Servo couplings General... Dimensioning... Formulas... Installation instructions...

Transcription

1 SERVO COUPLINGS

2 General... Dimensioning... Formulas... Installation instructions... Metal bellows Technical... KM... KP... KPS... KR... KSD... KSS... KPP... KG / KG-VA... KXL... Special series... Elastomer General... Selection procedure... Installation instructions... EKM... ESM / ESM-A... EKS... Special series... Miniature MKM... MKP... MKA... MJT / MJT-C... MOS... MOL... Distance General... Assembly... intermediate pipie... EKZ... WD... WDA / / / / 19 /

3 Definition - servo : General are compensating with a backlash free and conformal torque transfer providing high torsional stiffness and a low moment of inertia. According to these requirements, JAKOB metal bellow can be regarded as the ideal solution. For more than 25 years, they have proven themselves in thousands of servo drives as being excellent. Elastomer with a flexible polyurethan-spider can also represent a perfect alternative for different applications because of their product-specific advantages. All JAKOB servo have one thing in common, they are all backlash free (also shaft-hub-connection) and flexible to allow the compensation of shaft misalignments. Because of the unique characteristics of the different series, the designer will (almost) always find the best solution within the large-scale JAKOB coupling program. The area of application ranges from highly dynamic feed drives of the axis in machine tools to high performance drives in the general machine tool design. Characteristics - JAKOB servo : absolutely backlash free, exact torque transfer low moment of inertia - high balancing quality excellent operational characteristics - high speed compensation of shaft misalignments - low restoring forces frictional, easy to fit shaft-hub-connection metal bellow: max. torsional rigidity, wear free, up to 300 C elastomer spider: plug-in, oscillation dampening, up to 120 C compact - flexible areas of applications large number of types and sizes available (modular system) precise production - best quality - long life The JAKOB modular system: As flexible compensating parts, stainless steel bellows are used in different forms as well as polyurethane spiders with different shore hardnesses, oldham- type spacer as polyacetal and stainless steel membrane hubs. Another important aspect is the kind of connection between the driven shafts resp. primary shafts and the coupling hubs. Several versions of backlash free frictional clamping hubs or conical hubs are available. In the following, the most important and widely used series of compensating elements and kinds of hubs, derived from the numerous possibilities of combinations, are described in this catalogue. A well-contrived modular system, which provides multiple use of many parts, enables production in cost-effective batch sizes and very short delivery period. The JAKOB coupling program is devided into the following four main groups: Metal bellow Elastomer Miniature Distance with intermediate pipe For decades, the centre of the JAKOB coupling program has been a large variety of different metal bellow. 2

4 Technical information - definitions / details: Dimensioning Nominal torque of the coupling: T KN - [ Nm ] The nominal torque of the coupling defines the max. load of the prolonged alternating-stress strength. If in normal operation T KN is not exceeded, an infinite number of operation cycles can be carried out (see "useful life of the coupling"). Moment of inertia: J K - [ 10-3 kgm 2 ] The values for the moment of inertia are defined for medium hub- bores in the given diameter range Dmin/Dmax. Conversion: [ kgcm 2 ] = [10-4 kgm 2 ] Torsional rigidity: C TK - [ Nm / arc min ] The values for the specific torsional rigidity of all and gear series are converted from the existing values [103 Nm/rad] to "Newtonmeter per angular minute". This enables the constructor to determine the twisting angle failure quite easily (see "b" below) under consideration of the operating torque. 60 angular minutes (resp. arc minutes) correspond to one angular degree. ^ ^ This defines the conversion factor 1 rad = 57,3 = 3438 arcmin. Conversion: [10 3 ^ ^ Nm/rad = 0,291 Nm/arcmin] resp. [1Nm/arcmin = 3438 Nm/rad] ^ Example: Size KM 170: 17,5 Nm/arcmin= 60 knm/rad Max. alignment of shafts: [ mm ] The maximum alignment of shafts is the largest allowed misalignment between drive shaft and output shaft, which results from the calculation of the prolonged alternating-stress strength for compensating elements. If the allowed displacement values are not exceeded, an infinite number of load alternations can be carried out. In exceptional cases (e.g. during fixing) resp. at reduced numbers of load alternations, the displacement values may be considerably higher (please contact for further consultation). - axial displacement: usually without problems (expansion due to temperature) - angular displacement: usually without problems - allowed max. value: 1 to 2 degrees - lateral or parallel displacement: If the admissible values are considerably exceeded, permanent distortion at the bellows resp. higher wear of the elastomer spider can occur. Special care during fitting must be taken! Spring rigidity - axial / lateral: [ N / mm ] Restoring forces of the metal bellow resp. of the elastomer spider, resulting of the misalignments. Dimensioning of the coupling a) according to torque: Usually the size of the coupling is chosen according to the torque. For exact determination of the necessary driving torque, difficult calculations are neccessary (see formularies). If the size of the motor is fixed, the necessary nominal torque of the coupling can be calculated as follows: TKN > _ 1,25 x TA max x i TAmax = peak torque of the motor i = transmission resp. reduction of the toothed belt drive resp. the spur- toothed wheel b) according to the torsional rigidity: For applications with very precise requirements (position control, transmitter), transfer errors due to high elastic deformation can be an importand criteria of selection of the coupling. The torsional angle αt is calculated as follows: TA αt = CTK [arc minutes] with TA= driving torque [Nm] / CTK= torsional rigidity of the coupling [Nm/arcmin] In very few cases, metal bellow can have resonance sounds (e.g. a whistling or a humming). Then coupling types with a higher torsional rigidity or vibration reducing elastomer are recommended. 3

5 Dimensioning c) according to the shaft diameter: After selecting the coupling type, it must be checked whether the requested shaft diameter corresponds with the allowed diameter (Dmin / Dmax) of the hub bores. Another coupling type or size must be chosen, if the shaft diameter is overdimensioned in relation to the torque, which means it is larger than Dmax of the hub. Note: Hub bores which are smaller than Dmin. are possible; but an optimal transfer of the nominal torque can not be guaranteed in this case, so a reduction of TKM is necessary. d) Useful life of the coupling - durability: The durability of JAKOB compensating is basically determined by the peak torque and the existing shaft displacement or misalignment. If the admissible maximum values for the axial, lateral and angular displacement are not exceeded, and if the operating torque at the same time is below the coupling nominal torque TKN, then the coupling is within the range of prolonged alternating-stress strength limit. An infinite number of start - stop - cycles or acceleration and deceleration can be carried out without having to expect a break - down of the coupling during operation. e) Max. load: In special cases, the (metal bellow, membrane, elastomer spider) can be overloaded for a short time with twice the nominal torque (2 x TKN). The hub-bore-connection, however, must be calculated seperately then. f) Bearing loads: Due to the flexibility of the compensating in all directions, considerable bearing loads are prevented, in spite of possible axial, lateral or angular displacement from the drive shaft to the output shaft. Therefore, an early breakdown or higher wear of the rolling bearing can be prevented. This means less difficult and expensive repairing. g) Operating temperatures: Metal bellow and membrane are, as whole metal, extremely insensitive to temperature and can be used at temperatures up to 300 C without limitation. The temperature limit of the elastomer spider is at 90 C (98 Sh-A) resp. 120 C (72 Sh-D). At high operating temperatures, an appropriate correction factor needs to be applied. h) Speeds: Due to precision machining and the rotation symmetrical design resp. the additional balance pin, the compensating are generally suitable for high speeds up to 20,000 min -1 even without additional balancing. The standard balancing quality are approx. Q 6.3 to Q 16. Couplings with conical hubs or hubs with tapered ring can be operated with speeds over 25,000 min -1 (please contact us for further consultation). The low moment of inertia also has a positive effect. i) Maintenance and wear: Compensation are maintenance and wear free under normal conditions. The polyurethan spiders of the elastomer should be changed in suitable periods, if critical operation parameters are given. 4

6 Formulas - drive technology typical construction -feed drivemachine tool Note: If the driving axis is constructed without gear resp. toothed beltdrive > ig = 1 1 Rate of feed V: V = PSP nsp [ m / min ] PSP = spindle pitch - BS [ m ] nsp = spindle speed - BS [ min -1 ] 2 Neccesarry max. motor speed n M nec. : n M nec. = Vrap ig [ min -1 ] PSP Vrap = rapid feed - slide [ m / min ] ig = transmission gear / toothed beltdrive 3 Basic figure - ball screw: DSP nsp < _ control figure DSP = spindle diameter - BS The dimensioning of the spindle is made seperately according to the specifications resp. nomograms of the manufacturer. 4 Necesarry engine torque - stationary T M nec. : TMnec. = Fx PSP 2 π η SP η G ig < _ TMo [Nm] FX = axial force slide (see 5) [ N ] ηsp = efficiency - spindle 0,9 ηg = efficiency - Gear 0,90-0,95 TMo = moment - motor for continous operation 5 Axial force - slide (stationary) FX: FX = FC + FF [N] F C = cutting force resp. feed [ N ] FF = friction force - saddle slideway (see 6) [ N ] 6 Friction force - saddle slideway FF: FF = μ S g (ms + mw) [ N ] μ S = friction of saddle slideway / g = 9,81m/s² ms = mass of slide [kg] mw = load mass - workpiece [kg] 7 Acceleration torque - motor T Ma: TMa = Jsub α M ± TF < T Mmax [ Nm ] Jsub = substitute moment of inertia [ kgm² ] = total moment of inertia, reduced to motor shaft ( see 9 ) αm = angular acceleration - motor (see 8) [s -2 ] T F = friction moment slide [Nm] (see 10) T Mmax = max. engine torque [Nm] 8 Angular acceleration motor α M : α M = 2 π n M t H α M = 2 π a S P SP [ s -2 ] th = max. tzul [ s -2 ] th = run-up time - motor (see 11) [m/s] as = axial acceleration - slide [m/s] nm = speed regulation n2 -n1 if n1 = 0 > nm = max. nmnec. 9 Total moment of inertia J sub : Jsub=JM +JG+ JC + JSP + ms + m W ( PSP ) ² ig² ig² ig² 2 π JM = moment of inertia - motor (according to manufacturer) [kgm²] JG = moment of inertia - gear [kgm²] (acc. to manufacturer, resp. with toothed beltdrive the pulley at spindle-side must be reduced to the motor shaft) JC = moment of inertia - coupling (acc. to the manufacturer)[kgm²] JSP = moment of inertia - spindle (acc. to the manufacturer) [kgm²] 10 Friction moment - slide (reduced to motor shaft)t F : TF = FF PSP 2π ηsp ηg ig 11 Run- up time - drive (motor): [Nm] ( F R from 6.) th = Jsub. n M < _ tmax [s] 9,56 TMa tmax - acc to manufacturer - motor (~300ms) ~ - for exact determination of th, a motion diagram might be necessary. 12 Estiminated calculation - coupling torque T M: TM = 9550 P M nm [Nm] PM = motor power [ kw ] nm = motor speed [ min -1 ] [kgm²] 5

7 Alignment of shafts: Axial and angle displacement are usually without problems and also simple to measure. To obtain the lateral displacement it is recommended to proceed as follows: Fit a dial gauge with an appropriate holding device on one shaft end or on one hub of the coupling and bring it with the stylus onto the second shaft end or onto the second coupling half (sketch). Now the shafts are turned with the dial gauge and the deflection is read. One half of the total deflection is the lateral misalignment. The admissible value for the shaft displacements must be taken from the technical data sheets of the appropriate series. Installation instructions Shaft - hub connection The are supplied with finished bores as a rule, andin exceptional cases they are also supplied prebored. The seat shaft/hub is to be selected as a transitional seat (example: hub bore diameter 28 G6 - shaft diameter 28 k6). a) Radial clamping hub Admissible seat clearance shaft hub: min. 0,01 mm max. 0,04 mm Very simple fitting by tightening only one radially arranged clamping screw (DIN 912). Prior to mounting the finished bore shaft end conical sleeve should be lightly oiled to prevent fretting corrosion. The coupling is then ready for assembly between the two shafts. An existing keyway in the shaft will not affect the frictional connection. (see EASY-clamp-sytem page 8) The value for the relevant tightening torques can be found in the data sheets. One hole in the housing is sufficient, as a rule, to tightening the clamping screw. (see EASY-clamp-sytem page 8) b) Splithub Admissible seat clearance shaft - hub: min. 0,01mm max. 0,04mm Two radial clamping screws (DIN 912) are arranged mirrored. The hubs or are split and consist of 2 loose halves. One of the splitting hubs can be put onto the aligned shaft. Tighten clamping screws evenly, alternating between both sides (note specified tightening torques). A larger opening must be provided in the housing for easy installations. c) Conical hub / conical ring hub Admissible seat clearance shaft - hub: max. 0,02mm Assembly of the conical bush or of the conical clamping ring with several, concentrically arranged mounting screws (as a rule 6x DIN 933). One side of the coupling is fitted onto the shaft end by evenly tightening the screws, crosswise (to prevent uneven draw-on). The drive or output is now turned by a few revolutions, so that the shaft pinion turns in the second hub and the hub can move on the shaft for axial release. Now the 6 screws of the second hub are also evenly tightened. Disassembly After releasing the 12 (6) retaining screws, the hubs are released with 3 push-off threads each.with axially tight space conditions, it is advisable to screw in and Special notes Metal bellows coupling: As the metal bellows consist of thin stainless steel sheeting, special care during fitting and disassembly is neccesarry. Damages to the bellows can render the coupling useless. secure the push-off-screws before fitting. For disassembly an opening in the housing should be provided. Elastomer : Due to the plugability a blind fitting is also possible. Oil the elastomer spiders lightly before fitting. You will find further type specific technical details and characteristics in the data sheets. 6

8 Metal bellows - Aluminium Clamping hubs 4 Technical 1 Stainless Steel Bellows 2 Patented Connection 5 New Patent EASY-CLAMP System 3 Balancing Insert 1 The Stainless Steel Bellow Advantages: Thin-Walled Multi-Layered Stainless Steel Bellow 2 The Patented Connection Method Brass Wire Press-Fit Connection - The metal bellow guarantees a zero backlash torque transmission with extremely high torsional stiffness while maintaining flexibility (compensation for misalignment) - Low mass moment of inertia - Maintenance and wear-free up to 300 C - High quality precision manufactured bellow with 100% inspection - Modular designs allow flexibility for different style hub / bellow combinations - We have the experience and knowledge for special application solutions Advantages: - Strong zero backlash connection between the aluminium hubs and multi-layered bellows, alternative steel or stainless steel hubs will be connected with bellows by plasma welding process - Can withstand harsh environments where glued surfaces cannot - (for example, -50 C to 300 C temperature range and where chemicals are present) - With a nickel wire press-fit and stainless steel hubs, the can be used in a vacuum or food-grade envirnment 3 Balancing of the Hub Advantages: - Balanced for high speeds ( up to rpm depending on the size of the coupling ) - Smooth running to prevent oscillations Balancing Insert - Can be specially balanced for higher speeds (with additional cost) 7

9 Metal bellows - Technical 4 The Radial Clamping Hub Nickel Plated Socket Head Cap Screw Q10.9 Advantages: - Easy single bolt mounting for shaft-hub connection - Zero backlash torque transmission is guaranteed - Low moment of inertia and light weight - Quick Delivery - Keyways available upon request ( for an addittional cost ) 5 The EASY - Clamp System Advantages: - The newestand best engineered technology for mounting - Eliminates possibility of damaging coupling during installation or deinstallation - Quicker installation Patented EASY - Clamp - System - Tolerance differences between shaft and coup ling will be compensated - No additional tools needed for installation - Easier to uninstall The zero backlash clamping hub is connected to the shaft while providing a high clamping force. By loosening the socket head cap screw against the pin, the clamping hub is easily expandet for assembly or dis-assembly. 6 The conical connection Advantages: - Through force amplifying (wedge principal) a safe transmission of the torque although for smaller bore sizes (hub additionally sliced) is guaranteed. - Backlash- and maintenance- free, actuated by adherence without keyway - Rotary symetric, good balancing conical clamping hub conical ring hub expanding cone hub - Expanding cone hub for axial mountening in a hollow shaft 8

10 Metal bellows coupling Series KM 6-corrugation bellows - simple installation, with EASY- clamping hub cost- effective standard series Technical data: moment torsional max.shaft axial lateral mass tightening torque KM TN of inertia stiffness displacement (mm) spring rate spring rate approx. of screws Size [Nm] [10-3 kgm 2 ] [Nm/arcmin] axial± lateral [N/mm] [N/mm] [kg] [Nm] smaller from 0,4-12 Nm see Series MKM ,14 5,2 0,8 0, , ,14 5,8 0,8 0, , ,29 8,7 0,9 0, , , , , , , , , , , , , , , , , , , , , , ,5 290 Material: - bellows: stainless steel - hubs: high tensile strength aluminium - screws: DIN nickel plated Dimensions: (mm) length dimensions according to DIN ISO 2768 ch KM Ø a c f g h l ØD1/2min ØD1/2max M , M , M , ,5 M , ,5 M , M M ,5 M , M , M M Ordering example: KM D1 = 30 G7 D2 = 35 G7 9

11 Metal bellows coupling Series KP 4 -corrugation bellows high torsional stiffness - short design simple installation, with radial EASY - clamping hub Technical Data: moment torsional max. shaft axial lateral mass tightening torque KP TN of inertia stiffness displacement (mm) spring rate spring rate approx. of screws Size [Nm] [10-3 kgm 2 ] [Nm/arcmin] axial ± lateral [N/mm] [N/mm] [kg] [Nm] smaller from 2-12 Nm see Series MKP (page 28) ,13 9 0,5 0, , ,13 9 0,5 0, , , ,6 0, , , ,6 0, , , ,8 0, , ,8 0, , , ,7 0, , , ,7 0, ,0 115 Material: - bellows: stainless steel - hubs: high tensile strength aluminium - screws: DIN nickel plated Dimensions: (mm) length dimensions according to DIN ISO 2768 ch KP Ø a c f g h l ØD1/2min ØD1/2max M , M , M , M , ,5 M , M M ,5 M , Ordering example: KP D1 = 43 G7 D2 = 40 G7 10

12 Metal bellows coupling 4 -corrogation bellows simple installation, with radial EASY - clamping hub for direct mounting in a hollow shaft internal axial buffer Technical data: Series KPS moment torsional max. shaft axial lateral mass tightening torque KPS TN of inertia stiffness displacement (mm) spring rate spring rate approx. of screws f / i Size [Nm] [10-3 kgm 2 ] [Nm/arcmin] axial ± lateral [N/mm] [N/mm] [kg] [Nm] 2 2 0,01 0,4 0,25 0, , ,02 1,9 0,5 0, , ,13 7 0,5 0, , , ,6 0, , , ,8 0, , , ,7 0, , , ,7 0, ,6 185/115 Material: - bellows: stainless steel - hubs: high tensile strength aluminium - expanding cone: heat trated steel - screws: DIN 912 nickel plated Dimensions: (mm) length dimensions according to DIN ISO 2768 ch Ø D1 Ø D2 g6 KPS Ø a Ø b c e f / i h l tmin tmax min max min max 2 24,5 (27,5) 22 7,5 10 M 3 4, (14) ,5 (44,5) M , (21) M 6 7, M 8 8, ,5 30 M 10 10, M ,5 42 M 14/12 13, Notice: The associated bore size for the expanding cone >>ØD2<< with tolerance H7. Sizes KPS 2 and KPS 8 without EASY-Clamp. Ordering example: KPS 20 - D1 = 15 G7 - D2 = 20 g6 Application example: Integrated design of a KPS coupling 11

13 Metal bellows coupling Series KR straight bellows - long design simple installation, with radial EASY - clamping hub low restoring forces - high torsional rigdity Technical data: moment torsional max. shaft axial lateral mass tightening torque KR TN of inertia stiffness displacement (mm) spring rate spring rate approx. of screws Size [Nm] [10-3 kgm 2 ] [Nm/arcmin] axial ± lateral [N/mm] [N/mm] [kg] [Nm] ,12 9 0,3 0, , , ,3 0, , , ,3 0, , ,7 23 0,45 0, , , ,3 0, , ,4 0, , , ,3 0, , ,2 98 0,5 0, ,68 0, ,4 290 l g h f-din 912 Ø a Ø D1 Ø D2 c Material: - bellows: stainless steel - hubs: high tensile strength aluminium - screws: DIN nickel plated Dimensions: (mm) length dimensions according to DIN ISO 2768 ch KR Øa c f g h l ØD1/2min ØD1/2max M , M , M , ,5 M , ,5 M , M M ,5 M , M Ordering example: KR D1 = 35 G7 D2 = 35 G7 12

14 Metal bellows coupling 6 - corrugation bellows - short design - conical hub on both sides cost - effective standard series Technical data: Series KSD KSD TN moment torsional max.shaft axiale lateral mass tightening torque of inertia stiffness displacement (mm) spring rate spring rate approx. of screws Size [Nm] [10-3kgm2] [Nm/arcmin] axial ± lateral [N/mm] [N/mm] [kg] [Nm] ,03 2 0,6 0, , ,1 5,5 0,8 0, , ,1 6,0 0,8 0, , ,3 9,0 0,9 0, , , , , , , , , , , , , , , , , , , , , , Material: - bellows: stainless steel - hubs: heat - treated steel - screws: DIN nickel plated Dimensions: (mm) length dimensions according to DIN ISO 2768 ch Ø D 1/2 pre- KSD Ø a Ø b Ø c e 6 x f g h l min. max. bored 10 39, M4- DIN M M M M M M M M M M M Ordering example: KSD D1 = 42 G7 D2 = 30 G7 13

15 Metal bellows coupling straight bellows - long design conical bush on both sides low restoring forces - high torsional rigidity Technical data: Series KSS moment torsional max.shaft axial lateral mass tightening torque KSS TN of inertia stiffness displacement (mm) spring rate spring rate approx. of screws Size [Nm] [10-3 kgm 2 ] [Nm/arcmin] axial ± lateral [N/mm] [N/mm] [kg] [Nm] ,1 9 0,3 0, , ,1 10 0,3 0, , ,3 13 0,3 0, , , ,45 0, , , ,3 0, , ,3 50 0,4 0, , ,4 70 0,3 0, , ,8 98 0,5 0, , ,7 0, , ,6 0, , ,0 0, Material: - bellows: stainless steel - hub: stainless steel - screws: DIN nickel plated Dimensions: (mm) length dimensions according to DIN ISO 2768 ch Ø D 1/2 pre- KSS Ø a Ø b Ø c e 6 x f g h l min. max. bored M M M M M M M M M M M 10* Notice: 8x M10 / DIN with conical ring hub Ordering example: KSS D1 = 28 G7 D2 = 35 G7 14

16 Metal bellows coupling plug-in design simple installation, EASY- clamping hub high torsional stiffness, backlash free, exact torque transmission sturdy whole metal version for temperatures up to 300 C Series KPP Technical data: moment torsional max.shaft displace- axial laterale mass tightening torque axial KPP TN of inertia stiffness ment (mm) spring rate spring rate approx. of screws preload force Size [Nm] [10-3 kgm 2 ] [Nm/arcmin] axial ± lateral [N/mm] [N/mm] [kg] [Nm] approx. [N] , ,6 0, , ,17 4,6 0,5 0, , ,17 5 0,5 0, , ,34 8 0,6 0, , , ,6 0, , , ,8 0, , ,2 31 0,8 0, , ,4 45 0,7 0, , ,5 67 0,7 0, , Size KPP 1300 with conical clamping bush on request Material: - bellows: stainless steel - hub: high tensile aluminium - screws: DIN nickeled Dimensions: (mm) length dimensions according to DIN ISO 2768 ch KPP Ø a Ø b c f g h V l ØD1/2min ØD1/2max 10 39, M , / M ,5 1-1,5 77, M ,5 1-1,5 77, M ,5 1-1,5 85, M 8 23,5 8,5 1-1, ,5 M ,5 1-1,5 99, M ,5 106, M ,5 110, ,5 M ,5 1-1,5 120, Ordering example: KPP D1 = 28 G7 D2 = 35 G7 15

17 Metal bellow coupling Series KPP General: The pluggable, two-parted metal bellow are constructed for applications which are difficult to reach, applications without assembly boring for the clamping screws of the coupling hubs or where generally only blind fitting is possible. For such applications, the assembly is faciliated by the axial pluggability. Also, in case of service, the disassembly is much easier, because the drive unit can be torn off "backwards" without the difficult loosening of the hubs. Product specific characteristics, which define the metal bellow, nevertheless apply for the KPP, too. These are the absolute zero backlash, high torsional stiffness, low mass moment of inertia, compensation of misalignments as well as high operating speed and high operating temperatures. Depending on the special operation parameters, plug-in elastomer of series EKM & ESM provide a very good alternative. Function: The axial pluggability is achieved by a backlash-free carrierkeyway-connection in whole metal version (aluminium anodized). For this, one hub part is delivered as a conical carrier, the counterpart with a congruent conical keyway. An additional centering element guarantees an exact alignment of both hub halves. To achieve the necessary axial prestress of the plug-in-connection, the spring tension of the metal bellow is used. For this, the bellow is pressed during assembly by 1-1,5 mm. This means, that the unstressed coupling length "l" (see measuring table) is reduced by the prestress value "V" after assembly. Because of the low prestress, the operativeness of the metal bellow is not reduced. The resulting residual forces usually have no negative influence on the shaft bearing. Assembly notes: To guarantee optimum performance of the plug-in-connection, the prestress value of 1-1,5 mm at the metal bellow must definitely be given special care. In most cases, it is sufficient, if the designer considers this. Another possibility for the mechanic is, to mount the whole coupling onto the drive shaft before fitting it to the motor (see drawing). With a depth gage the distance value "T" from the bearing surface of the bell to the front-part of the plug-in hub can be defined. The mounting value "M" on the motor wave is given by M=T+V adding the distance value "T" to the prestress value "V". In serial use the mounting can be facilitated to a great extent by using a corresponding adjusting ring. If the angular position of the carrier to the keyway does not fit during the plug-in, the metal bellow may be pressed for some more millimeters (this bellow deformation is allowed in exceptional cases). By slow turning of the drive shaft, the carrier fits the keyway in synchronous position and the coupling is ready for use. Note: Special versions: Generally, the standard series KPP with a radial clamping hub on both sides is only one version. Special versions regarding the hubs or the metal bellow as well as alternative materials according to the customer's requirements are possible upon request. The picture shows an application example of a plug-in element in flange version for direct gear attachment. 16

18 Metal bellows coupling Series KG / [KG-VA] short design - backlash free - torsional stiff - up to 1300 Nm all- steel- version - up to 350 C - wear and maintenance free simple installation - with easy- clamping hub (size 5/10/20 - optional) Technical data: alternative: KG moment torsional max.shaft axial lateral mass tightening tourque [KG-VA] TN of inertia stiffness displacement(mm) spring rate spring rate approx. of screws Size [Nm] [10-3 kgm 2 ] [Nm/arcmin] axial ± lateral [N/mm] [N/mm] [kg] [Nm] 5 5 0,004 0,9 0,3 0, , ,019 2,1 0,4 0, , ,044 3,4 0,4 0, , ,18 9 0,6 0, , , ,6 0, , , ,6 0, , , ,7 0, , ,6 52 0,8 0, , , ,8 0, , ,7 0, ,5 300 Material: - bellows: stainless steel hubs: steel St 52 - [KG-VA: / V2A] - screws: DIN nickel plated Notice: Connection between bellows and hub: with plasma welding-process Dimensions: (mm) length dimensions according to DIN ISO 2768 ch KG [KG-VA] Ø a c f g ±1 h l ±1 ØD1/2min ØD1/2max ,3 M , ,5 M ,5 13 M M , ,5 M M [40] ,5 M , M , [52] M ,5 [13] 85 [89] [68] M , Ordering example: KG 40 - D1 = 16 G7 D2 = 24 G7 KG - VA D1 = 32 G7 D2 = 35 G7 [stainless steel version] Versions with longer metal bellows or special hubs are possible if specially required by customer. 17

19 Metal bellows coupling for high torques up to Nm backlash free, exact torque transfer, high torsional stiffness low moments of inertia, high tolerance of shaft displacements three- parted construction, easy to fit, variable in use Series KXL The metal bellows of the series KXL are constructed for medium- size to big drives of up to max Nm. Although this type of coupling has proven itself reliable for years, the series was completely reworked in order to make it even more attractive regarding technical parameters as well as the aspect of costs. It is very special because of the three- parted construction with a flexible intermediate piece (bellow). This intermediate piece can be disassembled. It consists of an optimal torsionally stiff stainless steel bellow with 2 bellow shafts on each side and an intermediate pipe which is variable in length. The connection with the two hubs is frictionally engaged (screws acc. to DIN 933). Therefore, assembly is much easier as, e.g. in case of inspection or service, the heavy drive unit or the output unit need not be disassembled. The designer can chose between several hub variations (see selection table).the very good moment of inertia and the rotation symmetrical design ensure good dynamic operation characteristics. KXL- are most suitable for precise drives, such as for printing machines, cross cutters, main spindle drives, transfer axis or gearbox attachement. Material: Bellow: stainless steel Flange: heat-treated steel - black finish Hubs: heat-treated steel - black finish, resp. GGG 60 Hub type A Hub type B Hub type C Hub type E Hub type F Hub type G - frictional, backlash free conical clamping ring connection, external - free radial disassembly of the bellow part (see drawing on page 17) - frictional, backlash free conical clamping ring connection, internal - short, free radial disassembly of the bellow part is not possible - with feather keyway DIN Page 1 resp. DIN 6886, external - free radial disassembly of the bellow part - with feather keyway DIN Page 1 resp. DIN 6886, internal - free radial disassembly of the bellow part is not possible - attached flange, center outside, acc. to ISO 9409, resp. customer's requirements - radial disassembly possible (please further consultation), backlash free - attached flange, center inside, acc. to ISO 9409, resp. customer's requirements - radial disassembly possible (please further consultation), backlash free Selection table Characteristics A B C E F G torsionally stiff backlash free /- +/ moment of inertia changing of torque reversing operation /- +/ free radial disassembly /- +/- easy to fit cost-effective Ordering example: (see example on page 17) KXL 6; L 16 = 72 mm (A = 200 mm) D1 = hub A for shaft-ø 80 h6 D2 = hub A for shaft-ø 90 h6 18

20 Metal bellows coupling Technical data: Series KXL KXL torque torsional stiffness spring rate moment of inertia nominal max. total 1) bellow pipe per hub per hub per hub axial angular bellow 1) torque torque (2x2) (per mm) A / B C / E F / G Size TN Tmax C T L16 C T B C T ZR 10³ Ca Cw JA/JB JC / JE JF / JG JB L16 [Nm] [Nm] [Nm / arcmin] [N / mm] [Nm / ] [kgm²] [kgm²] [kgm²] [kgm²] 2, ,02 0,02 0,01 0,01 3, ,06 0,05 0,02 0, ,11 0,10 0,04 0,03 8, ,16 0,13 0,06 0,05 13, ,22 0,23 0,08 0, ,47 0,51 0,18 0, ,27 1,26 0,53 0,41 KXL max. shaft displacement mass per hub per hub per hub axial ± angular radial 1) bellow A / B C / E F / G 1) Size δa δw δr L16 m A /m B m C / m E m F /m G m BL16 [mm] [ ] [mm] [kg] [kg] [kg] [kg] 2,5 3 1,4 0,8 5,8 5,5 2,5 1,3 3,5 3,2 1,3 0,8 9,7 9,7 3,3 1,7 6 3,5 1,3 0,9 13,1 13,5 5,7 2,6 8,5 3,8 1,3 1,2 17,9 16,5 7,1 3,5 13,5 4,4 1,3 1,3 20,3 22,7 7,9 5,1 19 4,6 1,2 1,5 32,1 37,4 11,6 6,6 30 4,8 1,2 1,6 58,2 61,3 20,6 9,3 1) Parameters for standard length L 16 Data depending on length: Total torsional stiffness: 1 CTges = 1/CTB + L16/CTZR Max. allowed radial displacement: Rmax = (L16+L15) tan δw 2 Note: The specific parameters for the total weight resp. the total moment of inertia must be rounded off in dependence of length "L 16". Note: In case of shift frequencies of up to 5x per hour, a momentary start push of 1.2 x Tmax is possible. In cases of reduced torques or lower endurance, larger shaft misalignments are possible (please further consultation). If axial, angular and radial displacements occur at the same time, the total must not exceed 100% (see formula). δ a existing δ w existing δ r existing + + δ < a allowed δ w allowed δ r allowed 1 Example - technical application: Technical parameters: - Tmax = 7000 Nm - changing torque - shaft distance: 200mm... Further requirements: - free radial disassembly, backlash free Selection: Size KXL 6 - double-sided hub type A Calculation of the technical parameters: Total length: L4 = shaft distance 200 mm +2 L2 = 320 mm Length of intermediate pipe:l16 =(L4+4mm)-2 (L1 + L14 + L15)= 69mm Total weight approx.: mtot = 2 ma + mbl16 = 29 kg Moment of inertia approx.: Jtot =2 JA + JBL16 = 0,22 kgm² 1 Torsional stiffness: CTtot = = 893 Nm/arcmin 1/CT B + L16 /CTZR Max. radial displacement: Rmax =(L16+L15) tan δw = 1,2 mm 2 19

21 Metal bellows coupling Dimensions (mm) according to DIN ISO 2768 ch Size 2,5 3,5 6 8,5 13, D1 min D2 max Series KXL D D D D D D L L2 48,5 53,5 60, L L4** L L ,5 8, ,5 12,5 L , L L L10** L L12** L L ,5 28 L ,5 34, L16* L17** L L L20** L f i TA-f [Nm] TA-f [Nm] 12 x 12 x 12 x 12 x 14 x 12 x 12 x M10 M10 M12 M14 M16 M18 M20 8x 10x 9x 8x 9x 8x 10x M10 M10 M12 M14 M14 M16 M * sstandard length - intermediate part: Different dimensions for L 16 possible, please advice along with the order. ** Overall length for standard length L16 Note: Dimensions of flange hub types F and G of ØD9, ØD10, ØD11, ØD12 customized. 20

22 Metal bellows further types Series KE - flange design costeffective, torsional stiff metal bellows coupling attachement for flanges, special hubs, locking assemblies, gearboxes... hub dimensions and bellows size customized up to Nm Series KHS - High Speed - design speed upto rpm Aluminium design - low inertia special conical clamping ring connection rotary symetric design - high balance quality 6 different size from 15 upto 600 Nm Series KGH - splitted hub design simple installation customized length all- steel- version, up to 350 C backlash free - toesionsl stiff 5 different sizes from 40 upto 700 Nm Special variations special hub and bellow design according to customer request stainless steel, for vacuum-, or satelite technic applications optimized solutions for motor-, gearboxconnection with extremely short design, only 2 corrugations 21

23 Elastomer General Elastomer of series E can be plugged in, are backlash free, flexible shaft- for small to medium torques. A elastomer spider serves as connection and compensation element with involute-shaped teeth and high Shore hardness. This is inserted form fitting, with slight preload between two high precision machined hubs with involute shaped jaws. The elastomer spider can compensate slight shaft misalignments, is electrically insulating and demonstrates a good oscillation dampening characteristic. Two variations with backlash free, frictional shaft-hub connection are available as standard which ensure a safe torque transfer, even without keyways. Characteristics: plug-in, backlash free, flexible elastomer spider with different shore hardness low moment of inertia, high speed oscillation dampening series ESM according to DIN (proposed) Standardseries: Series EKM with easy to fit radial clamping hub Series ESM with conical hub and clamping ring for high speeds Series ESM-A with aluminium conical hub, reduced mass moment of inertia Series EKS with expanding cone and radial clamping hub, short design (other combinations available on request) Material: Elastomer spider:... polyurethane 98 Shore-A (red) or polyurethane 72 Shore-D (white) alternative elastomer- hardness on request radial clamping hub EKM:. high tensile aluminium hub ESM:...heat-treated steel - black finish coniacal hub ESM-A:...high tensile aluminium clamping ring ESM:...heat treated steel-black finisch Application examples The possible areas of applications for the elastomer range from demanding drive systems in the general machine design, to applications in the instrumentation and control technology, to the spindle and axis drives of machine tools. Series EKZ with radial clamping hub on both sides and intermediate pipe (more details under with intermediate shaft) Series ESM with special flange for brake attachement 22

24 Elastomer Coupling layout: Rough calculation formula: Roughly, the required coupling torque T K can be calculated as for the following formula: T A = drive torque [Nm] f T K = T A f D f T f B < _ T D = torsional stiffness factor KN f T = temperature factor f B = operating factor Dimensioning The important layout criteria are the required drive torque, the necessary torsional stiffness and the dampening characteristic of the coupling. Additionally, the minimum or maximum possible shaft diameter, the admissible temperature range, operating factors and the existing shaft misalignment, particularly the radial displacement, must be taken into consideration. Basically, the selection can be influenced by the coupling size and the hardness of the elastomer spider. The calculated coupling torque T K should not exceed the nominal torque of the selected coupling size. Short term overload up to twice the value of the nominal torque is admissible. TA = 9550 x P A n B T A = drive torque [Nm] P A = motor output [KW] n B = motor speed [min -1 ] Temperature factor f T: Admissible temperature range for continuous operation PUR 98 Sh - A : -30 C bis + 90 C PUR 72 Sh - D : -20 C bis C Torsional stiffness factor f D: If an exact, accurate transfer of the torque is required, as for instance with servo drives or measuring systems, a high torsional stiffness is absolutely necessary. Here the required drive torque should be multiplied with a operating factor of at least 3 to 10 when selecting the size, or a torsionally stiff metal bellows coupling Operating temperature Factor f T +30 C - 30 C +50 C +70 C +90 C ,3 1,6 1,8 2 selected from the extensive coupling range in this catalogue. Operating factor f B : Due to operating factor fb application specific peculiarities, such as shock loading, are taken into consideration. Application example: ESM-coupling: drive of a short bore spindle according to DIN (design) Note on DIN (design): Technical data and dimensions of several sizes in the series ESM are according to the specifications of DIN Therefore, the ESM are particularly suitable for use in spindle drives (i.e. short bore spindles) for high speeds. Low mass moments of inertia and high degree of balance ensure excellent dynamic characteristics. The coupling is prepared for an axial clamping of the spindle bearing, as well as for a central coolant feed through. 23

25 Elastomer Assembly The design of the ESM coupling requires mounting of the two hub halves on the shaft ends before the actual plug- in assembly. Here it must be noted, that the mounting screws are tightened evenly crosswise, to prevent surface distortion of the conical clamping ring. Couplings of the EKM series, on the other hand, can be completely assembled before the hub mounting. For mounting the EKM hub only a radially arranged clamping screw must be tightened. Chamfered edges at the face basically also enable a blind assembly with both versions. Due to the obliga- Installation instructions tory preclamping of the elastomer, an axial assembly force must be applied during the sliding together of the coupling spider and the jaws. This assembly force can be minimised by slight oiling of the spider. For disassembly of the ESM conical hub, pushoff threads are provided for releasing the clamping ring. The relevant tightening torques of the retaining screws can be found in the technical data sheets. The seat saft / hub is to be selected as transitional seat (e.g. bore *28G6 / shaft *28k6). Admissible seat clearance shaft / hub: Series ESM: max. 0,02 mm Series EKM: min. 0,01mm / max. 0,04mm To ensure satisfactory function, the dimension g should be complied with as exactly as possible. The distance of the two shaft ends can certainly be smaller than g under consideration of the measurements m and n. Notes: The dampening capability of the elastomer spider protects the drive to a high extent from dynamic overload. Both coupling halves are always forced to move (min. 3xTN) because of the jaw construction, even if the spider should break down totally (e.g. safety instructions - vertical axis).) Because of the deformation of the elastomer spider under operation conditions, the housing (bell) should be approximately 5 % bigger than the outer diameter of the coupling itself. To ensure satisfactory function, the dimension "g" should be complied with as exactly as possible. The distance of the two shaft ends can certainly be smaller than "g" under consideration of the measurements "m" and "n" of the spider. For additional price, the radial clamping hubs can also be equipped with the easy-to-fit "Easy-Clamp-System" upon request (see also page 8). For smaller shaft diameters, the conical hub of ESM- is additionally slitted. Dimensions - Elastomerspider Sizes Ø s Ø m n o Øp +0,5 8 / , ,5 15/17/20/ ,5 30/43/45/ ,5 60/ ,5 150 / ,5 300/320/ , ,5 700 / ,5 Material: Polyurethan 98 Shore - A / red 72 Shore - D / white different shore hardness available on request Note: If required by the customer for special application (e.g. longer shaft plug in depth), diameter "p" of the inner bore of the spider can be extended up to max. øm -2mm (upon request ). 24

26 Elastomer coupling radial clamping hub on both sides, plug in, backlash free cost - effective standard series Technical data: Series EKM moment torsional stiffness max. shaft radial mass tightening torque EKM TN hardness of inertia (stat. at 0,5 x T N ) displacement [mm] spring rate approx. of screws Size [Nm] [Shore] [10-3 kgm 2 ] [Nm/arcmin] axial ± lateral [N/mm] [kg] [Nm] Sh-A 0,01 0,04 0,5 0, , Sh-A 0,03 0,24 0,5 0, , Sh-D 0,03 0,34 0,5 0, , Sh-A 0,09 0,41 0,5 0, ,21 14 (8)* Sh-D 0,09 0,58 0,5 0, , Sh-A 0,18 0,61 0,5 0, , Sh-D 0,18 0,90 0,5 0, ,32 35 (14)* Sh-A 0,38 1,05 1 0, ,52 67 (35)* Sh-D 0,38 1,50 1 0, ,52 67 (35)* Sh-A 1,0 2,00 1 0, ,9 115 (67)* Sh-D 1,0 2,85 1 0, ,9 115 (67)* Sh-A 2,2 5,80 1 0, , Sh-A 5,2 8,00 1 0, , Sh-D 5,2 12,0 1 0, ,5 185 Material: - elastomer spider: polyurethane - hubs: high tensile strength aluminium - screws: DIN nickel plated Dimensions: (mm) length dimensions according to DIN ISO 2768 mh EKM Ø a c e f g h l Ø D1/2 ØD1/2 ØD1/2 min max prebored ,5 13,5 M M M ,5 (18)* 20 M 6 (M 5)* (30)* ,5 20 M ,5 22 M ,5 (20)* 22 M 8 (M 6)* (32)* (25)* 26,5 M10 (M 8)* (38)* (25)* 26,5 M 10 (M 8)* (38)* (30)* 31 M 12 (M 10)* (48)* (30)* 31 M 12 (M 10)* (48)* M M M *CAUTION: state alternative separately while ordering (for larger shaft diameters) Ordering example: EKM 90 - D1 = 24 G7 D2 = 27 G7

27 Elastomer coupling Series ESM / ESM-A with conical hub and clamping ring, plug in, backlash free rotary symetric design, high speed Technical data: ESM momentof inertia torsionalstiffness max. shaft radial mass tightening torque max. size ESM-A TN hardness (10-3 kgm 2 ) (stat.at0,5xt N ) displacement(mm) spring rate (kg) of screws speed according Size [Nm] [Shore] ESM ESM-A [Nm/arcmin] axial± lateral [N/mm] ESM ESM-A [Nm] [min -1 ] DIN Sh-A 0,02 0,015 0,04 0,5 0, ,15 0,11 1, x Sh-A 0,08 0,05 0,24 0,5 0, ,35 0, x Sh-D 0,10 0,06 0,35 0,5 0, ,35 0, Sh-A 0,29 0,19 0,40 0,5 0, ,65 0, x Sh-D 0,29 0,19 0,58 0,5 0, ,65 0, Sh-A 0,43 0,28 0,60 0,5 0, ,9 0, x Sh-D 0,43 0,28 0,90 0,5 0, ,9 0, Sh-A 0,92 0,65 1,05 1 0, ,2 0, x Sh-D 0,92 0,65 1,52 1 0, ,2 0, Sh-A 2,70 2,0 2,00 1 0, ,6 1, Sh-D 2,70 2,0 2,85 1 0, ,6 1, Sh-A 8,80 5,6 5,80 1 0, ,0 4, Sh-A 20,5 13,0 8,00 1 0, ,5 7, Sh-D 20,5 13,0 12,0 1 0, ,5 7, Material: - Elastomer spider: polyurethane - conical hub: ESM: heat treated steel - black finish - conical hub: ESM-A: high tensile aluminium - clamping ring: heat treated steel - black finish - screws: DIN nickel plated Dimensions: (mm) length dimensions according to DIN ISO 2768 mh ESM Ø a Ø b e f g k l Ø D1/2 Ø D1/2 Ø D1/2 ESM-A min max prebored ,5 4x M , x M x M x M x M x M x M x M x M x M x M X M x M x M Ordering example: ESM-A D1 = 17 G7 D2 = 22 G7 26

28 Elastomer coupling plug in, backlash free, oscillation dampening expanding cone, radial clamping hub short design for hollow - shaft - assembly Technical data: Series EKS with expanding cone moment torsional stiffness max.shaft radial mass tightening torque EKS TN of inertia (stat. at 0,5 x T N ) displacement [mm] spring rate approx. of screws [Nm] Size [Nm] [10-3 kgm 2 ] [Nm/arcmin] axial ± lateral [N/mm] [kg] i f 8 8 0,01 0,04 0,5 0, , ,03 0,23 0,5 0, , ,16 0,60 0,5 0, , ,38 1,00 1 0, , ,94 2,00 1 0, , ,60 5,80 1 0, , ,10 8,00 1 0, , Material: - hub: high tensile strenght aluminium - expanding cone: heat trated steel - screws: DIN nickel plated - elastomer spider: polyurethane 98 Sh-A plug-indepth Dimensions: (mm) length dimensions according to DIN ISO 2768 mh EKS Ø a Ø b c e f h i l t min t max ØD1 ØD2g6 min max min max ,5 12 M 4 6 M 4 44, M 5 8 M ,5 25 M 8 10 M M M 8 81, M M M M M M , Notice: The associated bore size for the expanding cone >>ØD2<< with tolerance H7. Ordering example: EKS 60 - D1 = 18 G7 - D2 = 20 g6 Application example: Integrated design of a EKS coupling. 27

29 Elastomer Special series combination EKM - ESM for connection of shafts with very different diameters to facilitate the assembly of shaft-hub-connections: 1.) ESM - hub from inside 2.) plug-in assembly - elastomer spider 3.) EKM - hub radially from outside to achieve an fitting intermediate length axial stop design by additional snap ring at the periphery for taking up resp. supporting large axial forces nevertheless compensation of parallel and angular misalignment might also be used for easier mounting double-cardan design with double-claws - intermediate piece and two elastomer spiders (variable in length) extremely flexible, so compensation of large misalignments is given (parellel misalignments) very good dampening of oscillation, however, the torsional stiffness is reduced by 50 %. special hub designs for flanging, pressing, etc. to special parts required by the customer with feather keyways or profile bore claw outline can be integrated directly into the element required by the customer (e.g. pinion shaft - gear entrance hubs in half-shell version e.g. for mounting at stationary journal of a shaft 28

30 Miniature - metal bellows coupling Technical data: Series MKM standard series with radial clamping hub temperature range: -100 to +300 C max. moment torsional max. shaft spring rate mass tightening torque MKM TN speed of inertia stiffness displacement [mm] [N/mm] approx. of screws Size [Nm] [min -1 ] [10-6 kgm 2 ] [10-3 Nm/arcmin] axial ± lateral axial radial [g] [Nm]) 0,4 0, ,3 50 0,35 0, ,9 0, ,4 90 0,3 0, , ,5 0, , ,4 0, ,6 0, ,8 0, ,7 0, Material: - bellows: stainless steel - hubs: high tensile strength aluminium - screws: DIN nickel plated Dimensions: (mm) length dimensions according to DIN ISO 2768 ch MKM Ø a b c f h l ±0,5 Ø D1/2min Ø D1/2max 0,4 16,5 9 4,6 M 2,5 3, ,35 0,9 16,5 9 4,6 M 2,5 3,3 31,5 3 6, ,5 (27,5) 13 7,5 (9,6) M 3 4, (14) 4 24,5 (27,5) 13 7,5 (9,6) M 3 4,4 43, (14) M ,5 (44,5) 16,5 13 (15,5) M (21) 12 39,5 (44,5) 16,5 13 (15,5) M (21) On request the couplungs from size 2-12 are avaiable with EASY - clamp. (see page 8) Stock bores D1/D2 (G7) MKM Ø 3 Ø 4 Ø 5 Ø 6 Ø 6,35 Ø 8 Ø 9,53 Ø 10 Ø 12 Ø 15 Ø 16 Ø19 0,4 / 0,9 2 / 4 7 8/12 Remark: Different boresizes are possible on request. Ordering example: MKM 0,9 - D1 = 4 G7 D2 = 5 G7 29

31 Miniature - metal bellows coupling Technical data: Series MKP short design - with radial clamping hub temperature range: -100 bis +300 C max. moment torsional max. shaft spring rate mass tightening torque MKP TN speed of inertia stiffness displacement [mm] [N/mm] approx. of screws Size [Nm] [min -1 ] [10-6 kgm 2 ] [10-3 Nm/arcmin] axial ± lateral axial radial [g] [Nm] , ,3 0, , ,3 0, ,4 0, ,5 0, ,4 0, Material: - bellows: stainless steel - hubs: high tensile strength aluminium - screws: DIN nickel plated Dimensions: (mm) length dimensions according to DIN ISO 2768 ch MKP Ø a b c f h l ±0,5 Ø D1/2min Ø D1/2max 2 24,5 (27,5) 13 7,5 (9,6) M 3 4, (14) 5 24,5 (27,5) 13 7,5 (9,6) M 3 4, (14) M ,5 (44,5) 16,5 13 (15,5) M (21) 12 39,5 (44,5) 16,5 13 (15,5) M (21) On request all are avaiable with EASY - clamp. (see page 8) Stock bores: D1/D2 (G7) MKP Ø 4 Ø 5 Ø 6 Ø 6,35 Ø 8 Ø 9,53 Ø 10 Ø 12 Ø 15 Ø 16 Ø 19 2 / / 12 Remark: Different boresizes are possible on request. Ordering example: MKP 5 - D1 = 4 G7 D2 = 12 G7 30

32 Miniature - metal bellows coupling Technical data: Series MKA cost-effective version with set screws temperature range: -20 bis +150 C max. moment torsional max. shaft spring rate mass tightening torque MKA TN speed of inertia stiffness displacement [mm] [N/mm] approx. of screws Size [Nm] [min -1 ] [10-6 kgm 2 ] [10-3 Nm/arcmin] axial ± lateral axial radial [g] [Nm] 0,4 0, , ,35 0, ,9 0, , ,3 0, , ,5 0, , ,4 0, ,6 0, ,8 0, Material: - bellows: stainless steel - hubs: high tensile strength aluminium - setscrews: DIN 916 Dimensions: (mm) length dimensions according to DIN ISO 2768 ch MKA Ø a b f h l ±0,5 ØD1/2min ØD1/2max 0, x M 3 2, , x M 3 2,3 27, x M 4 3, x M 4 3,5 39, ,5 2x M 5 4, x M , Stock bores D1/D2 (G7) MKA Ø 3 Ø 4 Ø 5 Ø 6 Ø 6,35 Ø 8 Ø 9,53 Ø 10 Ø 12 Ø 15 Ø 16 Ø 19 Ø 24 0,4 / 0,9 2 / Remark: Different boresizes are possible on request. For a easier disassemblage we recommend to have end faces on the shaft. Ordering example: MKA 2 - D1 = 6 G7 D2 = 8 G7 31

33 Miniature- elastomer coupling Technical data: Series MJT/MJT-C MJT-C: standard series with radial clamping hub MJT: cost - effective version with set screws temperature range: -20 till +70 C max. moment torsional max. shaft mass tightening torque MJT T N speed of inertia stiffness displacement [mm] approx. of screws Size [min [Nm] ] [10-6 kgm 2 ] [10-3 [Nm] Nm/arcmin] axial ± lateral [ g ] MJT / MJT-C MJT / MJT-C f i 14-B 0, / ,21 / 0,16 3 0,6 0,15 7 0,7 0,5 20-B 1, / ,0 / 1,1 5 0,8 0, , B / ,9 / 6,2 13 1,0 0, ,7 2,5 14-R / ,21 / 0,16 7 0,6 0,10 7 0,7 0,5 20-R / ,0 / 1,1 16 0,8 0, , R 12, / ,9 / 6,2 38 1,0 0, ,7 2,5 MJT Material: - hub: aluminium alloy - Elastomer spider: polyurethane B 80-Sh-A (blue), R 98-Sh-A (red) MJT-C Dimensions: (mm) length dimensions according to DIN ISO 2768 mh MJT Ø a c e g h l f i ,5 22 2x M3 M , x M3 M2, ,5 35 2x M4 M4 Stock bored D1/D2 (H8) MJT MJT-C MJT Ø 3 Ø 4 Ø 5 Ø 6 Ø 6,35 Ø 8 Ø 9,53 Ø 10 Ø 12 Ø Remark: Different boresizes are possible on request. For a easier disassemblage of the MJT size we recommend to have end faces on the shaft. Ordering example: MJT-B 30 - D1 = 8 H8 D2 = 10 H8 MJT-C-R 20 - D1 = 5 H8 D2 = 6 H8 32

34 Miniature - Oldham - type coupling Technical data: Series MOS standard series with radial clamping hub temperature range: -20 till +80 C max. moment torsional max. shaft mass tightening torque MOS TN speed of inertia stiffness displacement approx. of screws Size [Nm] [min -1 ] [10-7 kgm 2 ] [10-3 Nm/arcmin] lateral [mm] angular [ ] [g] [Nm] 12C 0, ,71 3 0, ,5 16C 0, ,0 9 1, C 0, ,4 14 1, C 1, , ,5 32C 2, , ,5 Material: - hub: aluminium alloy - spacer: polyacetal Dimensions: (mm) length dimensions according to DIN ISO 2768 mh MOS Ø a b c h l f 12C ,5 14,9 M 2 16C ,5 21 M 2,5 20C ,5 3,5 22,1 M 2,5 25C ,2 M 3 32C ,3 M 4 Stock bores D1/D2 (H8) MOS Ø 3 Ø 4 Ø 5 Ø 6 Ø 6,35 Ø 8 Ø 9,53 Ø 10 Ø 12 Ø 14 12C 16C 20C 25C 32C Remark: Different boresizes are possible on request. Ordering example: MOS-25-C - D1 = 8 H8 D2 = 10 H8 33

35 Miniature - Oldham - type coupling Technical data: Series MOL cost - effective version with set screws temperature range: -20 to +80 C max. moment torsional max.shaft mass tightening torque MOL TN speed of inertia stiffness displacement(mm) approx. of screws Size [Nm] [min -1 ] [10-6 kgm 2 ] [10-3 Nm/arcmin] lateral [mm] angular [ ] [g] [Nm] 16 0, ,32 9 1, ,7 20 1, ,0 17 1, , ,0 41 2, , ,5 82 2, Material: - hub: aluminium alloy - spacer: polyacetal Dimensions: (mm) length dimensions according to DIN ISO 2768 mh MOL Ø a b h l f ,5 18 M ,5 23 M ,5 28 M ,5 33 M 6 Stock bores D1/D2 (H8) MOL Ø 4 Ø 5 Ø 6 Ø 6,35 Ø 8 Ø 9,53 Ø 10 Ø 12 Ø Remark: Different boresizes are possible on request. For a easier disassemblage we recommend to have end faces on the shaft. Ordering examle: MOL-32 - D1 = 8 H8 D2 = 10 H8 34

36 Distance general This category comprises several coupling series which can span axial distances of up to 6 m of length. The common main characteristic feature of all types is an intermediate pipe resp. a metal bellow part, which is variable in length and can fit exactly the required applications of the customer. In many cases, they can be used as spacer shaft (synchronizing shaft) and can substitute conventionel constructions of intermediate shafts with complicated additional intermediate bearings. Misalignments, especially parallel misalignments, can be compensated to a higher extend. Furthermore the stainless material and the easy assembly of all series must be emphasized. A secure, frictional connection with easy operation is given because of the hub design in half-shell version (series WB, WBA, KLH) resp. with sliding hub (series EKZ). Characteristics: as connecting shaft without additional intermediate bearing - maintenance free high torsional stiffness - compensation of displacements - very easy to fit - high speed up to 6 m axial distance - backlash free, exact torque transfer - stainless design The customer can chose between three standard series with aluminium intermediate pipe: Series EKZ length 0,2-3 m 6 sizes up to 700 Nm Tmax=120 C elastomer spider plug-in sliding hub oscillation dampening cost effective type for medium speed in-house production of the intermediate pipe is possible Series WD length 0,3-6 m 6 sizes up to 1600 Nm Tmax=140 C metal bellows integrated cardan joint great pipe dimensions for maximum speed and high torsional stiffness Series WDA length 0,2-3 m 6 sizes up to 500 Nm Tmax=300 C metal bellows integrated cardan joint cost effective type with reduced operating parameters pipe connection detachable in-house production of the intermediate pipe is possible EKZ - coupling for lifting table drive WD - Coupling for multi-axis linear module 35

37 Distance assembly The splitted hub-, or the shifting hub design allows for an easy assembly. Further simplification during installation is provided because one half of the split hub is screwed onto the pipe. This allows that the coupling can rest on the two shaft ends. The second half of the split hub can be then mounted to the coupling by screwing it on from below with the specified tightening torque. This feature makes a one man assembly possible even with extremely long. During maintenance, the WB coupling can be exchanged without disassembling the drive or output units. Notice: The maximum allowed speed is dependent of the total length L and the pipe dimensions. At high rotational speed above 2000 min -1 and simultaneous long dimension L>2m please contact JAKOB. Formulas for length determination: A= shaft seperation ± 1 L = A + t1 + t2 [mm] t = plug in depth ± 1 (see data sheets) Series EKZ plug in hub mountening length - intermediate pipe clamp-connection with shifting seat to pipe end Series WD splitted hub design glued- or welded connection to pipe Series WDA splitted hub design clamping connection to pipe detachable 36

38 Distance intermediate pipe Processing dimensions for intermediate pipes - Series WDA / EKZ: For series WDA and EKZ there is a possibility for the end- user to produce the intermediate pipe by himself. This is reducing delivery time as well as shipping costs. The required tightening torques for the clamping hub fixing at both pipe ends must be pointed out at assembling. pipe length LP = Ltotal length - X t type / size Series WDA Series EKZ X Ø Da min. Ø 30 Ø 40 Ø 44 Ø 55 Ø 70 Ø 20 Ø 28 Ø 30 Ø 35 Ø 50 Ø 60 Ø Dk j6 Ø 28 Ø 38 Ø 42 Ø 53 Ø 68 Ø 19 Ø 26 Ø 28 Ø 33 Ø 46 Ø 58 Lk ,5 65, Sk min recommended Ø50x8 Ø60x8 Ø70x8 Ø30x5 Ø40x5 Ø20x5 Ø30x6 Ø30x6 Ø35x6 Ø50x8 Ø60x8 pipe dimensions (Ø45x5) (Ø55x5) (Ø70x5) notice: - mateial of the intermediate pipe: aluminium e.g.: Al Mg Si 0,5 F 22 (alternative Steel or stainless steel ) - at weighty dissenting pipe dimensions please call JAKOB integrated cardan joint - WD integrated cardan joint - WDA The intermediate pipe can be delivered in different types of material and section thickness, as well as for high speed in straightened and balanced quality. At high speed and concurrent big pipe length the custom- designed optimized CFK - intermediate pipes will be used. (see Photos above) 37