 500 1 690 185 143 240 x 305 134 150 166 55 20 M 16 355 224 800 1 870 188 148 260 x 325 134 150 166 55 21 M 16 355 255 700 1 970 182 146 280 x 355 165 177 197 66 18 M 20 690 369 900 2 640 190 150 300 x 375 165 177 197 66 20 M 20 690 440 300 2 940 197 157 320 x 405 165 177 197 66 21 M 20 690 493 200 3 080 194 153 340 x 425 165 177 197 66 22 M 20 690 549 000 3 230 191 153 360 x 455 190 203 225 76 21 M 22 930 680 300 3 780 183 145 380 x 475 190 203 225 76 22 M 22 930 752 300 3 960 182 145 400 x 495 190 203 225 76 24 M 22 930 863 900 4 320 188 152 420 x 515 190 203 225 76 24 M 22 930 907 000 4 320 179 146 440 x 535 190 203 225 76 24 M 22 930 950 200 4 320 171 141 460 x 555 190 203 225 76 24 M 22 930 993 400 4 320 164 136 480 x 575 190 203 225 76 28 M 22 930 1 209 000 5 040 183 153 500 x 595 190 203 225 76 28 M 22 930 1 260 000 5 040 176 148 520 x 615 190 203 225 76 30 M 22 930 1 404 000 5 400 181 153 540 x 635 190 203 225 76 30 M 22 930 1 458 000 5 400 174 148 560 x 655 190 203 225 76 32 M 22 930 1 613 000 5 760 179 153 580 x 675 190 203 225 76 32 M 22 930 1 670 000 5 760 173 149 600 x 695 190 203 225 76 33 M 22 930 1 782 000 5 940 173 149 Outer "T" ring Ma screw tightening torque Nm Mt transmissible torque (with Fax = 0) Nm Fax axial force (with Mt = 0) kn Pa specific pressure on the shaft N/mm 2 Pm specific pressure on the hub N/mm 2 MAV4061 series is the high top product of MAV product range. Classical examples of application for this series MAV4061 are the locking of flywheels on mechanical presses, turbine rotors, and rolling mill cylinders. The fields of application of MAV1008 series are those where special requirements must be satisfied, with large masses in movement in particular environments. A typical example is the locking of large drums (see right-top sketch) for conveyor belts or rolling mills where use of this locking device is more advantageous in respect to others as it unites good transmissible power, small size and good resistance to rotational bending. MAV1008 series is offered where MAV4061 high performances are required but with lower torque values to be transmitted or as an alternative to traditional locking devices (of which it mantains same inner and outer diameters) or the use of several locking devices of other series (e.g. MAV 2005) coupled together. It is recommended that great care been taken with the assembly in order to take advantage of the characteristics offered by this product such as, concentricity, perpendicularity, the distribution of tangential forces, particular resistance to rotational bending when used with long shafts that are loaded at their ends. It is also recommended that care be taken during removal (see page no.11) of the locking device to clean and oil it, so that the timing of the rings is not changed which would later cause problems for the future removal of the device. ORDER EXAMPLE For a shaft d=70 mm, hub D=110 mm and a transmissible torque value lower than or equal to 11 800 Nm specify: LOCKING DEVICE MAV 4061 70 x 110 or For a shaft d=200mm, hub D=260 mm and a transmissible torque value lower than or equal to 104 700 Nm specify: LOCKING DEVICE MAV 1008 200 x 260

H3 H2 H1 SELF CENTRING HIGH TORQUES Through cone Threaded cone Ød ØD class 12.9 DIN912 - UNI5931 H4 DIMENSIONS SCREWS SPECIFICATIONS d x D H1 H2 H3 H4 n. Size Ma Mt Fax Pa Pm 70 x 110 50 62 72 20 8 M 10 83 7 280 208 197 125 75 x 115 50 62 72 20 8 M 10 83 7 800 208 184 120 80 x 120 50 62 72 20 10 M 10 83 10 400 260 216 144 85 x 125 50 62 72 20 10 M 10 83 11 100 260 203 138 90 x 130 50 62 72 20 11 M 10 83 12 900 286 211 146 95 x 135 50 62 72 20 11 M 10 83 13 600 286 200 141 100 x 145 60 72 84 24 10 M 12 145 19 400 388 215 148 110 x 155 60 72 84 24 10 M 12 145 21 400 388 195 138 120 x 165 60 72 84 24 11 M 12 145 25 600 427 197 143 130 x 180 65 82 94 27 14 M 12 145 35 300 544 205 148 140 x 190 65 82 94 27 15 M 12 145 40 800 582 204 151 150 x 200 65 82 94 27 15 M 12 145 43 700 582 191 143 160 x 210 65 82 94 27 16 M 12 145 49 700 621 191 145 170 x 225 78 93 107 32 15 M 14 230 67 500 795 194 146 180 x 235 78 93 107 32 15 M 14 230 71 500 795 183 140 190 x 250 88 105 119 38 16 M 14 230 80 500 848 156 118 200 x 260 88 105 119 38 18 M 14 230 95 300 950 166 128 220 x 285 96 111 127 41 15 M 16 355 119 000 1 080 159 123 240 x 305 96 111 127 41 20 M 16 355 173 000 1 440 194 153 260 x 325 96 111 127 41 21 M 16 355 196 800 1 510 188 151 280 x 355 96 111 131 38 15 M 20 690 237 300 1 690 211 167 300 x 375 96 111 131 38 15 M 20 690 254 200 1 690 197 158 320 x 405 124 136 156 48 20 M 20 690 361 500 2 260 195 154 340 x 425 124 136 156 48 20 M 20 690 384 100 2 260 184 147 360 x 455 140 160 182 60 20 M 22 930 498 700 2 770 170 135 380 x 475 140 160 182 60 20 M 22 930 526 400 2 770 161 129 400 x 495 140 160 182 60 22 M 22 930 609 500 3 050 168 136 420 x 515 140 160 182 60 24 M 22 930 698 200 3 320 175 143 440 x 535 140 160 182 60 24 M 22 930 731 400 3 320 167 137 460 x 555 140 160 182 60 24 M 22 930 764 700 3 320 160 132 480 x 575 140 160 182 60 25 M 22 930 831 200 3 460 159 133 500 x 595 140 160 182 60 25 M 22 930 866 000 3 460 153 129 520 x 615 140 160 182 60 28 M 22 930 1 008 000 3 880 165 139 540 x 635 140 160 182 60 28 M 22 930 1 047 000 3 880 159 135 560 x 655 140 160 182 60 30 M 22 930 1 164 000 4 160 164 140 580 x 675 140 160 182 60 30 M 22 930 1 205 000 4 160 158 136 600 x 695 140 160 182 60 30 M 22 930 1 247 000 4 160 153 132 NOTE: This series of locking device (MAV1008) is used for particular applications, especially in the field of drums for conveyors and rolling mills (see right-top sketch). MAV SpA has more than ten years of experience in this sector and is specialized in the design of locking devices, based on datas supplied by the customer, that are able to complete satisfy even the most particular requirements. Furthermore, on request, it is possible to manufacture locking devices larger than those shown in the above tables. using MAV1008 series outer T-ring 1008 Top: Locking of a conveyor belt drum using MAV1008 locking device. The use of this series allows a reduction of the diametr of the shaft in order to reduce the rotational bending. Bottom: Contemporaneous locking of the slow shaft and slow wheel in a high power reduction gear using two MAV4061 locking device. using two MAV4061 series - 13 -

CLAMPING DEVICES WITH SHOULDER FLANGES All of the clamping devices of this family are self centering and are suitable for medium-high torque applications. MAV1062, MAV6901 and MAV6903 feature a slight axial movement (which will be in the order of tenths of a millimeter) of the hub when the screws are tightened. Where a perfect axial positioning is required it is reccomended using one of the other series (MAV1061, MAV3061, MAV3062, MAV3063, MAV5061, MAV6902). Correct mounting (see page no.15) provides excellent results in terms of concentricity and perpendicularity. These series of MAV locking devices are composed of an internal flange, an external ring (or flange on MAV5061) and a set of screws class 12.9 (DIN912- UNI5931). The internal flange has two distinct set of holes. The first are smooth sided through which the screws are used to lock the coupling are inserted. The second set of holes are threaded and used during removal operations. The same screws are used for installation and removal operations (see page no.15); this means that there is no need for different tools in the two stages, all is required is a good torque wrench. Installation and removal instruction...page no.15 Samples of applications... page no.17, 19, 21, 22 MAV 1061 series MAV1062 series MAV 5061 series MAV 6903 series MAV 3061-2-3 series MAV 6901 series MAV 6902 series Note: The high pressure values (Pa) and (Pm) by all MAV locking devices developed are a good guarantee against formation of rust; this further facilitates removal operations.

INSTALLATION and REMOVAL instruction 1061, 1062, 3061-2-3, 6901, 6902, 5061, 6903 series INSTALLATION The locking devices are supplied ready to be installed. The transmissible torque of this system is calculated with a friction coefficient of μ= 0,12 with slightly oiled screws, tapering and hub. 1 - Unscrew all the locking srews by at least two or three turns and transfer at least three symetrically opposite in the extraction holes of the flange of the internal ring, in order to separate the two rings to make the insertion of the locking assembly into its housings in the hub and shaft easier. 2 - Reposition the screws in the tightening holes 3 - Progressively tighten the screws in several passes in a crosswise pattern until the tightening torque (Ma) shown in the catalogue is reached. The screws close to the cut in the internal ring should be tightened last, so that deformation is not caused to the ring. NOTE: To compensate for settling of adjacent screws, it is recommended that a last tightening pass is made with a slightly higher (3 to 5%) torque (Ma) than the one shown in the catalogue. 4 - After the installation is terminated, check the tightness of the screws in a clockwise and anticlockwise direction to ensure that none can be unscrewed by applying the torque (Ma) shown in the catalogue. If this is not the case repeat the procedure of point no. 3. No further checks are necessary after the assembly has entered into operation. REMOVAL A -Unscrew all the screws moving them the amount necessary in the extraction holes present in the flange. B -Separate the rings by progressively tightening the screws in a crosswise pattern, keeping in mind that the screws adjacent to the cut are tightened last. WARNING: it is important not to use Molybdenum Disulfide, e.g. Molykote, Never-Seeze or similar lubricants in any locking assembly installation. - 15 -

H4 H3 H2 H1 SELF CENTRING MEDIUM-HIGH TORQUES flange cone class 12.9 DIN912 - UNI5931 Ø d Ø D Ø D 1 1061-16 - DIMENSIONS SCREWS SPECIFICATIONS d x D D 1 H1 H2 H3 H4 n. Size Ma Mt Fax Pa Pm 14 x 28 32 14 17 21 25 4 M 4 5 68 10 132 66 15 x 28 32 14 17 21 25 4 M 4 5 73 10 123 66 16 x 32 37 14 18 22 26 4 M 4 5 78 10 115 58 18 x 47 54 17 23 29 35 5 M 6 17 250 28 241 92 19 x 47 54 17 23 29 35 5 M 6 17 260 28 229 92 20 x 47 54 17 23 29 35 5 M 6 17 280 28 217 92 22 x 47 54 17 23 29 35 5 M 6 17 310 28 197 92 24 x 50 57 17 23 29 35 6 M 6 17 400 33 217 104 25 x 50 57 17 23 29 35 6 M 6 17 420 33 209 104 28 x 55 64 17 23 29 35 6 M 6 17 470 33 186 95 30 x 55 64 17 23 29 35 6 M 6 17 500 33 174 95 32 x 60 69 17 23 29 35 8 M 6 17 710 45 217 116 35 x 60 69 17 23 29 35 8 M 6 17 780 45 199 116 38 x 65 74 17 23 29 35 8 M 6 17 850 45 183 107 40 x 65 74 17 23 29 35 8 M 6 17 890 45 174 107 42 x 75 84 20 27 35 43 7 M 8 41 1 510 72 227 127 45 x 75 84 20 27 35 43 7 M 8 41 1 620 72 212 127 48 x 80 89 20 27 35 43 7 M 8 41 1 730 72 199 119 50 x 80 89 20 27 35 43 7 M 8 41 1 800 72 191 119 55 x 85 94 20 27 35 43 8 M 8 41 2 260 82 198 128 60 x 90 99 20 27 35 43 8 M 8 41 2 470 82 182 121 65 x 95 104 20 27 35 43 9 M 8 41 3 010 93 189 129 70 x 110 119 24 31 41 51 8 M 10 83 4 730 135 213 136 75 x 115 124 24 31 41 51 8 M 10 83 5 070 135 199 130 80 x 120 129 24 31 41 51 8 M 10 83 5 410 135 187 124 85 x 125 134 24 31 41 51 9 M 10 83 6 460 152 198 134 90 x 130 139 24 31 41 51 9 M 10 83 6 840 152 187 129 95 x 135 144 24 31 41 51 10 M 10 83 8 020 169 197 138 100 x 145 154 26 33 45 57 8 M 12 145 10 100 202 206 142 110 x 155 164 26 33 45 57 8 M 12 145 11 100 202 187 133 120 x 165 174 26 33 45 57 9 M 12 145 13 600 227 193 140 130 x 180 189 34 41 55 69 9 M 14 230 19 800 305 183 132 140 x 190 199 34 41 55 69 9 M 14 230 21 400 305 170 125 150 x 200 209 34 41 55 69 10 M 14 230 25 400 339 176 132 160 x 210 219 34 41 55 69 11 M 14 230 29 900 373 182 139 170 x 225 234 44 51 65 79 12 M 14 230 34 600 407 144 109 180 x 235 244 44 51 65 79 12 M 14 230 36 600 407 136 104 190 x 250 259 44 51 65 79 15 M 14 230 48 300 509 161 123 200 x 260 269 44 51 65 79 15 M 14 230 50 900 509 153 118 220 x 285 294 50 57 73 89 12 M 16 355 61 300 558 134 104 240 x 305 314 50 57 73 89 15 M 16 355 83 600 697 154 121 260 x 325 334 50 57 73 89 18 M 16 355 108 700 836 171 137 280 x 355 364 60 67 85 103 16 M 18 485 125 600 897 142 112 300 x 375 384 60 67 85 103 18 M 18 485 151 400 1 009 149 119 320 x 405 414 74 82 102 122 18 M 20 690 209 200 1 308 146 116 340 x 425 434 74 82 102 122 21 M 20 690 259 400 1 526 161 129 360 x 455 464 86 94 116 138 18 M 22 930 291 600 1 620 139 110 380 x 475 484 86 94 116 138 21 M 22 930 359 000 1 890 153 123 400 x 495 504 86 94 116 138 21 M 22 930 377 900 1 890 146 118 Ma screw tightening torque Nm Mt transmissible torque (with Fax = 0) Nm Fax axial force (with Fax = 0) kn Pa specific pressure on the shaft N/mm 2 Pm specific pressure on the hub N/mm 2 MAV1061 and MAV1062 series have the same technical lay-out (inner and outer diameters, number and size of screws, etc.); the only dimensional difference between the two is the outer diameter of the internal flange (see above); infact on MAV1061 series it is larger than the diameter of the rear cone thus forming a shoulder for the hub, with two important results: 1/ the small axial displacement of the hub in respect to the shaft during assembly is eliminated. 2/ Where possible, the perpendicularity of the hub in respect to the shaft is improved. Correct mounting (see page no.15) provides excellent results in terms of concentricity and perpendicularity, the values of which are maintained within the range 0,015 and 0,03 mm on MAV1061 and between 0,025 and 0,045mm on MAV1602 series. MAV1061 locking device is particularly suitable for those applications where the maximum radial and axial positioning accuracy is required, with medium to high transmissible torque, as is the case in the coupling of helical gear wheels, pinion gears, tapered gear wheels and cams. These two series are an excellent alternative to MAV2005 locking device and improves some characteristics while maintaining same inner and outer diameters. The accuracy of these locking devices also make them particularly suitable for all those sectors where, due to high rotation velocity, the presence of eccentricity even if modest, could be damaging, for example in the case of turbines and large ventilators. Removal instruction (see page no.15). NOTE: tighten the screws of MAV1062 to the same values (Ma) of MAV1061 is also possible: the values Mt, Fax, Pa e Pm will increase proportionally. In this latter case the locking device dimension H3 must be completely embedded within the hub in order to avoid possible bendings of the inner flange of the locking device. ORDER EXAMPLE For a shaft with d=70 mm and a hub with D=110 mm and a transmissible torque value lower than, or equal to, 4730 Nm indicate in the order: Locking Device MAV1061 70 x 110

H4 H3 H2 H1 SELF CENTRING MEDIUM-HIGH TORQUES flange cone class 12.9 DIN912 - UNI5931 Ø d Ø D 1062 DIMENSIONS SCREWS SPECIFICATIONS d x D H1 H2 H3 H4 n. Size Ma Mt Fax Pa Pm 14 x 32 14 17 21 25 4 M 4 5 100 15 209 91 15 x 32 14 17 21 25 4 M 4 5 110 15 195 91 16 x 32 14 18 22 26 4 M 4 5 120 15 183 91 18 x 47 17 23 29 35 5 M 6 14 320 36 314 120 19 x 47 17 23 29 35 5 M 6 14 340 36 297 120 20 x 47 17 23 29 35 5 M 6 14 360 36 283 120 22 x 47 17 23 29 35 5 M 6 14 390 36 257 120 24 x 50 17 23 29 35 6 M 6 14 520 43 283 136 25 x 50 17 23 29 35 6 M 6 14 540 43 271 136 28 x 55 17 23 29 35 6 M 6 14 600 43 242 123 30 x 55 17 23 29 35 6 M 6 14 650 43 226 123 32 x 60 17 23 29 35 8 M 6 14 920 57 283 151 35 x 60 17 23 29 35 8 M 6 14 1 000 57 258 151 38 x 65 17 23 29 35 8 M 6 14 1 100 57 238 139 40 x 65 17 23 29 35 8 M 6 14 1 150 57 226 139 42 x 75 20 27 35 43 7 M 8 35 2 040 97 307 172 45 x 75 20 27 35 43 7 M 8 35 2 190 97 287 172 48 x 80 20 27 35 43 7 M 8 35 2 330 97 269 161 50 x 80 20 27 35 43 7 M 8 35 2 430 97 258 161 55 x 85 20 27 35 43 8 M 8 35 3 050 111 268 174 60 x 90 20 27 35 43 8 M 8 35 3 330 111 246 164 65 x 95 20 27 35 43 9 M 8 35 4 060 125 255 175 70 x 110 24 31 41 51 8 M 10 69 6 230 178 281 179 75 x 115 24 31 41 51 8 M 10 69 6 670 178 262 171 80 x 120 24 31 41 51 8 M 10 69 7 120 178 246 164 85 x 125 24 31 41 51 9 M 10 69 8 510 200 261 177 90 x 130 24 31 41 51 9 M 10 69 9 010 200 246 170 95 x 135 24 31 41 51 10 M 10 69 10 500 222 259 182 100 x 145 26 33 45 57 8 M 12 120 13 220 264 270 186 110 x 155 26 33 45 57 8 M 12 120 14 550 264 245 174 120 x 165 26 33 45 57 9 M 12 120 17 850 297 253 184 130 x 180 34 41 55 69 9 M 14 190 25 970 399 240 173 140 x 190 34 41 55 69 9 M 14 190 27 970 399 223 164 150 x 200 34 41 55 69 10 M 14 190 33 300 444 231 173 160 x 210 34 41 55 69 11 M 14 190 39 070 488 238 181 170 x 225 44 51 65 79 12 M 14 190 45 290 532 189 143 180 x 235 44 51 65 79 12 M 14 190 47 950 532 178 137 190 x 250 44 51 65 79 15 M 14 190 63 270 666 211 161 200 x 260 44 51 65 79 15 M 14 190 66 600 666 201 154 220 x 285 50 57 73 89 12 M 16 295 80 970 736 178 137 240 x 305 50 57 73 89 15 M 16 295 110 420 920 203 160 260 x 325 50 57 73 89 18 M 16 295 143 550 1 104 225 180 280 x 355 60 67 85 103 16 M 18 405 166 210 1 187 187 148 300 x 375 60 67 85 103 18 M 18 405 200 340 1 335 197 157 320 x 405 74 82 102 122 18 M 20 580 279 320 1 745 196 155 340 x 425 74 82 102 122 21 M 20 580 346 240 2 036 215 172 360 x 455 86 94 116 138 18 M 22 780 388 060 2 155 185 146 380 x 475 86 94 116 138 21 M 22 780 477 890 2 515 204 163 400 x 495 86 94 116 138 21 M 22 780 503 040 2 515 194 157 Ma screw tightening torque Nm Mt transmissible torque (with Fax = 0) Nm Fax axial force (with Fax = 0) kn Pa specific pressure on the shaft N/mm 2 Pm specific pressure on the hub N/mm 2 MAV technical informations and examples are available on MAV Internet site at the following address: http://www.mav.it Send us your Email enquiries at: info@mav.it Lever assembly using a MAV1061 locking device. Maximum concentricity and perpendicularity in respect to the shaft is guaranteed, avoiding the precentering bushes needed for example with MAV 2005 locking device. MAV can produce clamping elements for shaft diameter from 6mm up to 1000mm. Almost all series are also available in inch sizes. Pieces in stainless steel are manufactured on request. MAV can design and calculate any application of clamping elements. ORDER EXAMPLE For a shaft with d=40 mm and a hub with D=65 mm and a transmissible torque value lower than, or equal to 1110 Nm indicate in the order: Locking Device MAV 1062 70 x 110-17 -

H4 H3 H2 H1 SELF CENTRING MEDIUM-HIGH TORQUES flange cone Ø d min Ø d max Ø D Ø D1 class 12.9 DIN912 - UNI5931 306123 series 3063 3062 3061 DIMENSIONS SCREWS SPECIFICATIONS d x D H1 H2 H3 H4 D1 n. Size Ma Mt Fax Pa Pm 14 x 55 17 23 31 39 62 4 M 8 41 290 41 459 117 16 x 55 17 23 31 39 62 4 M 8 41 330 41 401 117 18 x 55 17 23 31 39 62 4 M 8 41 370 41 357 117 19 x 55 17 23 31 39 62 4 M 8 41 390 41 338 117 20 x 55 17 23 31 39 62 4 M 8 41 410 41 321 117 22 x 55 17 23 31 39 62 4 M 8 41 450 41 292 117 24 x 55 17 23 31 39 62 4 M 8 41 490 41 268 117 25 x 55 17 23 31 39 62 4 M 8 41 510 41 257 117 28 x 55 17 23 31 39 62 4 M 8 41 580 41 229 117 30 x 55 17 23 31 39 62 4 M 8 41 620 41 214 117 24 x 65 17 23 31 39 72 5 M 8 41 620 51 334 123 25 x 65 17 23 31 39 72 5 M 8 41 640 51 321 123 28 x 65 17 23 31 39 72 5 M 8 41 720 51 287 123 30 x 65 17 23 31 39 72 5 M 8 41 770 51 268 123 32 x 65 17 23 31 39 72 5 M 8 41 820 51 251 123 35 x 65 17 23 31 39 72 5 M 8 41 900 51 229 123 38 x 65 17 23 31 39 72 5 M 8 41 980 51 211 123 40 x 65 17 23 31 39 72 5 M 8 41 1 030 51 201 123 30 x 80 20 26 34 42 88 7 M 8 41 1 080 72 318 119 32 x 80 20 26 34 42 88 7 M 8 41 1 150 72 299 119 35 x 80 20 26 34 42 88 7 M 8 41 1 260 72 273 119 38 x 80 20 26 34 42 88 7 M 8 41 1 370 72 251 119 40 x 80 20 26 34 42 88 7 M 8 41 1 440 72 239 119 42 x 80 20 26 34 42 88 7 M 8 41 1 510 72 227 119 45 x 80 20 26 34 42 88 7 M 8 41 1 620 72 212 119 48 x 80 20 26 34 42 88 7 M 8 41 1 730 72 199 119 50 x 80 20 26 34 42 88 7 M 8 41 1 800 72 191 119 Ma screw tightening torque Nm Mt transmissible torque (with Fax = 0) Nm Fax axial force (with Fax = 0) kn Pa specific pressure on the shaft N/mm 2 Pm specific pressure on the hub N/mm 2 These series (MAV3061, MAV3062 and MAV3063) of locking devices have been designed to satisfy the requirement of using units pre-assembled or united on shafts of different diameters, as is the case with sheaves or gear pulleys. It often happens that, depending on the size of the pulley and the number of sheaves etc., the size of the shaft can be different. In this case user has normally two options: 1/ In case of small numbers, acquire solid hub pulleys and drill the holes to the required diameter and cut the seat for the tab. 2/ In case of large numbers, acquire pulleys that have already been prepared with the consequent increase in costs. However the user must still cut the notch for the tab on the shaft. In view of increasing standardization in the field of transmission components, MAV has taken upon itself, in cooperation with the main pulley manufacturers, to design and produce MAV3061-2-3 series. Thanks to the standardization of the external diameter (D) it is possible to speed up production by using standard pulleys rather than "made to measure", which provides further benefits for warehouse management and costs. Apart from these important savings, the application gains all the benefits offered by the coupling precision of the locking devices in this series. Correct fitting (see page no.15) provides excellent results in terms of concentricity and perpendicularity, the values of which are maintained within the range 0,015-0,03 mm. This means that the MAV3061, MAV3062 and MAV3063 series of locking devices are particularly suitable for those assemblies where the maximum radial and axial positioning accuracy is required, with medium to high transmissible torque. The accuracy of these locking devices also make them particularly suitable for all those applications where, due to high rotation speed, the presence of eccentricity even if modest, could be damaging (e.g. heavy pulleys that act as a flywheel). - 18 - ORDER EXAMPLE Eg.: With a shaft diameter d=30 mm, the following three different coupling's solutions are possible: 1 st GROUP with D = 55 mm MAV 3061 30x55 (where dimension D is both the outer diameter of the locking device and pulley's bore) 2 nd GROUP with D = 65 mm MAV 3062 30x65 (where dimension D is both the outer diameter of the locking device and pulley's bore) 3 rd GROUP with D = 80 mm MAV 3063 30x80 (where dimension D is both the outer diameter of the locking device and pulley's bore)

H4 H3 H2 H1 SAMOSTŘEDÍCÍ STŘEDNÍ KR.MOMENT vnitřní příruba objímka vnější příruba Ø d Ø D Ø D1 Ø D2 třída12.9 DIN912 - UNI5931 Rozměry Šroub Tlak d x D H1 H2 H3 H4 D1 D2 n. Size Ma Mt Fax Pa Pm 6 x 14 10 19 22 26 23 25 3 M 4 5 21 7 273 134 8 x 15 12 22 25 29 24 27 3 M 4 5 28 7 177 104 9 x 16 14 24 27 31 26 29 4 M 4 5 42 9 182 112 10 x 16 14 24 27 31 26 29 4 M 4 5 47 9 166 112 11 x 18 14 25 28 32 28 32 4 M 4 5 52 9 149 99 12 x 18 14 25 28 32 28 32 4 M 4 5 57 9 138 99 14 x 23 14 25 28 32 33 38 4 M 4 5 66 9 114 78 15 x 24 16 30 37 43 40 44 3 M 6 17 125 17 167 115 16 x 24 16 30 37 43 40 44 3 M 6 17 134 17 159 115 17 x 25 18 33 40 46 41 45 4 M 6 17 189 22 179 131 18 x 26 18 33 40 46 42 47 4 M 6 17 200 22 169 126 19 x 27 18 33 40 46 43 49 4 M 6 17 212 22 160 122 20 x 28 18 33 40 46 44 50 4 M 6 17 223 22 152 117 22 x 32 25 40 47 53 48 54 4 M 6 17 245 22 100 74 24 x 34 25 40 47 53 50 56 6 M 6 17 401 33 138 104 25 x 34 25 40 47 53 50 56 6 M 6 17 418 33 133 104 28 x 39 25 40 47 53 55 61 6 M 6 17 468 33 117 91 30 x 41 25 40 47 53 57 62 6 M 6 17 501 33 109 86 32 x 43 25 40 47 53 59 65 8 M 6 17 713 45 137 110 35 x 47 32 47 54 60 62 68 8 M 6 17 780 45 99 79 38 x 50 32 47 54 60 66 72 8 M 6 17 846 45 91 74 40 x 53 32 47 54 60 69 75 8 M 6 17 891 45 86 70 42 x 55 32 47 54 60 71 78 8 M 6 17 936 45 82 67 45 x 59 45 62 70 78 80 86 8 M 8 41 1 850 82 102 82 48 x 62 45 62 70 78 81 87 8 M 8 41 1 980 82 96 78 50 x 65 45 62 70 78 86 92 8 M 8 41 2 060 82 91 75 55 x 71 55 73 81 89 92 98 9 M 8 41 2 550 93 77 63 60 x 77 55 73 81 89 98 104 9 M 8 41 2 780 93 70 58 65 x 84 55 73 81 89 105 111 9 M 8 41 3 010 93 65 53 70 x 90 65 86 96 106 113 119 9 M 10 83 5 320 152 84 69 75 x 95 65 86 96 106 119 126 9 M 10 83 5 700 152 78 65 80 x 100 65 86 96 106 125 131 12 M 10 83 8 110 203 98 83 85 x 106 65 86 96 106 131 137 12 M 10 83 8 610 203 92 78 90 x 112 65 86 96 106 137 144 12 M 10 83 9 120 203 87 74 95 x 120 65 86 96 106 142 149 14 M 10 83 11 230 236 95 80 100 x 125 70 94 107 119 153 160 12 M 12 145 15 100 303 108 92 110 x 140 70 94 107 119 168 174 12 M 12 145 16 600 303 97 82 120 x 155 90 115 128 140 187 198 16 M 12 145 24 200 404 93 77 130 x 165 90 115 128 140 197 208 16 M 12 145 26 200 404 85 72 MAV1061 MAV5061 Příklad použití motáže s CONFIXEM MAV 5061 a MAV 1061. první je použité pro malý otvor pro pastorek, druhé pouzdro je standartní montáž. Přičemž je zaručena absence axiálního posuvu během fixace na na hřídel jež je nežádoucí kvůli tlaku který by mohl poškodit ozubení pastorku. 5061 Ma kroutící moment pro dotažení šroubů Nm Mt přenášený kroutící moment ( s Fax=0) Nm Fax axiální síla (s Fax =0) kn Pa flak na hřídel N/mm 2 Pm tlak na posuv (zdvih) N/mm 2 CONFIX MAV 5061 se používá je navržen pro aplikace, kde v náboji je malý prostor pro upínací pouzdro a jiné typy nelze použít. Při dotahování se hlavní objímka nepatrně axiálně posunuje na náboji, zatímco upínací pouzdro je v místě je v místě upevňování zablokované a současně dochází k zlepšení kolmosti uchyceného pouzdra k ose hřídele. Správných výsledků instalace upínacího dosáhneme křížovým utahováním šroubů v rozsahu 0,015 mm - 0,03 mm zdvihu při jednom kroku dotažení. Tím získáme správné vystředění a kolmosti pouzdra. Toto znamená, že tento typ upínacího pouzdra je zvláště vhodný tam, kde je požadována maximální přesnost axiálního a radiálního umístění jako základní spoj přiněmž poměr mezi jmenovitým průměrem a průměrem hřídele relativně malý ( válcovitý a šikmý pastorek, pružné spojky,vačky. Upínací pouzdra CONFIX MAV 5061 jsou tedy vhodná pro střední a malé zatížení, nejčastěji v odvětví automatizace strojů (textilní, balící stroje, kde se používají malé průměry nosných hřídelí a kde přenášené síly nejsou moc vysoké. Nestandardní průměry jež se nenacházejí v tabulce jsou dodání na poptávku. Pokyny pro montáž a demontáž viz str.15 CONFIX MAV se vyrábí pro průměry od 6 do 1000 mm nejen v metrické, ale i palcové soustavě. Na poptávku lze vyrobit i nerezové provedení. Jsme připraveni podílet se na vývoji a produkci upínacích elementu na vaši aplikaci. PŘÍKLAD OBJEDNÁVKY Pro hřídel s průměrem d =50 mm a otvorem s D=65 mm přenášející kr.moment menší nebo roven 2060 Nm zadání : CONFIX MAV 5061 50x65-19 -

H4 H3 H2 H1 SELF CENTRING MEDIUM-HIGH TORQUES flange cone class 12.9 DIN912 - UNI5931 Ø d Ø D 6901-20 - DIMENSIONS SCREWS SPECIFICATIONS d x D H1 H2 H3 H4 n. Size Ma Mt Fax Pa Pm 18 x 47 26 30 42 48 6 M 6 17 510 57 321 123 19 x 47 26 30 42 48 6 M 6 17 540 57 304 123 20 x 47 26 30 42 48 6 M 6 17 570 57 289 123 22 x 47 26 30 42 48 6 M 6 17 620 57 262 123 24 x 50 26 31 43 49 6 M 6 17 680 57 241 115 25 x 50 26 31 43 49 6 M 6 17 710 57 231 115 28 x 55 26 31 43 49 6 M 6 17 790 57 206 105 30 x 55 26 31 43 49 6 M 6 17 850 57 192 105 32 x 60 26 31 43 49 8 M 6 17 1 210 76 241 128 35 x 60 26 31 43 49 8 M 6 17 1 320 76 220 128 38 x 65 26 31 43 49 8 M 6 17 1 430 76 203 118 40 x 65 26 31 43 49 8 M 6 17 1 510 76 192 118 42 x 75 30 36 51 59 6 M 8 41 2 200 105 220 123 45 x 75 30 36 51 59 6 M 8 41 2 350 105 205 123 48 x 80 30 36 51 59 6 M 8 41 2 510 105 193 116 50 x 80 30 36 51 59 6 M 8 41 2 610 105 185 116 55 x 85 30 36 51 59 8 M 8 41 3 830 139 224 145 60 x 90 30 36 51 59 8 M 8 41 4 180 139 205 137 63 x 95 30 36 51 59 8 M 8 41 4 390 139 196 130 65 x 95 30 36 51 59 8 M 8 41 4 530 139 190 130 70 x 110 40 46 59 69 7 M 10 83 7 010 200 190 121 75 x 115 40 46 59 69 7 M 10 83 7 510 200 177 115 80 x 120 40 46 59 69 7 M 10 83 8 010 200 166 111 85 x 125 40 46 59 69 8 M 10 83 9 700 229 179 121 90 x 130 40 46 59 69 8 M 10 83 10 300 229 169 117 95 x 135 40 46 59 69 10 M 10 83 13 600 286 200 141 100 x 145 46 52 70 82 7 M 12 145 15 000 299 172 119 110 x 155 46 52 70 82 7 M 12 145 16 400 299 157 111 120 x 165 46 52 70 82 8 M 12 145 20 500 342 164 119 130 x 180 46 52 70 82 10 M 12 145 27 800 427 190 137 140 x 190 51 59 82 86 8 M 14 230 32 600 466 173 128 150 x 200 51 59 82 86 10 M 14 230 43 700 583 202 152 160 x 210 51 59 82 86 10 M 14 230 46 600 583 189 144 170 x 225 51 59 82 86 12 M 14 230 59 400 699 214 162 180 x 235 51 59 82 86 12 M 14 230 62 900 699 202 155 190 x 250 51 59 82 86 15 M 14 230 83 000 874 239 182 200 x 260 51 59 82 86 15 M 14 230 87 400 874 227 175 220 x 285 64 72 98 102 12 M 16 355 104 700 952 179 138 240 x 305 64 72 98 102 15 M 16 355 142 800 1 190 205 162 260 x 325 64 72 98 102 18 M 16 355 185 600 1 428 228 182 280 x 355 75 83 121 127 16 M 18 485 215 500 1 539 194 153 300 x 375 75 83 121 127 18 M 18 485 259 700 1 731 204 163 320 x 405 90 98 140 148 18 M 20 690 358 300 2 240 206 163 340 x 425 90 98 140 148 21 M 20 690 444 200 2 613 226 181 360 x 455 110 118 164 174 18 M 22 930 493 600 2 742 184 145 380 x 475 110 118 164 174 21 M 22 930 607 800 3 199 203 162 400 x 495 110 118 164 174 21 M 22 930 639 800 3 199 193 156 Ma screw tightening torque Nm Mt transmissible torque (with Fax = 0) Nm Fax axial force (with Fax = 0) kn Pa specific pressure on the shaft N/mm 2 Pm specific pressure on the hub N/mm 2 MAV6901 and MAV6902 series keep the same main characteristiscs of MAV1062 and MAV1061 series but have been specifically designed for use where greater transmissible torque (Mt) values are present and where lower specific pressures are allowed by the shaft and/or the hub. Infact the dimensions (H1-H2-H3-H4) of these locking devices are greater than those of the similar MAV1062 and MAV1061. The concentricity characteristics are the same while resistance to rotational bending is slightly improved. During fitting MAV6901, a small axial movement of the hub might occurs. Should this displacement, which will be in the order of tenths of a millimeter, not be acceptable, it is possible to use MAV6902 where a spacer has been added to eliminate the axial movement. In this way the flange has a fixed stop that is connected to the shaft and onto which the hub can rest while the locking device is being tightened with the result that, apart from eliminating axial movements, the orthogonality of the assembled parts is improved.the higher axial friction of the external ring respect to the hub causes a slight reduction of the transmissible torque and axial force values when compared to MAV6901. Correct fitting, where the screws are tightened in a crosswise pattern, highlights the excellent concentricity characteristics of these locking devices: values of 0,02 0,04 and 0,015 0,03 respectively for MAV6901 and MAV6902. In cases where the assembled parts might be subject to particularly aggressive agents (eg.: high humidity with the presence of abrasive dust) it is recommended that consideration be given to the use of the MAV 1008 locking device that has been specifically designed for this kind of applications, or that the locking device is protected by a flange that makes the housing watertight and which can be connected using extraction holes (see example drawing in the top of next page). Installation and removal instructions (see page no.15). ORDER EXAMPLE For a shaft with d=130mm and a hub with D=180 mm and a transmissible torque value lower than, or equal to, 27 800Nm would you please indicate in your order: LOCKING DEVICE MAV 6901 130 x 180

H4 H3 H2 H1 SELF CENTRING MEDIUM-HIGH TORQUES flange cone class 12.9 DIN912 - UNI5931 Ø d Ø D Ø D 1 DIMENSIONS SCREWS SPECIFICATIONS d x D H1 H2 H3 H4 n. Size Ma Mt Fax Pa Pm D 1 18 x 47 53 26 30 42 48 6 M 6 17 310 35 197 76 19 x 47 53 26 30 42 48 6 M 6 17 330 35 187 76 20 x 47 53 26 30 42 48 6 M 6 17 350 35 178 76 22 x 47 53 26 30 42 48 6 M 6 17 380 35 162 76 24 x 50 56 26 31 43 49 6 M 6 17 420 35 148 71 25 x 50 56 26 31 43 49 6 M 6 17 440 35 142 71 28 x 55 61 26 31 43 49 6 M 6 17 490 35 127 65 30 x 55 61 26 31 43 49 6 M 6 17 520 35 118 65 32 x 60 66 26 31 43 49 8 M 6 17 740 46 148 79 35 x 60 66 26 31 43 49 8 M 6 17 810 46 135 79 38 x 65 71 26 31 43 49 8 M 6 17 880 46 125 73 40 x 65 71 26 31 43 49 8 M 6 17 930 46 118 73 42 x 75 81 30 36 51 59 6 M 8 41 1 350 64 135 76 45 x 75 81 30 36 51 59 6 M 8 41 1 450 64 126 76 48 x 80 86 30 36 51 59 6 M 8 41 1 540 64 119 71 50 x 80 86 30 36 51 59 6 M 8 41 1 610 64 114 71 55 x 85 91 30 36 51 59 8 M 8 41 2 360 86 138 89 60 x 90 96 30 36 51 59 8 M 8 41 2 570 86 126 84 63 x 95 102 30 36 51 59 8 M 8 41 2 700 86 120 80 65 x 95 102 30 36 51 59 8 M 8 41 2 790 86 117 80 70 x 110 117 40 46 59 69 7 M 10 83 4 310 123 117 74 75 x 115 122 40 46 59 69 7 M 10 83 4 620 123 109 71 80 x 120 127 40 46 59 69 7 M 10 83 4 930 123 102 68 85 x 125 132 40 46 59 69 8 M 10 83 5 990 141 110 75 90 x 130 137 40 46 59 69 8 M 10 83 6 340 141 104 72 95 x 135 142 40 46 59 69 10 M 10 83 8 360 176 123 86 100 x 145 153 46 52 70 82 7 M 12 145 9 200 184 106 73 110 x 155 163 46 52 70 82 7 M 12 145 10 100 184 96 68 120 x 165 173 46 52 70 82 8 M 12 145 12 600 210 101 74 130 x 180 188 46 52 70 82 10 M 12 145 17 100 263 117 84 140 x 190 199 51 59 82 86 8 M 14 230 20 100 287 107 79 150 x 200 209 51 59 82 86 10 M 14 230 26 900 359 124 93 160 x 210 219 51 59 82 86 10 M 14 230 28 700 359 117 89 170 x 225 234 51 59 82 86 12 M 14 230 36 600 430 132 100 180 x 235 244 51 59 82 86 12 M 14 230 38 700 430 124 95 190 x 250 259 51 59 82 86 15 M 14 230 51 100 538 147 112 200 x 260 269 51 59 82 86 15 M 14 230 53 800 538 140 108 220 x 285 294 64 72 98 102 12 M 16 355 65 100 592 111 86 240 x 305 314 64 72 98 102 15 M 16 355 88 700 740 128 101 260 x 325 334 64 72 98 102 18 M 16 355 115 400 887 141 113 280 x 355 364 75 83 121 127 16 M 18 485 132 900 949 120 95 300 x 375 384 75 83 121 127 18 M 18 485 160 200 1 068 126 101 320 x 405 414 90 98 140 148 18 M 20 690 220 800 1 380 127 100 340 x 425 434 90 98 140 148 21 M 20 690 273 700 1 610 140 112 360 x 455 464 110 118 164 174 18 M 22 930 307 000 1 706 114 90 380 x 475 484 110 118 164 174 21 M 22 930 378 100 1 990 126 101 400 x 495 504 110 118 164 174 21 M 22 930 398 000 1 990 120 97 spacer 6902 Ma screw tightening torque Nm Mt transmissible torque (with Fax = 0) Nm Fax axial force (with Fax = 0) kn Pa specific pressure on the shaft N/mm 2 Pm specific pressure on the hub N/mm 2 using MAV6901 series SAVING ON STOCK VOLUMES! MAV6902 series is just a combination of MAV6901 and a spacer: order them separately to save on stock volumes. How to order the spacer to make MAV6902 70x110: spacer for MAV6901 70x110 using MAV6902 series - 21 -

H4 H3 H2 H1 SELF CENTRING MEDIUM-HIGH TORQUES outer flange inner flange class 12.9 DIN912 - UNI5931 Ø d Ø D 6903 DIMENSIONS SCREWS SPECIFICATIONS d x D H1 H2 H3 H4 n. Size Ma Mt Fax Pa Pm 20 x 47 12 17 29 35 5 M 6 17 280 28 154 65 22 x 47 12 17 29 35 5 M 6 17 310 28 140 65 24 x 50 12 17 29 35 6 M 6 17 400 33 154 74 25 x 50 12 17 29 35 6 M 6 17 420 33 148 74 28 x 55 12 17 29 35 6 M 6 17 470 33 132 67 30 x 55 12 17 29 35 6 M 6 17 500 33 123 67 32 x 60 12 17 29 35 8 M 6 17 710 45 154 82 35 x 60 12 17 29 35 8 M 6 17 780 45 141 82 38 x 65 12 17 29 35 8 M 6 17 850 45 130 76 40 x 65 12 17 29 35 8 M 6 17 890 45 123 76 42 x 75 15 21 36 44 7 M 8 41 1 510 72 152 85 45 x 75 15 21 36 44 7 M 8 41 1 620 72 142 85 48 x 80 15 21 36 44 7 M 8 41 1 730 72 133 80 50 x 80 15 21 36 44 7 M 8 41 1 800 72 127 80 55 x 85 15 21 36 44 8 M 8 41 2 260 82 132 86 60 x 90 15 21 36 44 8 M 8 41 2 470 82 121 81 65 x 95 15 21 36 44 9 M 8 41 3 010 93 126 86 70 x110 20 26 46 56 8 M 10 83 4 730 135 160 102 75 x115 20 26 46 56 8 M 10 83 5 070 135 149 97 80 x120 20 26 46 56 8 M 10 83 5 410 135 112 75 85 x125 20 26 46 56 9 M 10 83 6 460 152 119 81 90 x130 20 26 46 56 9 M 10 83 6 840 152 112 78 95 x135 20 26 46 56 10 M 10 83 8 020 169 118 83 100 x145 25 31 56 68 8 M 12 145 10 100 202 107 74 110 x155 25 31 56 68 8 M 12 145 11 100 202 97 69 120 x165 25 31 56 68 9 M 12 145 13 600 227 100 73 Ma screw tightening torque Nm Mt transmissible torque (with Fax = 0) Nm Fax axial force (with Fax = 0) kn Pa specific pressure on the shaft N/mm 2 Pm specific pressure on the hub N/mm 2 MAV6903 series has been designed for a specific purpose: to obtain, during locking of the element, an axial force that can be used to lock other elements (e.g. bearings) adjacent to hub. This is made possible by using a configuration similar to MAV1062 with the screws mounted on the opposite side od the locking element. As a consequence it is possible to exploit the movement of the external ring and therefore that of the locked hub, in respect to the internal ring and shaft. This hub movement, transmitted to nearby elements through flanges or spacers, means a locking force along the axis of the shaft (with values similar to that provided by the sum of the forces generated by each of the screws). MAV6903 maintains all the characteristics of precision and easy installation and removal operations of other locking devices, as well as maximum concentricity, good transmissible torque values and excellent hub to shaft perpendicularity. A typical example of an assembly is shown in the figure (bottom-left), where the locking of the flywheel also allows the axial locking of the corresponding bearing. This allows savings in space and intermediate operations while the usual cover used to lock the bearing can be avoided or sized to be used as a dust cover or oil splash guard. It is clear that in that case the thrust flange must be appropriately prepared, however the work required will be less than that for long and large sized shafts. This type of locking device can also be constructed to the drawings of the customer to match special requirements. Installation and Removal instruction (see page no.15). MAV can produce devices for shaft diameter from 6mm up to 1000mm. Almost all series are also available in inch sizes. Pieces in stainless steel are manufactured on request. MAV can design and calculate any application of clamping elements. - 22 - ORDER EXAMPLE For a shaft with d=70 mm and a hub with D=110 mm and transmissible torque value lower than, or equal to, 4730Nm indicate in the order MAV 6903 70 x 110 LOCKING DEVICE

MAV 2005 series no axial displacement while fixing not self locking high transmissible torques MAV 3003 series reduced thickness of the device not self locking CLAMPING DEVICES FOR GENERAL PURPOSES This family of clamping devices are probably the most wellknown and used ones and millions of examples have been manufactured. These series (MAV2005 and MAV3003) are used in a huge number of applications in the mechanical field. Are not self-centering and therefore require centering face between hub and shaft to align the two. Machining tolerances required on shaft and hubs for MAV2005 series are h11 for shaft diameters and H11 for hub bores. Machining tolerances required on shafts and hubs for MAV3003 series: diameters shaft hub's bore up to 38mm h6 H7 bigger h8 H8 Note: the pressures developed by all of MAV locking devices in the locking area are enough to provide protection against rust at the contact point, but particular attention should be paid to the protection of the area covered by the centring face where it is possible for rust to form, thereby removal operations might be difficult. Installation and removal instruction... page no. 25, 27 Samples of assembling... page no. 24, 25, 27

H3 H2 H1 Through cone vnější kroužek Ø d Ø D DIN912 UNI 5931 2005-24 - d x D H1 H2 H3 n. Size Ma Mt Fax Pa Pm 18 x 47 17 20 26 8 M 6 17 300 33 332 127 19 x 47 17 20 26 8 M 6 17 310 33 314 127 20 x 47 17 20 26 8 M 6 17 330 33 298 127 22 x 47 17 20 26 8 M 6 17 360 33 271 127 24 x 50 17 20 26 9 M 6 17 440 37 280 134 25 x 50 17 20 26 9 M 6 17 460 36 269 134 28 x 55 17 20 26 10 M 6 17 560 40 266 136 30 x 55 17 20 26 10 M 6 17 600 40 249 136 32 x 60 17 20 26 12 M 6 17 770 48 280 149 35 x 60 17 20 26 12 M 6 17 830 48 256 149 38 x 65 17 20 26 14 M 6 17 1 050 55 275 161 40 x 65 17 20 26 14 M 6 17 1 100 55 261 161 42 x 75 20 24 32 12 M 8 41 1 830 87 336 188 45 x 75 20 24 32 12 M 8 41 1 950 87 314 188 48 x 80 20 24 32 12 M 8 41 2 080 87 294 176 50 x 80 20 24 32 12 M 8 41 2 160 86 282 176 55 x 85 20 24 32 14 M 8 41 2 750 100 300 194 60 x 90 20 24 32 14 M 8 41 2 990 100 275 183 65 x 95 20 24 32 16 M 8 41 3 680 113 290 198 70 x 110 24 28 38 14 M 10 83 5 650 162 321 204 75 x 115 24 28 38 14 M 10 83 6 030 161 300 196 80 x 120 24 28 38 14 M 10 83 6 410 160 281 187 85 x 125 24 28 38 16 M 10 83 7 750 182 302 206 90 x 130 24 28 38 16 M 10 83 8 180 182 286 198 95 x 135 24 28 38 18 M 10 83 9 680 204 304 214 100 x 145 26 33 45 14 M 12 145 11 690 234 307 212 110 x 155 26 33 45 14 M 12 145 12 780 232 279 198 120 x 165 26 33 45 16 M 12 145 15 850 264 293 213 130 x 180 34 38 50 20 M 12 145 21 360 329 258 187 140 x 190 34 38 50 22 M 12 145 25 180 360 264 194 150 x 200 34 38 50 24 M 12 145 29 310 391 269 201 160 x 210 34 38 50 26 M 12 145 33 730 422 273 208 170 x 225 38 44 58 22 M 14 230 41 210 485 265 200 180 x 235 38 44 58 24 M 14 230 47 430 527 273 209 190 x 250 46 52 66 28 M 14 230 58 360 613 249 190 200 x 260 46 52 66 30 M 14 230 65 450 655 254 195 220 x 285 50 56 72 26 M 16 355 85 090 774 252 195 240 x 305 50 56 72 30 M 16 355 106 520 888 267 210 260 x 325 50 56 72 34 M 16 355 130 130 1 001 279 223 280 x 355 60 66 84 32 M 18 485 157 960 1 128 245 193 300 x 375 60 66 84 36 M 18 485 189 580 1 264 257 206 320 x 405 72 78 98 36 M 20 690 260 250 1 627 259 205 340 x 425 72 78 98 36 M 20 690 275 470 1 620 244 195 360 x 455 84 90 112 36 M 22 930 356 360 1 980 242 192 380 x 475 84 90 112 36 M 22 930 374 890 1 973 230 184 400 x 495 84 90 112 36 M 22 930 393 360 1 967 218 176 420 x 515 84 90 112 40 M 22 930 457 520 2 179 231 188 440 x 545 96 102 126 40 M 24 1 200 562 140 2 555 227 183 460 x 565 96 102 126 40 M 24 1 200 586 060 2 548 217 177 480 x 585 96 102 126 42 M 24 1 200 640 410 2 668 218 179 500 x 605 96 102 126 44 M 24 1 200 697 080 2 788 220 181 sh vnitřní kroužek Threaded cone Tuto sérii výrobce doporučuje použít pro údržbu nebo za účelem náhrady. U nových konstrukcí je dobré se přesvědčit zda nelze použít CONFIX MAV 1061 nebo 1062. Both outer and inner rings are cut along a generatrix so that they have maximum radial deformation flexibility. The front cone has a set of smooth sided holes necessary for the insertion of the screws; these holes lead to a set of threaded holes in the rear cone. Under the silver screw heads there is a set of smooth sided holes [sh] are partially threaded and are used during removal operations (see page no.25). These screws are in the next larger size to those used for assembling. Centering face must have a width enough to support the hub during assembly and, generally speaking, it should not be less than twice the width of the locking device housing in the hub. The configuration of MAV2005 locking devices is so that normally during assembly there is not any axial movement of the hub. After tightening with a torque wrench, the screws should normally only be subjected to 1 2 x 1 centering face their static load and therefore it is necessary to carefully check the sizing of long shafts where rotational bending might occur. The values of the camber should fall within the range 0,30 0,35 per thousand and if the centering face is not enough, the screws might be further stressed with problem of fatigue breakage. The values (Mt-Fax-Pa-Pm) are already calculated with an in built safety coefficient which depends on the dimensions of the locking device. For a shaft with d=70mm and a hub with D=110mm and a transmissible torque value lower than, or equal to, 5600 Nm, indicate in the order: LOCKING DEVICE MAV 2005 70x110

INSTALLATION and REMOVAL instructions 2005 series INSTALLATION The designer must take into account the tolerances for the diameters required by these types of locking devices during the drawing stage of the application. Normally these are in range of H7/h7 - H11/h11. The housing in the hub must be sized so that the locking device can be contained within a margin of 1-2 mm in length, to facilitate assembly. Furthermore a centring face must be provided to allow alignment between shaft and hub, as the locking device is not self-centring. The roughness of the housings must be equal to or less than (Ra=3,2) to attain a correct friction coefficient of (μ=0,12). In the coupling calculation, the designer must also consider the fact that the locking device generates high pressures which could cause the radial deformation of the shaft or the hub. It is therefore necessary to check the tolerances for the fitting of other organs (like rolling bearings) close to the locking device to avoid any possible overloading. Before assembly the hub and shaft must be carefully cleaned and oiled. Normally the locking device is ready for use but it is suggested that it should be dismantled and cleaned to remove any excess of the protective coating used. Reassemble after oiling the rings and screws. The characteristics of the locking device and especially the friction coefficient, have been calculated for assembly with oiled parts. MOLYBDENUM BISULPHIDE BASED LUBRICANTS SHOULD NOT BE USED On re-assembling the locking device do not tighten the screws, and leave the rings loose. After fitting the hub to the shaft insert the locking device and start with a modest tightening of the screws following a crosswise pattern so that most of the play is taken up, but still leaving a small degree of freedom. At this point proceed with the accurate axial positioning of the locking device and if required with radial timing (cams, levers etc.). Continue tightening all the screws, again with a normal spanner and again following a crosswise pattern, while carrying out any checks required. When the screws are fully tightened and the assembly is locked, make a final positioning check and complete the tightening of the screws using an appropriately calibrated torque wrench. The transmissible torque is directly proportional to the sum of the pull of each screw, which depends on the tightening torque (Ma) indicated in the catalogue. At this point the installation is over. REMOVAL The tapering of this type of locking device is not self-locking therefore, after the locking screws have been loosened, a few light taps with an hammer on the heads of the screws should separate the rings almost automatically. Using MAV 2005 it might be necessary to proceed with the extraction of the so called through cone using two or three screws or threaded bars of one size larger than the locking screws, which are inserted in the holes provided for this purpose. These are indicated by the same number of screws of a different colour. The application of a light traction force, perhaps using a flange or extractor, will release this ring and completely free the elements that make up the assembly. Use of a MAV 2005 locking device to repair an assembly where the key has sheared, ruining the shaft. Turning is required to remove the seat of the key. A sleeve that has been cut lengthways is then added to return the shaft to its nominal diameter and provide the housing for the locking device in the hub. Assembly of a cylinder for a drier using a MAV 2005 locking device. The locking device allows the contemporaneous locking of the gear wheel, allowing the use of a commercial tube and by eliminating welding provides easy removal. Where long cylinders are used it is necessary to check for rotational bending. - 25 -

H h NOT SELF CENTRING LOW TORQUES flange locked on the hub inner ring flange locked on the shaft ØD Ød 3003-26 - DIMENSIONS SPECIFICATIONS X d x D h H Ca Cb Mt Fax Pa Pm 1 2 3 6 x 9 3,7 4,5 0 4 700 3,01 1 004 120 80 2 2 3 7 x 10 3,7 4,5 0 5 400 4,10 1 172 120 84 2 2 3 8 x 11 3,7 4,5 0 6 200 5,36 1 339 120 87 2 2 3 9 x 12 3,7 4,5 7 650 7 000 6,78 1 510 120 90 2 2 3 10 x 13 3,7 4,5 7 030 7 800 8,37 1 670 120 92 2 2 3 12 x 15 3,7 4,5 7 070 9 300 12,1 2 010 120 96 2 2 3 13 x 16 3,7 4,5 6 610 10 100 14,1 2 180 120 98 2 2 3 14 x 18 5,3 6,3 11 280 15 500 23,5 3 360 120 93 3 3 4 15 x 19 5,3 6,3 10 670 16 700 27,0 3 600 120 95 3 3 4 16 x 20 5,3 6,3 10 110 17 800 30,7 3 840 120 96 3 3 4 17 x 21 5,3 6,3 9 610 18 900 34,6 4 080 120 97 3 3 4 18 x 22 5,3 6,3 9 150 20 000 38,8 4 320 120 98 3 3 4 19 x 24 5,3 6,3 12 780 21 100 43,3 4 560 120 95 3 3 4 20 x 25 5,3 6,3 12 250 22 200 48,0 4 800 120 96 3 3 4 22 x 26 5,3 6,3 9 340 24 400 58,0 5 270 120 102 3 3 4 24 x 28 5,3 6,3 8 650 26 600 69,0 5 750 120 103 3 3 4 25 x 30 5,3 6,3 10 130 27 800 75,0 5 990 120 100 3 3 4 28 x 32 5,3 6,3 7 540 31 100 94,0 6 710 120 105 3 3 4 30 x 35 5,3 6,3 8 640 33 300 108 7 190 120 103 3 3 4 32 x 36 5,3 6,3 7 830 35 500 123 7 670 120 107 3 3 4 35 x 40 6,0 7,0 9 990 44 000 166 9 500 120 105 3 3 4 36 x 42 6,0 7,0 11 450 45 200 176 9 770 120 103 3 3 4 38 x 44 6,0 7,0 10 920 47 800 196 10 300 120 104 3 3 4 40 x 45 6,6 8,0 13 790 55 300 239 11 900 120 107 3 4 5 42 x 48 6,6 8,0 15 530 58 100 263 12 500 120 105 3 4 5 45 x 52 8,6 10,0 27 180 81 100 394 17 500 120 104 3 4 5 48 x 55 8,6 10,0 25 550 86 500 448 18 700 120 105 3 4 5 50 x 57 8,6 10,0 24 560 90 100 486 19 500 120 105 3 4 5 55 x 62 8,6 10,0 21 640 99 100 588 21 400 120 106 3 4 5 56 x 64 10,4 12,0 29 010 122 000 738 26 300 120 105 3 4 5 60 x 68 10,4 12,0 27 260 131 000 847 28 200 120 106 3 4 5 63 x 71 10,4 12,0 26 080 137 000 934 29 600 120 106 3 4 5 65 x 73 10,4 12,0 25 350 142 000 994 30 600 120 107 3 4 5 70 x 79 12,2 14,0 30 900 179 000 1 350 38 600 120 106 3 5 6 71 x 80 12,2 14,0 30 510 181 000 1 390 39 200 120 107 3 5 6 75 x 84 12,2 14,0 35 600 192 000 1 550 41 400 120 107 3 5 6 80 x 91 15,0 17,0 50 030 251 000 2 170 54 300 120 105 4 5 6 85 x 96 15,0 17,0 45 250 267 000 2 450 57 700 120 106 4 5 6 90 x101 15,0 17,0 42 950 283 000 2 750 61 100 120 107 4 5 6 95 x106 15,0 17,0 40 880 299 000 3 060 64 500 120 108 4 5 6 100 x114 18,7 21,0 60 460 392 000 4 230 84 600 120 105 4 6 7 110 x124 18,7 21,0 67 910 431 000 5 120 93 100 120 106 4 6 7 120 x134 18,7 21,0 62 420 470 000 6 090 102 000 120 107 4 6 7 130 x148 25,3 28,0 94 870 689 000 9 670 149 000 120 105 5 7 9 140 x158 25,3 28,0 88 710 742 000 11 220 160 000 120 106 5 7 9 150 x168 25,3 28,0 83 290 795 000 12 900 172 000 120 107 5 7 9 160 x178 25,3 28,0 78 500 848 000 14 700 183 000 120 108 5 7 9 170 x191 30,0 33,0 122 700 1 068 000 19 600 231 000 120 107 6 8 10 180 x201 30,0 33,0 116 100 1 131 000 22 000 244 000 120 107 6 8 10 190 x211 30,0 33,0 105 900 1 194 000 24 500 258 000 120 108 6 8 10 200 x224 34,8 38,0 132 400 1 458 000 31 500 315 000 120 107 6 8 11 outer ring Ca assembling load N Cb locking load N Mt transmissible torque (with Fax = 0) Nm Fax axial force (with Mt = 0) N Pa specific pressure on the shaft N/mm 2 Pm specific pressure on the hub N/mm 2 The last three columns (X) of the table, show the minimum distance (mm) between thrust flange and shaft or hub with the screws not tightened. These values depend on the number of elements used and are calculated so that once the locking is complete, a small play remains to guarantees a stable coupling. The value (X) under load must never be equal, or lower, to zero. MAV3003 locking X element is made of two rings coupled together along a tapered surface. To fit this system, user must use a flange to transmit the thrust force of the screws to the rings designed according to his own requirements. Note: if the flange is fixed to the hub, a slight axial displacement is possible when the screws are tightened. Part of the overall thrust of the screws is absorbed by the load (Ca) necessary to the elastic deformation of the rings to eliminate play caused by the coupling tolerances. This force becomes progressively more important with the reduction of the diameters, so that the smaller rings are splitted to set the value (Ca = 0). Each increase of the thrust of the screws over the value (Ca) causes an increase in the transmissible torque. Therefore two values are identified: the first (Ca) is the assembly load on the rings while the second (Cb) is the load proportional to the transmissible torque and, as consequence, to the specific pressure on the shaft (Pa). The values in the table have been calculated for a pressure of (Pa = 120 N/mm 2 ). For verification, users can look at the table relative to the relation chart (Dem/D) showed at page no.8, that has been calculated on the basis of the pressure (Pm) and a yield strength of (Rs 0,2 ). Note: it is possible to fit more elements in series to increase the transmissible torque (see page no.9).

VERIFICATIONS 7 7 7 The designer, during the design phase of the application, must take the recommended coupling tolerances into account, which influence the pre-loading of the ring 7 assembly (Ca) using the formulas: 7 7 2 2 7 d + D d 7 1) dm = 2) QIR = 7 2 d dm Cla d Clm 3) QOR = ( ) ( 1 QOR ) D 4 ) Pma = E 1 QIR 5 ) Pmm = E m D 2 d dm 2 D QOR dm 7 d 7 m dm 6) Pma Pmm Ca = Pma k 7) Pma < Pmm Ca = Pmm k 7 d D 7 7 7 where: d m = locking element average diameter mm d = locking device internal diameter mm 7 D = locking device external diameter mm P 7 ma = pressure to zero shaft play (Cla) N/mm 2 7 P mm = pressure to zero hub play N/mm 2 Cl a = overall internal ring/shaft play mm 7 Cl m = overall external ring/hub play mm E = modulus of elasticity (for steel = 206 000) N/mm 2 7 7 7 7 As can be seen the assembly pre-loading value (Ca) is calculated on the higher value between (P ma ) and (P mm ) and the form coefficient (k) which has a value of 7 1,12 up to 3003 10x13 then 1,05 up to 3003 30x35 and 1 for larger diameters. 7 7 7 7 Table 1 - Tolerances Table 2 - Moltiplication factor 7 7 INTERVAL D 3003 d 3003 d shaft D hub N. of elements 1 2 3 4 5 7 7 7 d 38 mm E7 f7 h6 H7 x Mt 1 1,56 1,86 2,03 2,13 7 d > 38 mm E8 e8 h8 H8 7 7 7 The table 1 shows the tolerances on which the calculations for the determination of the assembly pre-loading is based. The relationships that link the locking load 7 of the coupling (Cb) to the transmissible torque (Mt) and the specific pressure on the shaft or hub (Pa) and (Pm), are the following: 7 7 7 C C N d μ b b 8) N = 9 ) tanα = 0, 3 10 ) tan ς = μ = 0, 11) Mt = 7 tan( α + ς) + μ tanα + 2 μ 2 1000 7 7 7 ) Pa = N π d h 13 ) Pm = N π D h 7 7 7 where: N = radial load (N) a = angle of taper (degree) 7 7 m = frictional coefficient Mt = transmissible torque (Nm) 7 Pa = specific pressure on shaft (N/mm 2 ) Pm = specific pressure on hub (N/mm 2) 7 7 7 Should it be necessary to use several locking elements in series it must be kept in mind that the resulting transmissible torque (Mt) is not directly proportional to 7 the number of elements as the load (Cb) falls progressively due to the friction generated by each ring. The value of the resulting transmissible torque is calculated 7 7 using the following formula which demonstrates that it is does not make economic sense to couple more than three or four elements: 7 Q 7 9 1 tanα 14) 0W = 0W 15) 9 = U 7 9 1 tanα + 2 μ 7 7 Assembly operations involve the same procedures used for normal locking devices. Prepare the housing in the hub and shaft and check that the roughness is not 7 greater than (Ra=0,8) so that the friction coefficient is not modified to any great extent. Carefully clean and oil and then proceed with the assembly of the parts, 7 tightening the bolts in a crosswise pattern. Final tightening of the bolts must be made using an appropriately calibrated torque wrench so that the loads (Ca) and 7 7 (Cb) are respected. A further check must be made regarding the distance (X) between the flange and the hub or shaft. This distance must never be equal to zero 7 or be reduced to a very small value. The value of the locking torque depends on the type and number of screws used and therefore on the sum of the single load 7 7 of each bolt from which is subtracted the load necessary for the ring assembly. The table at page no.9 groups together the single load values for three types of screw 7 TCCE UNI 5931 - DIN 912, assuming an assembly with oiled screws with a friction coefficient of 0,14. 7 7 16) Cb = n Cu Ca 7 7 7 where: Cb = locking load (N) Cu = unitary force of the screw (N) Ca = assembling load (N) Application of a labyrinth seal on grinding machine shaft using MAV 3003 locking elements. Assembly and positioning are made much easier. Locking of the seal and flange of a pneumatic cylinder using MAV 3003 locking elements. The hole of the flange and the end of the shaft must be coupled accurately. The rings of the locking element are cut to fully exploit their expansion capacity.

MAV 2008-2108 - 2208 series Provide an high capacity mechanical interference fit with all the positive features of conventional interference fits, but eliminating installation and removal problems. Permit simple axial and angular hub timing. Offer extremely concentric and well balanced connections ideal for high speed applications. Available in light, medium and heavy duty series to meet any requirement with just a single unit. MAV 1204 series NEW! Rigid coupling for shaft to shaft connections. Compact design. High transmissible torque values. Possibility of connection of shafts of different diameters. Easy and fast installation and removal operations. MAV 1004 series Rigid coupling for shaft to shaft connections. Possibility of connection of shafts of different diameters. Easy and fast installation and removal operations. SHRINK DISCS - OUTER CLAMPING DEVICES - RIGID COUPLINGS This family of MAV devices did born to connect two shafts: MAV2008, MAV2108 and MAV2208 series provide locking between a standard shaft and an hollow shaft. The main applications for these series are in the field of gear-boxes, speed-reducers, etc. The operation of the MAV2008, MAV2108, MAV2208, MAV1204 and MAV1004 series of locking devices, which is based on heat shrink-fit principles, exploits the pressure in the hollow shaft interface generated by the coupling of the conical cones which are assembled through the bolts. All these devices consist of a set of bolts, one front cone, one rear cone and one inner ring.

NEW! RIGID COUPLING HIGH TORQUES ØD ØIv Ød class 10.9 DIN931 - UNI5737 inner ring rear cone d x D DIMENSIONS H2 H3 H4 H1 SCREWS SPECIFICATIONS H1 H2 H3 H4 I v n. Size Ma Mt Fax 15 x 52 14 6 34 38 35 3 M6 12 160 22 226 266 16 x 52 14 6 34 38 35 3 M6 12 170 22 212 266 19 x 52 14 6 34 38 35 3 M6 12 205 22 178 266 20 x 60 16 8 40 44 41 5 M6 12 360 36 240 334 22 x 60 16 8 40 44 41 5 M6 12 400 36 216 334 24 x 60 16 8 40 44 41 5 M6 12 435 36 200 334 25 x 66 18 8 44 48 48 7 M6 12 630 51 245 381 28 x 66 18 8 44 48 48 7 M6 12 710 51 219 381 29 x 66 18 8 44 48 48 7 M6 12 735 51 211 381 30 x 76 20 8 48 52 54 8 M6 12 870 58 213 342 32 x 76 20 8 48 52 54 8 M6 12 925 58 200 342 35 x 76 20 8 48 52 54 8 M6 12 1 020 58 183 342 36 x 96 23 10 56 62 67 7 M8 30 1 750 97 257 393 40 x 96 23 10 56 62 67 7 M8 30 1 950 97 231 393 44 x 96 23 10 56 62 67 7 M8 30 2 140 97 210 393 50 x 112 28 12 68 74 80 10 M8 30 3 480 139 217 402 51 x 112 28 12 68 74 80 10 M8 30 3 550 139 213 402 54 x 112 28 12 68 74 80 10 M8 30 3 760 139 201 402 55 x 120 33 12 78 84 89 12 M8 30 4 600 167 207 395 60 x 120 33 12 78 84 89 12 M8 30 5 010 167 189 395 63 x 120 33 12 78 84 89 12 M8 30 5 260 167 180 395 65 x 148 38 12 88 95 106 12 M10 60 8 620 265 245 433 68 x 148 38 12 88 95 106 12 M10 60 9 040 265 234 433 70 x 148 38 12 88 95 106 12 M10 60 9 270 265 228 433 73 x 148 38 12 88 95 106 12 M10 60 9 670 265 219 433 74 x 170 43 18 104 112 126 10 M12 100 11 650 315 217 403 76 x 170 43 18 104 112 126 10 M12 100 11 990 315 211 403 80 x 170 43 18 104 112 126 10 M12 100 12 590 315 201 403 85 x 170 43 18 104 112 126 10 M12 100 13 380 315 189 403 86 x 185 49 18 116 124 138 12 M12 100 16 200 378 201 395 90 x 185 49 18 116 124 138 12 M12 100 17 000 378 192 395 92 x 185 49 18 116 124 138 12 M12 100 17 400 378 188 395 96 x 185 49 18 116 124 138 12 M12 100 18 100 378 180 395 100 x 197 54 18 126 134 149 15 M12 100 23 600 472 199 430 106 x 197 54 18 126 134 149 15 M12 100 25 000 472 188 430 108 x 197 54 18 126 134 149 15 M12 100 25 500 472 184 430 110 x 197 54 18 126 134 149 15 M12 100 26 000 472 181 430 MAV can supply MAV1204 and MAV1004 rigid coupling series in larger or intermediate sizes to those shown in this catalogue, as well as couplings according to clients specifications. Pa s e front cone checked. The screws should not tighten further. If this is not the case repeat the operation from point no.4. 1204 Ma screw tightening torque Nm Mt transmissible torque (with Fax=0) Nm Fax axial force (with Mt=0) kn Pa specific pressure on the shaft N/mm 2 s e equivalent stress on the outer ring N/mm 2 The rigid coupling MAV1204 represents an evolution of the series MAV1004 (see page no.34). It is a rigid coupling used to couple two shafts of equal or differing diameters. The main advantages of this series versus the previously designed MAV1004 are: - More compact design (therefore smaller dimensions and masses). - For the same shaft diameter the transmissible torques are higher (between 70% and 400% more capacity). - Locking through hexagonal head screws (DIN931- UNI5737) allows smaller access room and radial access is possible. By modifying the internal ring in the appropriate manner (special rigid coupling, with availability and prices on request), or if the end user adds a reduction sleeve, it is possible to connect shafts that have different diameters. This further increases the application of this coupling. In this case, it must be taken into account that the transmissible torque is directly proportional to the smaller diameter of the two shafts. Once again we stress the importance to check the final torque setting of the screws, upon which the final capacity of the connection depends. INSTALLATION 1 - Before assembly ensure that the tolerances of the two shafts, which must fall within the range h7 - h9, are not too dissimilar. 2 - Carefully clean the parts which should then be light-ly oiled. It is recommended that MOLYBDENUM BISULPHIDE based products are not used to lubricate the shafts. 3 - Assemble the parts paying attention to the alignment of the shafts and the necessity of any angular timing. 4 - Tighten the screws cross-wise using a normal spanner and at the same time check the parallelism of the rings. 5 - The last two passes should be done clockwise or anticlockwise using a torque wrench calibrated at 3-4% more than the torque shown in the catalogue. The torque should later be set to the correct value and the tightness of each bolt REMOVAL: Loosen the screws by three or four turns only. DO NOT remove locking screws completely. The rings should now separate if they are assisted by light taps with an hammer. - 29 -

X H2 H1 e SHRINK DISC STANDARD SERIES tolerance h8 rear cone ØD ØIv Ød Ød 1 Ød alb class 10.9 DIN931 - UNI5737 2008-30 - DIMENSIONS H3 H4 SCREWS SPECIFICATIONS front cone d alb d x D H1 H2 H3 H4 Iv d 1 e n. Size Ma X Mt Fax Pm P alb 19 200 21 151 280 20 24 x 50 14 18 7,8 22,0 36 26 2 6 M5 4 18 250 25 176 280 21 310 30 202 280 24 310 26 127 229 25 30 x 60 16 20 8,5 24,0 44 32 2 7 M5 4 18 370 30 144 229 26 440 34 160 229 28 720 51 188 297 30 36 x 72 18 22 9,5 26,0 52 38 2 5 M6 12 18 910 61 214 297 31 940 60 210 297 34 1 160 68 180 306 35 44 x 80 20 24 10,5 28,0 61 47 2 7 M6 12 18 1 290 73 192 306 36 1 420 79 204 306 38 1 440 75 161 280 40 50 x 90 22 26 11,5 30,0 70 53 2 8 M6 12 18 1 730 86 179 280 42 2 050 97 199 280 42 1 580 75 137 243 45 55 x 100 23 29 12,5 33,0 75 58 3 8 M6 12 18 2 030 90 160 243 48 2 550 100 184 243 48 2 550 100 167 270 50 62 x 110 23 29 12,5 33,0 86 66 3 10 M6 12 18 2 910 110 181 270 52 3 090 110 182 270 50 2 350 90 135 246 55 68 x 115 23 29 12,5 33,0 86 72 3 10 M6 12 18 2 970 100 151 246 60 4 060 130 185 246 55 3 370 120 147 276 60 75 x 138 25 31 13,0 36,5 100 79 3 7 M8 30 26 4 540 150 176 276 65 5 880 180 206 276 60 3 890 120 142 259 65 80 x 145 25 31 13,0 36,5 100 84 3 7 M8 30 26 5 100 150 168 259 70 6 470 180 196 259 60 5 180 170 156 290 65 85 x 155 30 38 16,5 43,5 114 94 4 10 M8 30 26 6 690 200 180 290 70 8 400 240 205 290 65 5 910 180 152 274 70 90 x 155 30 38 16,5 43,5 114 94 4 10 M8 30 26 7 470 210 174 274 75 9 200 240 196 274 65 6 400 190 144 274 70 95 x 170 34 43 19,0 48,5 124 104 5 12 M8 30 26 8 100 230 164 274 75 10 000 260 184 274 70 7 300 200 141 261 75 100 x 170 34 43 19,0 48,5 124 104 5 12 M8 30 26 9 000 240 158 261 80 11 000 270 177 261 70 7 700 220 129 253 75 105 x 185 39 49 21,5 56,0 136 114 5 9 M10 59 29 9 600 250 145 253 80 11 700 290 162 253 75 8 700 230 127 242 80 110 x 185 39 49 21,5 56,0 136 114 5 9 M10 59 29 10 600 260 142 242 85 11 800 270 144 242 80 11 100 270 140 250 85 115 x 200 40 50 22,0 57,0 150 124 5 10 M10 59 29 12 100 280 140 250 90 14 600 320 157 250 85 10 900 250 122 240 90 120 x 200 40 50 22,0 57,0 150 124 5 10 M10 59 29 13 300 290 137 240 95 15 900 330 152 240 inner ring Ma screw tightening torque Nm Mt transmissible torque (with Fax=0) Nm Fax axial force (with Mt=0) kn Pm specific pressure on the hub N/mm 2 Palb specific pressure on the shaft N/mm 2 X clearance for torque wrench mm Pressure value (P alb ) is calculated using a number of known parameters as follow detailed: - the taper of the connection. - The friction coefficient between the rings with contact surfaces lubricated using molibdenum disulphide based products. - The sum of the traction force on the bolts, tightened to the torque value shown in the catalogue and lubricated using Molikote BR2 type grease in order to get a friction coefficient value lower than 0,1. - The force necessary to eliminate play in the connection between the shaft and hollow shaft, taking into consideration that the contact surfaces must have a total roughness (Rt) that is not more than 0,016mm. Given the value of (P alb ) the value of the transmission moment (Mt) and axial force (Fax) are calculated. The friction coefficient between the shaft and hollow shaft which are calculated as being equal to or over 0,15 (steel on steel). The designer must take into account the forces to which the shafts are subject, as well as the forces generated by the transmission of the torsional moment, with the possible co-presence of axial forces or bending moments and also the pressure that determines the locking of the elements. NOTE: The values Mt and Fax shown on Shrink Discs charts, refers to the maximum clearances admitted as per table at top page no.31. The values (Mt and Fax) increase as much as the respected tolerances are closer. MAV can manufacture all Shrink Discs series in larger or intermediate sizes to those shown in the catalogue, as well as coupling flanges according to customers specifications.

ORDER EXAMPLE For a shaft diameter dalb= 95mm the outer diameter of the hollow shaft will be 130mm, therefore the required clamping will be ordered as: MAV 2008 130x215 Toll/2 Dd / 2 INSTALLATION MAV Shrink Discs series must not be dismantled before use to ensure that the grease used to lubricate the friction surfaces and the bolts is not removed. It is sufficient to clean the internal ring bore of any traces of grease. If it is necessary to dismantle the Shrink Discs or re-use it after servicing the connection, it is necessary to replace the layer of grease using one of the following products to avoid changing in calculated coefficients: Molikote 321 R or Molikote G Rapid and, for the bolts Molikote BR2. Before assembling the parts, the operator must carefully clean and degrease the bore of the hollow shaft and the surface of the shaft using a normal solvent. At this stage the Shrink Disc is positioned and the shaft inserted, being careful not to use too much force to avoid causing a possible seizure. Bolt tightening takes place in two stages: first tighten three or four equally spaced bolts to about half the torque values shown in the catalogue in order to verify that front and rear collars remain concentric and parallel, then tighten all the bolts to the torque values reccomended in a cross pattern. Once the bolts are tightened check the parallelism of the two collars, considering that the maximum error allowed is 0,25-0,35% of the external diameter of the Shrink Discs to avoid distorting the connection angle thereby risking further displacement of the rings with a loss of specified pressure (P alb ) and, as a consequence, a reduction in the (Mt) and (Fax) values. By following this advice and carefully assembling the discs, it is possible to achieve coupling of excellent quality, without eccentricity or vibration and good power transmission characteristics wherever it is necessary to use hollow shafts or thin walled hubs. REMOVAL Leaving three or four bolts in place unscrew and remove the others. Unscrew the remaining bolts in a crosswise pattern ensuring that the two collars separate progressively and parallelely until it is free. Remove the shaft from the hub and free the hub and the Shrink Disc. NOTE: all MAV Shrink Discs are white Zink-plated and feature (starting from diameter 140mm) a rubber O-ring between the two cones. from mm DIMENSIONS d alb to mm ISO Tolerances Maximum clearance mm 18 30 H6 - j6 0,017 31 50 H6 - h6 0,032 51 80 H6 - g6 0,048 81 120 0,069 121 180 0,079 H7 - g6 181 250 0,090 251 315 0,101 SCREWS 2008 SPECIFICATIONS d alb d x D H1 H2 H3 H4 Iv d 1 e n. Size Ma X Mt Fax Pm P alb 85 12 700 290 132 263 90 125 x 215 42 52 23,0 59,0 160 134 5 12 M10 59 29 15 300 340 147 263 95 18 100 380 161 263 90 14 000 310 130 253 95 130 x 215 42 52 23,0 59,0 160 134 5 12 M10 59 29 16 700 350 144 253 100 19 600 390 157 253 95 17 900 370 135 259 100 140 x 230 46 58 25,0 66,0 175 145 6 10 M12 100 34 20 900 410 147 259 105 24 200 460 159 259 105 24 500 460 139 259 110 155 x 263 50 62 26,0 70,0 192 165 6 12 M12 100 34 28 200 510 149 259 115 32 100 550 160 259 115 38 000 660 164 278 120 165 x 290 56 68 29,0 78,0 210 175 6 8 M16 250 36 42 700 710 174 278 125 46 700 740 180 278 125 41 900 670 154 262 130 175 x 300 56 68 29,0 78,0 220 185 6 8 M16 250 36 46 900 720 163 262 135 52 200 770 172 262 135 58 700 860 153 244 140 185 x 330 71 85 36,0 95,0 236 195 7 10 M16 250 36 65 100 930 161 244 145 71 900 990 170 244 140 74 000 1 060 177 278 150 195 x 350 71 85 36,0 95,0 246 206 7 12 M16 250 36 89 000 1 190 193 278 155 97 000 1 250 201 278 150 85 000 1 140 181 271 155 200 x 350 71 85 36,0 95,0 246 206 7 12 M16 250 36 93 000 1 200 189 271 160 101 000 1 270 197 271 160 108 000 1 350 164 249 165 220 x 370 88 104 45,0 114,0 270 226 8 15 M16 250 36 117 000 1 430 170 249 170 127 000 1 500 177 249 170 143 000 1 680 179 273 180 240 x 405 92 108 47,0 121,0 295 248 8 12 M20 490 54 166 000 1 840 191 273 190 187 000 1 970 200 273 190 194 000 2 040 178 262 200 260 x 430 103 120 53,0 133,0 321 268 8 14 M20 490 54 221 000 2 210 188 262 210 251 000 2 390 200 262 210 257 000 2 440 177 252 220 280 x 460 114 132 58,0 145,0 346 288 9 16 M20 490 54 289 000 2 630 187 252 230 324 000 2 810 197 252 230 330 000 2 870 180 247 240 300 x 485 122 140 63,0 153,0 364 308 9 18 M20 490 54 367 000 3 060 188 247 250 406 000 3 250 197 247 240 375 000 3 120 183 257 250 320 x 520 122 140 63,0 153,0 386 328 9 20 M20 490 55 415 000 3 320 191 257 260 453 000 3 480 198 257 250 460 000 3 680 185 260 260 340 x 570 136 156 72,0 169,0 408 348 10 24 M20 490 56 501 000 3 850 191 260 270 550 000 4 070 198 260 280 551 000 3 930 176 239 290 360 x 590 140 160 73,0 173,0 432 368 10 24 M20 490 57 601 000 4 140 183 239 295 627 000 4 250 187 239 290 678 000 4 670 194 264 300 380 x 645 144 164 76,0 179,0 458 388 10 20 M24 840 58 735 000 4 900 200 264 310 796 000 5 130 208 264-31 -

2108 2208-32 - LIGHT DUTY SERIES HEAVY DUTY SERIES DIMENSIONS DIMENSIONS SCREWS SCREWS SPECIFICATIONS d alb d x D H1 H2 H3 H4 Iv d 1 e n. Size Ma X Mt Fax Pm P alb 95 10 600 225 99 184 100 125 x 190 40 52 22 59 158 130 6 8 M10 59 29 12 800 258 111 184 105 15 300 292 125 184 110 18 200 331 126 206 120 140 x 220 40 52 22 59 175 145 6 10 M10 59 29 23 900 399 149 206 125 26 700 428 160 206 130 30 100 464 154 223 135 155 x 245 40 52 22 59 192 160 6 12 M10 59 29 33 700 500 166 223 140 37 600 537 179 223 135 36 300 539 149 220 140 165 x 260 46 62 26 70 210 170 8 10 M12 100 34 40 500 579 159 220 145 44 800 619 170 220 145 40 000 552 142 207 150 175 x 275 46 62 26 70 220 180 8 10 M12 100 34 44 200 590 152 207 155 48 700 629 162 207 155 53 900 697 168 235 160 185 x 295 46 62 26 70 225 190 8 12 M12 100 34 58 900 737 177 235 165 64 100 777 188 235 165 73 300 889 171 229 170 195 x 315 56 72 31 80 237 200 8 15 M12 100 36 79 500 936 180 229 175 86 100 984 189 229 180 99 800 1 109 185 260 190 220 x 345 66 84 36 94 265 225 9 10 M16 250 36 111 800 1 177 171 221 200 128 600 1 287 186 221 200 135 700 1 357 179 243 210 240 x 370 66 84 36 94 290 245 9 12 M16 250 54 154 200 1 469 193 243 215 164 000 1 526 201 243 220 153 000 1 392 167 224 230 260 x 395 74 92 40 102 310 265 9 12 M16 250 54 170 400 1 482 161 200 235 180 500 1 536 167 200 230 207 300 1 803 180 248 240 280 x 425 84 104 46 114 333 285 10 16 M16 250 54 228 300 1 903 171 218 250 253 600 2 030 181 218 250 258 900 2 071 172 229 260 300 x 460 84 104 46 114 358 305 10 18 M16 250 54 283 700 2 183 181 229 270 312 500 2 315 192 229 SPECIFICATIONS d alb d x D H1 H2 H3 H4 Iv d 1 e n. Size Ma X Mt Fax Pm P alb 85 18 700 442 161 297 90 125 x 215 54 66 28 74 160 131 6 12 M12 100 34 22 500 500 177 297 95 26 600 560 193 297 95 19 800 417 122 239 100 140 x 230 60 74 32 82 175 145 7 12 M12 100 34 23 500 472 134 239 105 27 600 527 146 239 105 29 000 553 133 245 110 155 x 263 66 80 35 88 198 165 7 15 M12 100 34 33 600 612 143 245 115 38 500 671 154 245 115 45 800 800 163 270 120 165 x 290 72 88 38 98 210 175 8 10 M16 250 36 51 900 870 173 270 125 58 300 930 183 270 125 52 200 840 157 255 130 175 x 300 72 88 38 98 220 185 8 10 M16 250 36 58 500 900 166 255 135 65 100 970 175 255 135 89 400 1 330 189 283 140 185 x 330 92 112 50 122 236 195 10 15 M16 250 36 99 000 1 410 198 283 145 109 100 1 510 207 283 145 94 900 1 310 171 262 150 200 x 350 92 112 50 122 246 206 10 15 M16 250 36 104 400 1 390 179 262 155 114 300 1 480 186 262 160 142 900 1 790 175 256 165 220 x 370 114 134 60 144 270 226 10 20 M16 250 36 155 500 1 890 181 256 170 168 600 1 980 187 256 170 174 500 2 050 176 261 180 240 x 405 120 144 65 159 295 248 12 15 M20 490 54 203 100 2 260 188 261 190 234 100 2 460 199 261 190 244 600 2 580 178 255 200 260 x 430 136 160 72 175 321 268 12 18 M20 490 54 280 500 2 810 189 255 210 319 000 3 040 199 255 210 315 000 3 000 175 242 220 280 x 460 148 172 78 187 346 288 12 20 M20 490 54 356 100 3 240 184 242 230 400 000 3 480 193 242 230 356 100 3 100 161 220 240 300 x 485 152 176 80 191 364 308 12 20 M20 490 54 398 600 3 320 169 220 245 420 800 3 440 173 220 POSSIBLE HUB CONFIGURATIONS FOR THE AXIAL POSITIONING OF THE SHRINK DISC. Quite often axial positioning of the Shrink Disc needs to be precise, taking into consi deration that the height (H2 and H4) are calculated with a 5% approximation. In this case the hollow shaft must present shoulders to support the Shrink Disc, while ensuring that they do not cause sharp variations in the cross section of the shaft that would run the risk of fatigue failure. The example beside (right) make several suggestions that could be useful for the designer. NOTE: all MAV Shrink Discs are white Zink-plated and mount (starting from diameter 140mm) a rubber O-ring between the two rings. PRESSURE DISTRIBUTION ON DIAMETER (d alb ) The drawing below provides an indication of the effective distribution of contact pressure on the shaft. This indication is also particularly useful in cases where the shaft is hollow and deformation must be calculated. Theoretically the hollow shaft could block the counter shaft: the effective pressure on (dalb) is useful for the calculation of the resulting twisting moment.

SPLIT (Shrink Disc) CONFIGURATION This Shrink Disc configuration is of interest in applications where length of hub projection is insufficient to accomodate standard Shrink Discs. Since two hub projections are available for torque transmission, a "thinner" hub together with a Shrink Disc smaller than required for standard applications may be selected. By using only one outer collar and a corresponding half inner ring of a SPLIT Shrink Disc offers substantial cost reductions in low torque applications. To order SPLIT Shrink Disc simply add suffix "SPLIT" to Shrink Disc designation and specify web thickness "Z" to provide for proper screw length (screws are normally supplied by MAV, upon request). 2008 SPLIT d x D L Iv d 1 e a R 24 x 50 7,0 36 26 2 2,5 2,0 30 x 60 8,0 44 32 2 2,5 2,0 36 x 72 9,0 52 38 2 2,5 2,0 44 x 80 10,0 61 47 2 2,5 2,0 50 x 90 11,0 75 53 2 2,5 2,0 55 x 100 11,5 75 58 3 2,5 2,0 62 x 110 11,5 86 66 3 2,5 2,0 68 x 115 11,5 86 72 3 2,5 2,0 75 x 138 12,5 100 79 3 5,0 4,5 80 x 145 12,5 100 84 3 5,0 4,5 85 x 155 15,0 114 94 4 5,0 4,5 90 x 155 15,0 114 94 4 5,0 4,5 95 x 170 17,0 124 104 5 5,0 4,5 100 x 170 17,0 124 104 5 5,0 4,5 105 x 185 19,5 136 114 5 5,0 4,5 110 x 185 19,5 136 114 5 5,0 4,5 115 x 200 20,0 150 120 5 5,0 4,5 120 x 200 20,0 150 124 5 5,0 4,5 125 x 215 21,0 160 134 5 5,0 4,5 130 x 215 21,0 160 134 5 5,0 4,5 140 x 230 23,0 175 145 6 5,0 4,5 155 x 263 25,0 192 165 6 5,0 4,5 165 x 290 28,0 210 175 6 5,0 4,5 175 x 300 28,0 220 185 6 5,0 4,5 185 x 330 35,5 236 195 7 5,0 4,5 195 x 350 35,5 246 206 7 5,0 4,5 200 x 350 35,5 246 206 7 5,0 4,5 220 x 370 44,0 270 226 8 7,5 7,0 240 x 405 46,0 295 248 8 7,5 7,0 260 x 430 51,5 321 268 8 7,5 7,0 280 x 460 57,0 346 288 9 10,0 9,5 300 x 485 61,0 364 308 9 10,0 9,5 320 x 520 61,0 386 328 9 10,0 9,5 340 x 570 68,0 408 348 10 10,0 9,5 360 x 590 70,0 432 368 10 10,0 9,5 380 x 645 72,0 458 388 10 10,0 9,5 e ØIv 2108 SPLIT d x D L Iv d 1 e a R 125 x 190 20,0 158 130 6 5,0 4,5 140 x 220 20,0 175 145 6 5,0 4,5 155 x 245 20,0 192 160 6 5,0 4,5 165 x 260 23,0 210 170 8 5,0 4,5 175 x 275 23,0 220 180 8 5,0 4,5 185 x 295 23,0 225 190 8 5,0 4,5 195 x 315 28,0 237 200 8 5,0 4,5 220 x 345 33,0 265 225 9 5,0 4,5 240 x 370 33,0 290 245 9 7,5 7,0 260 x 395 37,0 310 265 9 7,5 7,0 280 x 425 42,0 333 285 10 7,5 7,0 300 x 460 42,0 358 305 10 7,5 7,0 320 x 495 42,0 378 325 11 7,5 7,0 340 x 535 42,0 402 345 11 7,5 7,0 a L Z L 2208 SPLIT d x D L Iv d 1 e a R 125 x 215 27,0 160 131 6 5,0 4,5 140 x 230 30,0 175 145 7 5,0 4,5 155 x 263 33,0 198 165 7 5,0 4,5 165 x 290 36,0 210 175 8 5,0 4,5 175 x 300 36,0 220 185 8 5,0 4,5 185 x 330 46,0 236 195 10 5,0 4,5 200 x 350 46,0 246 206 10 7,5 7,0 220 x 370 57,0 270 226 10 7,5 7,0 240 x 405 60,0 295 248 12 7,5 7,0 260 x 430 68,0 321 268 12 7,5 7,0 280 x 460 74,0 346 288 12 10,0 9,5 300 x 485 76,0 364 308 12 10,0 9,5 320 x 520 80,0 386 328 12 10,0 9,5 340 x 570 88,0 420 348 12 10,0 9,5 SPLIT VERSIONS The use of Shrink Disc SPLIT on a large welded pulley. Excellent torque transmission and high resistance to bending moments. R > e LOCATION AGAINST THE HUB FACE This configuration (except in light duty applications with 2108 where a simple relieve radius of R=e is enough) requires a hub undercut with R>e for smooth hub transition. R a e SPLIT For the transmission of medium to low torque, it is convenient to use half of a SPLIT Shrink Disc which gives excellent characteristics of concentricity. ORDER EXAMPLE For a shaft diameter dalb= 95mm the outer diameter of the hollow shaft will be 130mm, therefore, considering the dimension Z=20mm, the required clamping element will be ordered as: MAV 2008 SPLIT 130x215, 20-33 -

H4 H3 H2 H1 RIGID COUPLING MEDIUM TORQUES rear cone class 12.9 DIN912 - UNI5931 inner ring ØIv Ød ØD 1004 DIMENSIONS SCREWS SPECIFICATIONS d x D H1 H2 H3 H4 I v n. Size Ma Mt Fax Pa 15 x 45 17 16 50 56 33 4 M 6 17 140 19 285 316 16 x 45 17 16 50 56 33 4 M 6 17 160 20 267 316 17 x 45 17 16 50 56 33 4 M 6 17 180 21 251 316 18 x 50 17 16 50 56 36 4 M 6 17 180 20 237 285 19 x 50 17 16 50 56 36 4 M 6 17 200 21 225 285 20 x 50 17 16 50 56 36 4 M 6 17 220 22 213 285 22 x 55 20 20 60 66 42 6 M 6 17 320 29 247 338 24 x 55 20 20 60 66 42 6 M 6 17 390 32 227 338 25 x 55 20 20 60 66 42 6 M 6 17 420 33 218 338 28 x 60 20 20 60 66 48 6 M 6 17 440 31 194 325 30 x 60 20 20 60 66 48 6 M 6 17 500 34 181 325 32 x 65 20 20 60 66 50 6 M 6 17 540 34 170 295 35 x 75 23 29 75 83 62 4 M 8 41 570 32 146 253 38 x 75 23 29 75 83 62 4 M 8 41 670 35 134 253 40 x 75 23 29 75 83 62 4 M 8 41 740 37 128 253 42 x 78 23 29 75 83 64 4 M 8 41 780 37 121 244 45 x 85 26 33 85 93 68 6 M 8 41 1 260 56 150 292 48 x 90 26 33 85 93 73 6 M 8 41 1 310 55 141 285 50 x 90 26 33 85 93 73 6 M 8 41 1 420 57 135 285 55 x 95 26 33 85 93 78 8 M 8 41 2 110 77 164 371 60 x 100 26 33 85 93 83 8 M 8 41 2 330 78 150 364 65 x 105 26 33 85 93 88 8 M 8 41 2 550 78 139 358 68 x 115 30 40 100 110 97 6 M 10 83 3 180 94 142 341 70 x 115 30 40 100 110 97 6 M 10 83 3 370 96 138 341 75 x 120 30 40 100 110 102 6 M 10 83 3 640 97 128 336 80 x 125 30 40 100 110 107 8 M 10 83 5 220 130 161 442 85 x 130 30 40 100 110 112 8 M 10 83 5 570 131 151 437 90 x 135 30 40 100 110 117 8 M 10 83 5 930 132 143 433 s e front cone Ma screw tightening torque Nm Mt transmissible torque (with Fax=0) Nm Fax axial force (with Mt=0) kn Pa specific pressure on the shaft N/mm 2 s e equivalent stress on the outer ring N/mm 2 MAV 1004 coupling is a good alternative to those which, like the shell system, have already been on the market for some time. This system exploits all the advantages of Shrink Discs. Even in this case the transmissible torque depends on the pressure exercised by the cones which are coupled to the inner ring by a low degree tapering. It is most important to check the torque setting of the screws, on which will depend the performances of the rigid coupling. In favour of this type of coupling are several interesting characteristics such as the high transmissible torque in relation to the number of screws, low weight and small size and easy installing and removal operations. It is most important that between the two joined shafts there is zero misalignment, both angular and assial. Where the transmissible torque is particularly high, or in case of shaft bending moments, or in case of coupling of large shafts, it is recommended that use be made of sleeves that are locked onto the shaft by two Shrink Discs. By modifying the inner ring in the appropriate way (special rigid coupling, availability and prices on request), or adding a reduction sleeve, it is possible to connect two shafts of different diameters (see below sketch). In this case it must be taken into account that the transmissible torque is directly proportional to the smaller diameter of the two shafts. Due to the high stress to which the external rings are subject, MAV manufactures them by heat treated compound steel. Any other solution should be treated with caution. INSTALLATION 1- Before assembly ensure that the tolerances of the two shafts, which must fall within the range h7 - h9, are not too dissimilar. 2- Carefully clean the parts which should then be light-ly oiled. It is recommended that MOLYBDENUM BISULPHIDE based products are not used to lubricate the shafts. 3- Assemble the parts paying attention to the alignment of the shafts and the necessity of any angular timing. 4- Tighten the screws cross-wise using a normal spanner and at the same time check the parallelism of the rings. 5- The last two passes should be done clockwise or anti-clockwise using a torque wrench calibrated at 3-4% more than the torque shown in the catalogue. The torque should later be set to the correct value and the tightness of each bolt checked. The screws should not tighten further. If this is not the case repeat the operation from point 4. connecting two shafts of different diameters: see above description. - 34 - REMOVAL Loosen the screws by three or four turns. The rings should now separate if they are assisted by light taps with an hammer.