FLENDER UZWN overrunning clutches with FLENDER KSUN clutch shift Types UZWN and KSUN Operating instructions FLENDER couplings
FLENDER UZWN overrunning clutches with FLENDER KSUN clutch shift Types UZWN and KSUN Operating instructions Translation of the original operating instructions Technical data Notes Fitting Start-up and operation Faults, causes and remedy Maintenance and repair Stocking spare parts 1 2 3 4 5 6 7 2 / 25
Notes and symbols in these operating instructions Note: The term "operating instructions" will in the following also be shortened to "instructions" or "manual". Legal notes Warning-note concept This manual comprises notes which must be observed for your personal safety and for preventing material damage. Notes for your personal safety are marked with a warning triangle or an "Ex" symbol (when applying Directive 94/9/EC), those only for preventing material damage with a "STOP" sign. WARNING! Imminent explosion! The notes indicated by this symbol are given to prevent explosion damage. Disregarding these notes may result in serious injury or death. WARNING! Imminent personal injury! The notes indicated by this symbol are given to prevent personal injury. Disregarding these notes may result in serious injury or death. WARNING! Imminent damage to the product! The notes indicated by this symbol are given to prevent damage to the product. Disregarding these notes may result in material damage. NOTE! The notes indicated by this symbol must be treated as general operating information. Disregarding these notes may result in undesirable results or conditions. WARNING! Hot surfaces! The notes indicated by this symbol are made to prevent risk of burns due to hot surfaces and must always be observed. Disregarding these notes may result in light or serious injury. Where there is more than one hazard, the warning note for whichever hazard is the most serious is always used. If in a warning note a warning triangle is used to warn of possible personal injury, a warning of material damage may be added to the same warning note. Qualified personnel The product or system to which these instructions relate may be handled only by persons qualified for the work concerned and in accordance with the instructions relating to the work concerned, particularly the safety and warning notes contained in those instructions. Qualified personnel must be specially trained and have the experience necessary to recognise risks associated with these products or systems and to avoid possible hazards. 3 / 25
Intended use of Siemens products Observe also the following: Trademarks Siemens products must be used only for the applications provided for in the catalogue and the relevant technical documentation. If products and components of other makes are used, they must be recommended or approved by Siemens. The faultfree, safe operation of the products calls for proper transport, proper storage, erection, assembly, installation, start up, operation and maintenance. The permissible ambient conditions must be adhered to. Notes in the relevant documentations must be observed. All designations indicated with the registered industrial property mark are registered trademarks of Siemens AG. Other designations used in these instructions may be trademarks the use of which by third parties for their own purposes may infringe holders rights. Exclusion of liability We have checked the content of the instructions for compliance with the hard and software described. Nevertheless, variances may occur, and so we can offer no warranty for complete agreement. The information given in these instructions is regularly checked, and any necessary corrections are included in subsequent editions. Note on the EC Machinery Directive 2006/42/EC Siemens couplings in the "FLENDER couplings" product range must be treated as "components" in the sense of the EC Machinery Directive 2006/42/EC. Therefore, Siemens needs not issue a declaration of incorporation. Information on safe fitting, safe startup and safe operation can be found in this instructions manual; in addition the "warning note concept" therein must be observed. 4 / 25
Contents 1. Technical data... 6 1.1 Torques, speeds, geometric data and weights... 6 1.1.1 Sizes 325 / 450 / 560 / 660... 6 1.1.2 Sizes 330 / 460 / 610... 8 1.2 General description of the UZWN overrunning clutch... 10 1.3 General description of the KSUN clutch shift... 11 2. Notes... 12 2.1 Safety instructions and general notes... 12 3. Fitting... 13 3.1 Notes to the fit pairs of the bore and shaft... 13 3.2 Fitting the UZWN overrunning clutch... 13 3.2.1 Fitting the UZWN overrunning clutch, sizes 325 / 450 / 560 / 660... 13 3.2.2 Fitting the UZWN overrunning clutch, sizes 330 / 460 / 610... 14 3.3 Possible misalignments... 15 3.3.1 Axial misalignment... 15 3.3.2 Angular misalignment... 15 3.3.3 Radial misalignment... 15 3.4 Alignment... 15 3.5 Shaft misalignment values during operation... 16 3.6 Fitting the KSUN clutch shift... 16 3.7 Assignment of tightening torques... 18 4. Start up and operation... 18 5. Faults, causes and remedy... 19 5.1 Possible cause of the fault... 19 5.2 Incorrect use... 19 5.2.1 Frequent faults when selecting the overrunning clutch and/or the size of the overrunning clutch... 19 5.2.2 Frequent faults when fitting the overrunning clutch... 20 5.2.3 Frequent faults in maintenance... 20 6. Maintenance and repair... 20 6.1 Maintenance interval... 20 6.1.1 UZWN overrunning clutch... 20 6.1.2 KSUN clutch shift... 20 6.2 Replacement of the bellows (50)... 21 6.3 Demounting the KSUN clutch shift... 21 6.4 Demounting the UZWN overrunning clutch, sizes 325 / 450 / 560 / 660... 21 6.5 Demounting the UZWN overrunning clutch, sizes 330 / 460 / 610... 21 7. Stocking spare parts... 22 7.1 Spare parts... 22 5 / 25
1. Technical data The instructions describe the overrunning clutch with clutch shift in horizontal mounting position with shaft hub connection by cylindrical bore with parallel key. Where other shaft hub connections are to be used (e.g. conical bores with parallel key, shrink fit or splines to standard "DIN 5480") Siemens should be consulted. If a dimensioned drawing has been made out for the clutch, the data in this drawing must be given priority. The dimensioned drawing including any other documents should be made available to the user of the system. Part numbers and part designations can be found in the spare parts drawing and spare parts list in section 7 or on the dimensioned drawing. 1.1 Torques, speeds, geometric data and weights 1.1.1 Sizes 325 / 450 / 560 / 660 3) 4) U W 1 3 C E S2 2 X 1) ND1 D1 v NL1 v S v NL2 v D2 ND2 DA 2) Fig. 1: UZWN overrunniung clutch, sizes 325 / 450 / 560 / 660 1) Left hand version, counter clockwise 2) Right hand version, clockwise 3) Drive side 4) Output side Table 1: Speeds, geometric data and weights of the UZWN overrunning clutch, Sizes 325 / 450 / 560 / 660 Output Input Bore 1) Stroke Weight Size n max. D1 D2 ND1 ND2 U W NL1 v S S2 E X C m NL2 DA from-to 2) 1/min mm mm mm mm mm mm mm mm mm mm mm mm mm kg 325.1 325.2 450.1 450.2 560.1 560.2 660.1 660.2 2900 1500 2100 1100 1700 850 1400 750 60 100 60 110 80 150 90 160 90 180 100 190 150 230 160 240 80 125 80 145 100 170 100 200 125 200 140 225 140 225 170 250 178 200 220 240 275 300 320 300 340 425 340 380 155 195 190 230 270 320 280 340 1) Maximum bore with keyway to standard "DIN 6885/1" 2) Weights are valid for maximum bores. 145 185 180 220 260 310 270 330 170 210 210 250 300 350 320 380 55 70 70 80 100 120 110 120 50 80 35 8.0 60 106 45 9.0 5 70 133 55 9.5 80 145 65 9.5 96 115 224 239 435 495 735 850 6 / 25
1) 2) g3 h H 4) X 25 77 B1 O P L1 X F3 G1 G2 F1 F2 S 3) Fig. 2: KSUN clutch shift, sizes 325 / 450 / 560 / 660, manually operated with blocking 1) Shift position DISENGAGED 2) Shift position ENGAGED 3) Fastening of the base plate 4) Blocking optionally at right hand or left hand side Table 2: Geometrical data and weights of the KSUN clutch shift, sizes 325 / 450 / 560 / 660 Size B1 L1 h H F1 F2 F3 O P G1 G2 g3 S Weight mm mm mm mm mm mm mm mm mm mm mm mm for kg 325 475 276 240 750 90 42 200-69.5 390 398 90 470 478 130 M16 58 450 550 270 320 880 160 69.5 210 13 69.5 480 490 104 560 570 144 M20 60 560 680 280 400 1000 180 70 210 35.5 70 670 680 169 770 780 219 M20 70 660 740 290 650 1330 160 79.5 300 32.4 79.5 720 730 175 840 850 235 M20 90 7 / 25
1.1.2 Sizes 330 / 460 / 610 3) U W 4) 1 E 3 2 S2 X 1) v v ND1 D1 NL1 NL2 D2 ND2 DA S 2) Fig. 3: UZWN overrunniung clutch, sizes 330 / 460 / 610 1) Left hand version, counter clockwise 2) Right hand version, clockwise 3) Drive side 4) Output side Table 3: Speeds, geometric data and weights of the UZWN overrunning clutch, sizes 330 / 460 / 610 Output Input Bore 1) 2) 3) Stroke Weight Size n max.. D1 D2 ND1 ND2 U W NL1 NL2 v S S2 E X m DA from-to min. min. min. 4) 1/min mm mm mm mm mm mm mm mm mm mm mm mm mm kg 330 2900 1500 60 160 80 200 210 300 195 100 210 170 55 40 5 127 37 96 460 2100 1100 80 270 100 280 320 420 213 170 250 250 80 50 5 136.5 55 287 610 1500 800 100 360 120 370 420 560 250 250 350 350 120 60 5 156.5 65 765 1) Maximum bore with keyway to standard "DIN 6885/1" 2) Minimum dimension NL1, hub extension up to 2 x NL1 possible 3) Minimum dimension E, extension depends on NL1 4) Weights are valid for maximum bores at minimum dimension NL1 8 / 25
1) 2) g3 77 h H 4) X 25 B1 O P L1 X F3 G1 F2 F1 S 3) Fig. 4: KSUN clutch shift, sizes 330 / 460 / 610, manually operated with blocking 1) Shift position DISENGAGED 2) Shift position ENGAGED 3) Fastening of the base plate 4) Blocking optionally at right-hand or left-hand side Instead of manually operated the clutch shift can also be operated pneumatically, see manual BA 3001.1. Table 4: Geometrical data and weights of the KSUN clutch shift, sizes 330 / 460 / 610 Size B1 L1 h H F1 F2 F3 O min. P G1 min. g3 S Weight mm mm mm mm mm mm mm mm mm mm mm for kg 330 475 276 240 750 90 42 200 33 69.5 420 83 M16 58 460 680 280 400 1000 180 70 210 35.5 70 600 114 M20 70 610 740 290 650 1330 160 80 300 33 79.5 760 193.5 M20 90 9 / 25
1.2 General description of the UZWN overrunning clutch 101 1 51 50 52 8 7 3 11 10 5 6 201 2 1) 101 1 51 50 52 300 3 11 10 5 13 12 6 201 2 2) Fig. 5: UZWN overrunning clutch 1) Sizes 325 / 450 / 560 / 660 2) Sizes 330 / 460 / 610 The type UZWN overrunning clutch is a directionally actuated freewheel clutch. Clutch part 1 is fitted on the motor or a driving gear unit shaft. The clutch part 2 is fitted on the driven machine shaft or driven gear unit shaft. The overrunning clutch is engaged in the stationary condition by shifting the clutch part 3 axially. As soon as the speed of clutch part 2 is higher than that of clutch part 3, independent disengagement caused by the angled faces of the engaging dogs on clutch part 2 and part 3 takes place. Motor and driven machine unit are then disengaged mechanically. The overrunning clutch is suitable only for horizontal arrangement. Engage clutch part 3 only when it is in the stationary condition. The overrunning clutch may be optionally constructed as a left hand version for counter clockwise rotation or as a right hand version for clockwise rotation, seen from the driving shaft end (clutch part 3). 10 / 25
1.3 General description of the KSUN clutch shift 3 2 5 1 19 16 15 15 X 20 40 17 18 41 42 7 8 10 11 6 14 12 13 X Fig. 6: KSUN clutch shift, manually operated with blocking The KSUN clutch shift is suitable for attachment to and operation of the UZWN overrunning clutch. The shifting fork (1) engages in the groove around clutch part 3 by the cam rollers (19) and shifts the UZWN overrunning clutch. The shift fork (1) can be manually operated by means of the shift lever (5). The shift position of the UZWN overrunning clutch is identified by proximity indicators. The signals can be transmitted to a control system. The clutch shift must be actuated only while the machine is at a standstill. Attention! Danger of squeezing. When the UZWN overrunning clutch overruns, clutch part 3 is pushed back. The clutch shift moves into the "disengaged" position in jerks. During overrun disengagement is jerky. Attention! There is a risk of injury through the movement of the clutch shift. The clutch shift is retained by means of the locking piece (15) until manual engaging. The UZWN overrunning clutch must not be held in an engaged position against axial forces, e.g. from the work process. 11 / 25
2. Notes 2.1 Safety instructions and general notes All persons involved in the installation, operation, maintenance and repair of the overrunning clutch or the clutch shift must have read and understood these instructions and must comply with them at all times. Disregarding these instructions may cause damage to the product and material and/or injury to persons. Damage caused by disregard of these instructions will result in exclusion of liability. During transport, installation, dismantling, operation and maintenance of the unit, the relevant safety and environmental regulations must be complied with at all times. Lifting gears and load equipment for handling the unit must be suitable for the weight of the overrunning clutch or clutch shift. Dispose of the overrunning clutch or clutch shift in accordance with national regulations or separate them for recycling. The overrunning clutch and clutch shift must be stored in a dry environment. Adequate preservation must be carried out. Operators and users must not make any changes to the overrunning clutch or clutch shift themselves over and above the action specified in these instructions. If there is any visible damage the overrunning clutch or clutch shift must not be fitted and not be put into operation. The overrunning clutch or clutch shift must not be operated unless housed in a suitable enclosure in accordance with the standards applying. This also applies to test runs and when checking the direction of rotation. All work on the overrunning clutch or clutch shift must be carried out only when it is at a standstill. Secure the drive unit to prevent unintentional switch on! A notice should be attached to the ON switch stating clearly that work on the overrunning clutch or clutch shift is in progress. In addition to any generally prescribed personal safety equipment (such as safety shoes, safety clothing, helmet) handling the overrunning clutch or clutch shift requires wearing suitable safety gloves and suitable safety glasses. Only spare parts made by the manufacturer Siemens must be used. Any enquiries should be addressed to: Siemens AG Schlavenhorst 100 46395 Bocholt Tel.: +49 (0)2871 / 92-0 Fax: +49 (0)2871 / 92-2596 12 / 25
3. Fitting The clutch parts are supplied in finished condition in accordance with the order. A set screw to standard "DIN 916" with cup point must be used when securing the clutch parts. If the clutch part fitted on the shaft does not lie up against the shaft shoulder, we recommend using grooved spacer rings. The overrunning clutches are balanced to the customer's specifications. 3.1 Notes to the fit pairs of the bore and shaft Check the fits of the bores and the shafts. Table 5: Fit recommendation for bores with parallel key connection Description Push fit Press fit Interference fit not suitable for reversing operation suitable for reversing operation Shaft tolerance j6 h6 h6 k6 m6 n6 h6 Bore tolerance H7 J7 K7 H7 H7 H7 M7 The fit assignment m6 / H7 is particularly suitable for many applications. Failure to observe these instructions may result in breakage of the overrunning clutch. Danger to life from flying fragments. 3.2 Fitting the UZWN overrunning clutch 3.2.1 Fitting the UZWN overrunning clutch, sizes 325 / 450 / 560 / 660 The subassembly clutch part 1 (1; 3; 5; 6; 7; 8; 10; 11; 50; 51; 52) is delivered in pre assembled condition. Unscrew the set screw. Clean the bores and shaft ends. The bellows (50) must not come into contact with solvents and cleaning agents. Insert parallel keys in the shaft ends. Undo the screw connection (51; 52) on the subassembly clutch part 1 (1; 3; 5; 6; 7; 8; 10; 11; 50; 51; 52) and demount the bellows (50). Undo cheese head screws (11) and demount dust protection (10). Push bellows (50) onto shaft. Coat the bores of the coupling parts (1; 2) and the shafts with MoS 2 mounting paste (e.g. Microgleit LP 405). Mount clutch part 1 and clutch part 2, heat up to maximum 150 C, if necessary. Axial securing is effected by means of the set screw. Clutch part 3 must be shifted on clutch part 1 in order to enable the set screw to be tightened. Fit the set screw (for tightening torque of the set screw see table 8). Failure to observe these instructions may result in breakage of the coupling. Danger to life from flying fragments. With bolts (51) fasten the bellows (50) to clutch part 1 and with bolts (52) to clutch part 3. 13 / 25
With cheese head screw (6) fasten stop (5) (for tightening torques, see table 7). With cheese head screws (11) screw dust protection (10) to clutch part 3 (for tightening torques, see table 7). Align the clutch as described in item 3.3. 3.2.2 Fitting the UZWN overrunning clutch, sizes 330 / 460 / 610 Unscrew the set screw. Clean the bores and shaft ends. The bellows (50) and the dust protection (10) must not come into contact with solvents and cleaning agents. Design the parallel key connection with an additional safety factor of 1.3 of the required minimum safety. Manfacture the parallel key using a hardened or very strong material. Connect the parallel key to the machine shaft using retaining screws, in order to ensure the correct position of the parallel key in the shaft keyway. Insert parallel keys into the shaft ends and bolt on. Coat the bores of the clutch parts (1; 2) and shafts with MoS 2 mounting paste (e. g. Microgleit LP 405). Mount clutch part 1 and clutch part 2, heat up to maximum + 150 C, if necessary. Axial securing is effected by means of the set screw. Fit the set screw (for tightening torque of the set screw, see table 8). Push bellows (50) with hose clip (51) onto clutch part 1 and fit. Oil the bore in clutch part 3 (oil viscosity VG32) and pull on the shaft. With cheese head screw (12) fasten stop (5) (for tightening torques, see table 7). With cheese head screws (52) fasten the bellows (50) to clutch part 3. With cheese head screws (11) fasten the dust protection (10) to clutch part 3 and with bolts (12) and the sleeves (13) fitted behind the plate fasten to stop (5) (for tightening torques see table 7). Align the clutch as described in item 3.4. 14 / 25
3.3 Possible misalignments S2 min. S2 min. ΔKw ΔKr S2 max.. S2 max.. 1) 2) 3) Fig. 7: Possible misalignments 1) Axial misalignment (ΔKa) 2) Angular misalignment (ΔKw) 3) Radial misalignment (ΔKr) 3.3.1 Axial misalignment The gap dimension ΔKa should be set within the deviation permitted for the dimension "S2" (see table 6). 3.3.2 Angular misalignment The angular misalignment ΔKw can be measured as difference of the gap dimension (ΔS2 = S2 max. S2 min. ) ΔS2 perm. see table 6. If required, the permissible angular misalignment ΔKw can be calculated as follows: ΔKw perm. in RAD = ΔS2 perm. / DA ΔS2 perm. see table 6. ΔKw perm. in DEGREE = (ΔS2 perm. / DA) x (180 / π) "DA" in mm, see section 1. 3.3.3 Radial misalignment The permissible radial misalignment ΔKr perm. can be found in table 6. 3.4 Alignment When aligning, the angular and radial misalignment should be kept as low as possible. Misalignment values specified in table 6 are maximum permissible overall values in operation, resulting from mispositioning through imprecision during alignment and misalignment through operation (e.g. deformation through load, heat expansion). Reduced misalignment in the clutch minimises expected wear on the flexible elements. Misalignment in the clutch gives rise to restorative forces which may impose inadmissible stress on adjacent machine parts (e.g. bearings). 15 / 25
3.5 Shaft misalignment values during operation The following maximum permissible misalignment values must by no means be exceeded during operation. When aligning, the angular and radial misalignment should be kept as low as possible. Table 6: Shaft misalignment values ΔS perm. and ΔKr perm., maximum permissible during operation Axial misalignment Angular misalignment Radial misalignment Size ΔKa ΔKw perm ΔKr perm S2 S2 max.. S2 min. mm mm mm 325.1 325.2 330 450.1 450.2 460 560.1 560.2 610 660.1 660.2 4... 6 0.15 0.15 4... 6 0.20 0.20 4... 6 0.25 0.25 4... 6 0.30 0.30 3.6 Fitting the KSUN clutch shift Using lifting gear transport the clutch shift by the eye bolts (9). Mount the clutch shift after fitting and aligning the overrunning clutch. Demount the shift fork (1) by removing the retaining pins (11) and locking rings (10). The base plate (7) can then be bolted to the foundation. Remove eye bolts (9). Use quality 8.8 screws or higher for fastening. Fit the shift fork (1) with the retaining pins (11) and the locking rings (10) so that the cam rollers (16) engage in the groove running around clutch part 3. Align the base plate to ensure that the two cam rollers (16) are in even contact with the side of the groove and both bearings act at an axial height at more or less the same depth in the groove. Mark the position of the locking piece (15) on the shift fork (1) for the shift DISENGAGED position and at this point drill a hole with diameter d = 12 mm. Check that the locking piece (15) locks in correctly. Check tightening torques against item 3.7 and, if necessary, retighten the bolts. 16 / 25
Fit the B20 and B40 proximity indicators, as described. Gap dimension between proximity indicator and UZWN overrunning clutch = 3 ± 0.5 mm. Engage and disengage the UZWN overrunning clutch manually and signals. Signals B20 and B40 must not be given at the same time. 3 ± 0.5 1 2 3 1 2 1) 2) Fig. 8: Fitting the proximity indicators 1) UZWN overrunning clutch, shift position DESENGAGED 2) UZWN overrunning clutch, shift position "ENGAGED 1 B20 proximity indicator 2 B40 proximity indicator 3 Eye bolt, Part no. 9 The control system of the main drive must be connected to the proximity indicators of the clutch shift. While the main drive is running, no attempt must be made to switch the auxiliary drive on. The proximity indicators are designed by Messrs. TURCK in PNP design, NO contact. 17 / 25
3.7 Assignment of tightening torques The use of impact screwdrivers is not permissible. Tightening torques apply to bolts with untreated surfaces which are not or only lightly oiled (coefficient of friction μ = 0.14). The use of lubricant paint or lubricant which affects the coefficient of friction "μ" is not permitted. The specified tightening torques "T A " must be complied with, applying standard "DIN 25202 / 1992-04", Screw Connection Class "C", with an output torque scatter of ± 5 %. Tighten hexagon head bolt (12) for fastening the sliding bearings (14) to 25 Nm and secure medium firmly with LOCTITE. Table 7: Tightening torques of nuts and bolts Size M 6 M 8 M 10 M 12 M 16 M 20 M 24 M 30 Tightening torque T A in Nm 10 25 49 86 210 410 710 1450 Table 8: Tightening torques of the set screws Bore range Set-screw size Tightening torque over up to T A mm mm Nm 38 65 M 10 15 65 95 M 12 25 95 110 M 16 70 110 150 M 20 130 150 230 M 24 230 230 600 M 30 470 4. Start up and operation Check bolt tightening torques for the overrunning clutch and tightening torques for the foundation bolts of the coupled machine before start up. Check the position and operation of the proximity indicators to determine the shift position. Enclosures (coupling protection, contact prevention at least IP2X) must be fitted. Overload conditions during start up cannot be excluded. If the overrunning clutch breaks through overload, metal parts may fly off and cause personal injury and/or material damage. Follow the following switching on procedure for start up and subsequent operation. Manual operation of the clutch shift Main motor "OFF" Shift position DISENGAGED UZWN overrunning clutch is disengaged, the proximity indicator has gives signal B20. Shift KSUN clutch shift mechanically and adjust UZWN overrunning clutch. If signal B40 is given, start auxiliary drive, then enable main drive. If signal B40 is not given, start auxiliary drive briefly and once more try to adjust KSUN clutch shift. The overrunning clutch must run with little noise and without vibration. Irregular behaviour must be treated as a fault requiring immediate remedy. In case of fault the drive must be stopped at once. The necessary measures for repair must be taken in accordance with the safety regulations applying. 18 / 25
5. Faults, causes and remedy Table 9: Faults, dangers and measures Changes in running noise; Vibrations Faults Dangers Measures Sliding surfaces contaminated. 5.1 Possible cause of the fault Failure of the plant. Change in alignment: Rectify the cause of the change in alignment (e.g. loose foundation bolts). Align the overrunning clutch. Check axial fastening; adjust as necessary. Sliding surfaces contaminated: Clean, check and, if necessary, replace clutch parts and shift components. 5.2 Incorrect use Trouble-shooting in accordance with item 5.1 and item 5.2 and remedy the cause. Check all parts of the coupling for any damage. Replace damaged parts. For re-assembly, the instructions in sections 3 and 4 must be observed. Failure to observe these instructions may result in breakage of the overrunning clutch. Danger to life from flying fragments. 5.2.1 Frequent faults when selecting the overrunning clutch and/or the size of the overrunning clutch Important information for describing the drive and the environment are not communicated. System torque too high. System speed too high. Application factor not correctly selected. Chemically aggressive environment is not taken into consideration. The ambient temperature is not permissible. Finished bore with inadmissible diameter and/or inadmissible fit assignment. Machining of parallel keyways of which the width across corners is greater than the width across corners of the parallel keyways to standard "DIN 6885/1" with a maximum permissible bore. The transmission capacity of the shaft hub connection is not appropriate to the operating conditions. Maximum load or overload conditions are not being taken into consideration. Dynamic load conditions are not being taken into consideration. Shaft hub connection resulting in impermissible material stress on the overrunning clutch. Operating conditions are being changed without authorisation. 19 / 25
5.2.2 Frequent faults when fitting the overrunning clutch Components with transport or other damage are being fitted. The shaft diameter is beyond the specified tolerance range. Coupling parts are being interchanged, i. e. their assignment to the specified shaft is incorrect. Specified axial fastenings are not fitted. Specified tightening torques are not being adhered to. Bolts are inserted dry or greased. Flange surfaces of screwed connections have not been cleaned. Alignment and/or shaft misalignment values do not match the specifications in the instructions manual. The coupled machines are not correctly fastened to the foundation, and as a result shifting of the machines e.g. through loosening of the foundation screw connection is causing excessive displacement of the coupling parts. The coupled machines are not sufficiently earthed. The coupling guard used is not suitable. 5.2.3 Frequent faults in maintenance Maintenance intervals are not being adhered to. No genuine spare parts are being used. Old or damaged spare parts are being used. Leakage in the vicinity of the overrunning clutch is not being identified and as a result chemically aggressive media are damaging the overrunning clutch. Fault indications (noise, vibrations, etc.) are not being observed. Specified tightening torques are not being adhered to. Alignment and/or shaft misalignment values do not match the specifications in the instructions manual. 6. Maintenance and repair 6.1 Maintenance interval 6.1.1 UZWN overrunning clutch Check tightness and porosity of the bellows (50) regularly, at least once yearly. Oil sizes 330 / 460 / 610 regularly, at least once yearly, via grease nipple (300) with VG 32 oil. Clean the track of the KSUN clutch shift cam rollers (16) regularly, at least once yearly, with a cleaning cloth. Slightly grease the sliding surfaces of clutch parts 1 (1) and 3 (3) with a bruch. For this work, the clutch must be switched off. 6.1.2 KSUN clutch shift Clean the cam rollers regularly, at least once yearly, with a cleaning cloth. Regularly, at least once yearly, grease the cam rollers via grease nipples. 20 / 25
6.2 Replacement of the bellows (50) Replacing the bellows is only possible after complete demounting of the clutch (see item 6.4 or item 6.5). 6.3 Demounting the KSUN clutch shift Remove locking rings (10) and locking pins (11). Remove the shift lever (1). 6.4 Demounting the UZWN overrunning clutch, sizes 325 / 450 / 560 / 660 Move the coupled machines apart. Undo screws (51; 52) and slide the bellows (50) onto the shaft. Undo cheese head screws (11) and remove the dust protection (10). Undo cheese head screws (6) and remove the stop (5). Remove clutch part 3. Remove set screw. Mount a suitable detaching device. Using a burner, heat coupling part (1; 2) along its length and above the parallel keyway (max. + 80 C). Pull the clutch part off. Examine the hub bore and the shaft for damage, and protect against rust. Replace damaged parts. For re assembly, the instructions in sections 3 and 4 must be observed. 6.5 Demounting the UZWN overrunning clutch, sizes 330 / 460 / 610 Move the coupled machines apart. Undo screws (51; 52) and slide the bellows (50) onto the shaft. Undo cheese head screws (11; 12) and remove the dust protection (10) and bushes (13). Undo hexagon head screw (6) and remove the stop (5). Remove clutch part 3. Remove set screw. Mount a suitable detaching device. Using a burner, heat coupling part (1; 2) along its length and above the parallel keyway (max. + 80 C). Pull the clutch part off. Examine the hub bore and the shaft for damage, and protect against rust. Replace damaged parts. For re assembly, the instructions in sections 3 and 4 must be observed. 21 / 25
7. Stocking spare parts 7.1 Spare parts For ordering spare parts state the following data, as far as possible: Siemens order number and position Siemens drawing number Type and size of the overrunning clutch Part numer (see spare parts list) Bore, bore tolerance, keyway and balancing as well as particular characteristics. Special details such as temperature, electrically insulating. 101 1 51 50 52 8 7 3 11 10 5 6 201 2 Fig. 9: Spare parts drawing UZWN overrunning clutch, sizes 325 / 450 / 560 / 660 Table 10: Spare parts list UZWN overrunning clutch, sizes 325 / 450 / 560 / 660 Part num. Designation Part num. Designation Part num. Designation 1 Clutch part 1 7 Parallel key 51 Hexagon-head bolt 2 Clutch part 2 8 Cheese-head bolt 52 Hexagon-head bolt 3 Clutch part 3 10 Dust protection 101 Set screw 5 Stop 11 Cheese-head bolt 201 Set screw 6 Cheese-head bolt 50 Bellows 22 / 25
101 1 51 50 52 300 3 11 10 5 13 12 6 201 2 Fig. 10: Spare parts drawing UZWN overrunning clutch, sizes 330 / 460 / 610 Table 11: Spare parts list UZWN overrunning clutch, sizes 330 / 460 / 610 Part num. Designation Part num. Designation Part num. Designation 1 Clutch part 1 10 Dust protection 51 Hose clip 2 Clutch part 2 11 Cheese-head bolt 52 Cheese-head bolt 3 Clutch part 3 12 Cheese-head bolt 201 Set screw 5 Stop 13 Bush 300 Grease nipple 6 Hexagon-head bolt 50 Bellows 101 Set screw 23 / 25
3 2 5 1 19 16 15 X 20 40 17 18 41 42 7 8 14 10 12 11 6 13 X Fig. 11: Spare parts drawing KSUN clutch shift, manually operated with blocking Table 12: Spare parts list KSUN clutch shift, manually operated with blocking Part num. Designation Part num. Designation Part num. Designation 1 Shift fork 10 Locking ring 18 Cheese-head bolt 2) 2 Hexagon-head bolt 11 Locking pin 19 Washer 3 Hexagon nut 12 Hexagon-head bolt 20 Proximity indicator 1) 5 Hand lever 13 Washer 40 Proximity indicator 1) 6 Adaptor plate 14 Sliding bearing 41 Holder 7 Base plate 15 Locking piece 2) 42 Hexagon-head bolt 8 Pedestal bearing 16 Cam roller 9 Eye bolt 1) 17 Holder 2) 1) The position of the eye bolt is shown in figure 8. 2) only on version with locking piece 24 / 25
Further Information: "FLENDER gear units" on the Internet www.siemens.com/gearunits "FLENDER couplings" on the Internet www.siemens.com/couplings Service & Support: http://support.automation.siemens.com/ww/view/en/10803928/133300 Lubricants: http://support.automation.siemens.com/ww/view/en/42961591/133000 Siemens AG Industry Sector Mechanical Drives Alfred-Flender-Straße 77 46395 Bocholt GERMANY Subject to modifications Siemens AG 2012 www.siemens.com/drive technologies