Linear actuator with track roller guidance system and toothed belt ...

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94Safety guidelines and symbolsHigh product safetyStatements to be observedDefinition of guidelinesand symbolsWarningCautionNote!❏✓Our products correspond to the current level of research andtechnology. If the bearing arrangement is correctly designed,if the products are handled and fitted correctly and as agreedand if they are maintained as instructed, they do not give riseto any immediate hazards.This publication gives descriptions of standard products.Since these are used in numerous applications, we cannot makea judgement as to whether any malfunctions will cause harm topersons or property.It is always and fundamentally the responsibility of the designerand user to ensure that all specifications are observed and that allnecessary safety information is communicated to the end user.This applies in particular to applications in which product failureand malfunction may endanger persons.The warning and hazard symbols are defined along the lines ofANSI Z535.6-2006.The meaning of the guidelines and symbols is as follows.If they are not observed, death or serious injury may occur.If they are not observed, minor or slight injury will occur.If they are not observed, damage or malfunctions in the productor the adjacent construction will occur.There follows additional or more detailed information that mustbe observed.Numbers within a circle are item numbers.Squares with a shaded border are placed in front of instructions.Tick marks indicate preconditions.Industrial Technologies2 MON 73 Schaeffler Group Industrial

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94ContentsSafety guidelinesand symbolsPageHigh product safety ................................................................... 2About this manual The purpose of this manual ....................................................... 5Target group .............................................................................. 5Safety guidelinesfor linear actuatorsOverviewof the linear actuatorFittingin the adjacent constructionFitting and mountingof accessoriesUse for the intended purpose .................................................... 6General safety guidelines .......................................................... 6Personnel selection and qualification ........................................ 7Use of replacement parts........................................................... 7Scope of delivery ....................................................................... 8Available designs ...................................................................... 10Location of the support rail on the adjacent construction........... 12Fixing the carriage to the adjacent construction ......................... 15Coupling housing ...................................................................... 16Coupling.................................................................................... 17Maintenance Maintenance requirements........................................................ 18Maintenance intervals ............................................................... 18Relubrication............................................................................. 19Cleaning .................................................................................... 21Removal and dismountingof componentsFitting and mountingof componentsLinear actuator .......................................................................... 22Toothed belt unit ....................................................................... 22Drive unit and return unit........................................................... 25Carriage..................................................................................... 27Linear actuator .......................................................................... 28Carriage..................................................................................... 29Drive unit and return unit........................................................... 32Toothed belt unit ....................................................................... 33Industrial TechnologiesSchaeffler Group Industrial MON 73 3

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94ContentsPageVariants Available variant ....................................................................... 39Multiple carriages ..................................................................... 40Replacement parts Toothed belt.............................................................................. 41Drive unit .................................................................................. 41Return unit ................................................................................ 42Carriage .................................................................................... 42Support rail ............................................................................... 43Appendix Accessories............................................................................... 44Tightening torques .................................................................... 45Industrial Technologies4 MON 73 Schaeffler Group Industrial

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94About this manualThe purpose of this manualHow to use the manualTarget groupThis fitting and maintenance manual is valid exclusively forthe linear actuator MLFI25-ZR.It describes the secure fitting and maintenance of thelinear actuator.❑ This manual should be read carefully in full before starting anyfitting or maintenance work.❑ The manual must be stored throughout the life of thelinear actuator.❑ Please ensure that the manual is accessible at all times tothe target group.❑ The manual must be forwarded to each subsequent owner oroperator of the linear actuator or the machine or equipment inwhich the linear actuator is fitted.The target group of this manual comprises the operator andtrained skilled personnel charged with the fitting and maintenanceof the linear actuators described.Industrial TechnologiesSchaeffler Group Industrial MON 73 5

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94Safety guidelines for linear actuatorsUse for the intended purposeGeneral safety guidelinesRisk reductionFundamental instructionsThe linear actuator is intended exclusively for moving machinecomponents connected to the carriage.Any other use is not for the intended purpose and is thereforeimpermissible. The Schaeffler Group accepts no liability for anydamage or loss arising therefrom.❑ Any actions and methods that endanger the safety of humanbeings must not be carried out.❑ In all fitting and maintenance work, the following must beobserved:– all nationally valid and relevant specifications forthe prevention of accidents– all generally recognised rules of safety practice andoccupational medicine.The linear actuator is constructed in accordance with the currentlevel of technology and the recognised rules of safety practice.Nevertheless, while it is being used the user or third parties may beput at risk or the linear actuator and other material assets may beimpaired.Risks can be reduced by observing the following points:❑ The linear actuator should only be operated if it is free fromtechnical defects.❑ The linear actuator should only be used for the intended purposeand with an awareness of safety and hazards.❑ If any malfunctions occur that have safety implications,the linear actuator must be stopped immediately and themalfunction rectified by a person with appropriateresponsibility.The assembly and fitting of the linear actuator as well as the fittingand dismantling of the individual components must only be carriedout as described in this manual:❑ Carry out the operations in the specified sequence.❑ Use the listed tools and fitting accessories correctly.Tools and fitting accessories that are unsuitable, damaged orcontaminated will impair the function of the linear actuator.❑ Screws must only be tightened using a torque wrench andthe specified torques must be observed.❑ Use rubber hammers only, not metal hammers.❑ Do not use pointed or sharp-edged tools.Industrial Technologies6 MON 73 Schaeffler Group Industrial

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94Personnel selectionand qualificationProviding information to personnelDisclaimer of liabilityUse of replacement partsUse of products from other sourcesDisclaimer of liabilityPersons charged with the fitting and maintenance of thelinear actuator must have adequate qualification. They mustreceive appropriate training and instruction before carrying outfitting or maintenance work.The fitting and maintenance manual must be available in a suitableform to the nominated persons (for example as a printout).This includes drawing explicit attention to the hazard and safetyguidelines in this manual.The Schaeffler Group does not accept any liability for harm tohuman beings, the linear actuator and the adjacent constructionthat can be attributed to:■ incorrect fitting■ incorrect or inadequate maintenance■ incorrect communication of the content to third parties ora failure to communicate the content.Special INA replacement parts have been developed for the linearactuator MLFI25-ZR. These ensure the reliable and long termfunction of the linear actuator.❑ Do not use replacement parts other than original replacementparts from INA, see page 41.The use of products from other sources instead of INA replacementparts can:■ change the characteristics of the linear actuator in a negativemanner■ endanger users or third parties■ cause impairment to the linear actuator and other materialassets.The Schaeffler Group accepts no liability for any damage or lossarising from the use of products from other sources.Industrial TechnologiesSchaeffler Group Industrial MON 73 7

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94Overview of the linear actuator Support rail with raceway shafts Drive unit(return mechanism on drive side) Toothed belt unit Carriage with profiled track rollers Return unit(return mechanism on non-driven side)Figure 1Subassembliesof linear actuator MLFI25-ZR00015EFAScope of delivery ■ Support rail with raceway shafts .■ Drive unit .12Industrial Technologies8 MON 73 Schaeffler Group Industrial

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 9443Scope of delivery– continued■ Toothed belt unit .Toothed belt and toothed belt clamping devices:The toothed belt is fixed to the carriage by means of the twoclamping devices.■ Carriage with profiled track rollers .■ Return unit .5Industrial Technologies00015EFBSchaeffler Group Industrial MON 73 9

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94Ordering designationOrdering exampleDesignThe ordering number can be found engraved on one side ofthe support rail.Ordering number MLFI25-ZR-AL/4 000-3 735VariantsLinear actuator with enclosedtrack roller guidance systemMLFISize 25Drive type: single toothed beltZRDrive shaft on left sideALNumber of carriages 1Total length of actuator4 000 mmStroke length of actuator3 735 mmVariants of the standard designs are shown in the chapter Variants,see page 39.Industrial TechnologiesSchaeffler Group Industrial MON 73 11

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94Fitting in the adjacent constructionThe linear actuator is fitted in two steps:■ the support rail is fixed to the adjacent construction■ the carriage is fixed to the adjacent construction.Location of the support railon the adjacent constructionNote!INA connecting bracketsThe support rail can be located on the adjacent construction usingthe following accessories:■ clamping lugs, see page 13■ fixing brackets, see page 13■ T-nuts to DIN 508, see page 14■ T-bolts to DIN 787, see page 14■ hexagonal nuts to DIN 934, see page 14.Under normal loads, location by means of clamping lugs,fixing brackets or T-nuts, T-bolts etc. is normally sufficient.Multi-axis handling systems comprising INA linear actuators can beconstructed using INA connecting brackets.Detailed information on the connecting brackets can befound in INA publication Fasteners and connecting brackets forlinear actuators (TPI 153).If linear actuators are located incorrectly, this can damage thelinear actuator itself and the adjacent construction.❑ Note the maximum tightening torques for the fixing screws,see page 45.❑ Note the maximum spacings for the fasteners.❑ Ensure that the adjacent construction has adequate strength.Industrial Technologies12 MON 73 Schaeffler Group Industrial

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94Location of the support railusing clamping lugsor fixing brackets❑ If the support rail is fully in contact with the adjacentconstruction, clamping lugs or fixing brackets should be fittedon the left and right sides of the support rail at intervalsof max. 333 mm.A = 73 mmB = 88 mmFigure 2Location using clamping lugs00015EF7ABmax. 1,0 m❑ Under high loads, the support rail should be fixed at shorterintervals or additionally by means of T-nuts or other accessoriesnamed on page 12.Industrial TechnologiesSchaeffler Group Industrial MON 73 13

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94Fitting in the adjacent constructionFixing the support railby means of T-nuts❑ If the support rail is fully in contact with the adjacentconstruction, T-nuts should be fitted in both profiled slots atintervals of max. 300 mm.Note!The following accessories can be used instead of T-nuts:■ T-bolts■ hexagonal nuts.B = 40 mmFigure 3Fixing by means of T-nutsB❑ Under high loads, the support rail should be fixed at shorterintervals or additionally by means of clamping lugs or fixingbrackets.30030030000015EF8Industrial Technologies14 MON 73 Schaeffler Group Industrial

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94Fixing the carriageto the adjacent constructionFixing the carriageThe carriage is fixed by means of:■ T-nuts to DIN 508■ T-bolts to DIN 787■ T-strips■ hexagonal nuts to DIN 934.If linear actuators are located incorrectly, this can damage the linearactuator itself and the adjacent construction.❑ Note the maximum tightening torques for the fixing screws,see page 45.❑ Ensure that the adjacent construction has adequate strength.❑ Protect the raceway of the carriage against contamination.❑ Carriages must be fixed to the adjacent construction inaccordance with the loads and the forces acting on them.Industrial TechnologiesSchaeffler Group Industrial MON 73 15

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94Fitting and mounting of accessoriesFor the linear actuator MLFI25-ZR, INA offers specially developedaccessories, see chapter Appendix, page 44.This chapter shows the fitting of the following accessories:■ coupling housing■ coupling.Coupling housingWarningFitting the coupling housingFigure 4Screw mounting of the couplingRemoving the coupling housingThe following tools are required:■ torque wrench■ Allen key or hex key inserts.Sudden start of the machine.Crushing of fingers between the linear actuator and machine parts.❑ Before starting work, disconnect the machine from the powersupply.❑ Secure the main switch of the machine against switching on.❑ Remove the black protective cap from the drive shaft,see Figure 11, page 25.❑ Slide the coupling housing over the drive shaft.The larger opening must face towards the adjacent construction.❑ Screw mount the coupling housing to the support rail usingfixing screws.– MLFI25-ZR: M5/5,5 Nm.✓ Coupling removed.❑ Loosen the fixing screws.❑ Remove the coupling housing in the direction of the drive shaft.00015EE6Industrial Technologies16 MON 73 Schaeffler Group Industrial

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94CouplingWarningFitting the coupling Hole in the coupling housingFigure 5Screw mounting of the couplingRemoving the couplingThe following tools are required:■ torque wrench■ Allen key or hex key inserts.Sudden start of the machine.Crushing of fingers between the linear actuator and machine parts.❑ Before starting work, disconnect the machine from the powersupply.❑ Secure the main switch of the machine against switching on.✓ Coupling housing fitted.✓ Coupling firmly screw mounted on the motor side to the driveshaft.❑ Slide the coupling onto the drive shaft of the drive unit.There must be a gap of approx. 2 mm left between the couplingand the end face of the housing on the actuator side.❑ Rotate the coupling so that the fixing screw is accessible viathe hole in the coupling housing.❑ Fully tighten the fixing screw. The fixing screw and tighteningtorque will differ according to the coupling used, for informationsee INA publication ALE, Driven Linear Units.1❑ Rotate the coupling so that the fixing screw is accessible viathe hole in the coupling housing.❑ Loosen the fixing screw.❑ Remove the coupling in the direction of the drive shaft.Industrial Technologies00015EE7Schaeffler Group Industrial MON 73 17

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94MaintenanceMaintenance requirementsVisual inspectionMaintenance intervalsMaintenance accordingto operating conditionsNote!Maintenance work is restricted to:■ relubrication■ cleaning.Maintenance work may require the removal and refitting ofcomponents, see page 22 onwards.In order to ensure exact function and a long operating life ofthe linear actuator, it must be visually inspected for damage andcontamination at regular intervals.Maintenance intervals, especially the intervals betweenrelubrication, are influenced by:■ travel speed and drive torque■ loading■ temperature■ stroke length■ environmental conditions (cleanliness etc.).It is not possible to calculate all the influences on maintenanceintervals. The intervals can therefore only be determined preciselyunder operating conditions.The interval lengths stated in the following sections are maximummaintenance intervals. They must be shortened for each individualcase depending on the types of influences present.Industrial Technologies18 MON 73 Schaeffler Group Industrial

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94RelubricationWhen should relubricationbe carried out?Note!What should be usedfor relubrication?Note!What is the relubrication quantity?Relubrication quantityCarriageNote!Relubrication is necessary for:■ carriages.The relubrication interval is dependent on the environmentalconditions. Relubrication times and quantities can only bedetermined precisely under operating conditions.Relubrication must be carried out:■ as a function of the applicationThis must be determined in accordance with the operatingconditions.■ as soon as fretting corrosion 1) occurs.If fretting corrosion occurs, the lubrication intervals shoulddefinitely be reduced.For relubrication of the carriage, oils CL and CLP to DIN 51 517 witha viscosity of ISO-VG 220 are recommended.Detailed information on recommended lubricants can be foundin the INA publication ALE, Driven Linear Units. The INA publicationcan be requested through info.linear@schaeffler.com.Guide values for the required quantity of oil are dependent onthe length of the carriage.Carriage lengthRelubrication quantity for carriage (guide values)130 mm approx. 1 ml to 2 ml250 mm approx. 2 ml to 3 ml500 mm approx. 2 ml to 3 mlIt is more advisable to carry out relubrication at several pointsduring the maintenance interval, using partial quantities in eachcase, than relubrication at the end of the interval using the entirequantity.1) Fretting corrosion can be identified by a reddish discolouration ofthe raceway shafts or the outside surface of the track rollers.Industrial TechnologiesSchaeffler Group Industrial MON 73 19

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94MaintenanceRelubrication of carriagesHoles for relubricationThe carriage is lubricated via felt inserts integrated in the carriage.Relubrication is carried out via holes in the carriage.The holes are located on the longitudinal sides of the carriage. Holes for relubricationFigure 6Holes for relubricationWarningRelubrication of carriages1Relubrication can be carried out from either the left or right side.Sudden start of the machine.Crushing of fingers between the carriage and machine parts.❑ Before starting work, disconnect the machine from the powersupply.❑ Secure the main switch of the machine against switching on.✓ Linear actuator warm from operation.✓ Hole for relubrication clean and accessible.❑ Remove the grub screw from the hole.❑ Feed the required lubricant quantity into the hole.❑ If possible, move the carriage by hand during lubrication in orderto distribute the oil evenly.❑ Close the hole again using the grub screw.100015EDAIndustrial Technologies20 MON 73 Schaeffler Group Industrial

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94CleaningWhen should cleaningbe carried out?Cleaning of componentsafter removalWhat should be usedfor cleaning?Cleaning must be carried out if heavy contamination is present.The cleaning requirements are dependent on the environmentaland application conditions and can only be determined inthe operational state.If components must be removed or the linear actuator must bedismantled, the components should be cleaned before refitting.Damage due to unsuitable cleaning tools or cleaning agents.❑ Do not use pointed, hard or abrasive objects.❑ Do not dampen lubricated components during cleaning.❑ Do not use abrasives, petroleum spirit, oil etc.Suitable cleaning tools are:■ paint brush■ soft brush■ soft cloths.Industrial TechnologiesSchaeffler Group Industrial MON 73 21

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94Removal and dismounting of componentsLinear actuatorNote!Toothed belt unit Toothed beltClamping device: Lower clamping piece Upper clamping piece Fixing screw Spacer Adjusting screwFigure 7Overview of toothed belt unitWarningThe linear actuator is dismantled in the following sequence:■ remove the toothed belt, see page 23 to page 24■ remove the drive unit or return unit, see page 25 to page 26■ remove the carriage, see page 27.It is only necessary in exceptional cases to completely disassemblethe linear actuator.The toothed belt unit comprises the toothed belt andtwo clamping devices. The clamping devices connect the toothedbelt to the carriage.213Sudden start of the machine.Crushing of fingers between the carriage and machine parts.❑ Before starting work, disconnect the machine from the powersupply.❑ Secure the main switch of the machine against switching on.45600015EE4Industrial Technologies22 MON 73 Schaeffler Group Industrial

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94Removal and dismounting of componentsDetaching the second clampingdevice from the carriageNote!Removing the toothed beltFigure 10Removing the toothed belt❑ Detach the second clamping device from the carriage, but do notremove the clamping pieces from the toothed belt.The second clamping device must only be removed fromthe toothed belt if the clamping device itself or the toothed beltmust be replaced. Dismounting of the second clamping device isnot necessary in order to remove the toothed belt unit.❑ Grip the toothed belt by the clamping device and pull it out ofthe support rail.00015EDEIndustrial Technologies24 MON 73 Schaeffler Group Industrial

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94Drive and return unitThe drive unit and return unit differ according to the design.However, both components are dismounted in the same way. Toothed belt pulley with bearing Snap rings Protective caps End coverFigure 11Overview of drive unitRemoving the drive unitor return unitPreparing for removalFigure 12Removing the end coverThe following tools are required:■ snap ring pliers■ removal tool.4✓ Toothed belt removed, see page 23.✓ In the case of the drive unit: motor, coupling and couplinghousing removed, see page 17 and page 16.❑ Remove the black end cover from the support rail.13200015EE500015EE8Industrial Technologies❑ Remove the round protective caps.Schaeffler Group Industrial MON 73 25

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94Removal and dismounting of componentsRemoving the toothed belt pulley❑ Remove the snap ring.Figure 13Removing the snap ringDamage to the toothed belt pulley and support rail due tounsuitable tools.❑ Do not use pointed or sharp-edged tools.❑ Do not use a hammer.❑ Remove the toothed belt pulley using a press-out tool.00015EF3Industrial Technologies26 MON 73 Schaeffler Group Industrial

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94CarriageIt is only necessary to remove the carriage if it is to be replaced bya new carriage.Carriages differ according to the design. However, they are alldismounted in the same way. Hole for relubrication Protective cap for eccentric bolt Profiled track rollers Felt inserts for relubricationFigure 14Overview of carriageDamage due to contaminated lubricant.The characteristics of oil may change due to contamination.❑ The work area must be cleaned before removing the carriage.❑ Elements with oil must be laid only on a clean, lint-free underlay.Removal of carriage ✓ Drive unit or return unit removed, see page 25.Removing the carriage1 24Damage due to incorrect removal.❑ While removing the carriage, hold it concentric and parallel tothe support rail.❑ Push out the dowel pin at the open end of the support rail.❑ Remove the carriage carefully from the support rail.3Industrial Technologies00015EE2Figure 15Removing the carriage00015EDFSchaeffler Group Industrial MON 73 27

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94Fitting and mounting of componentsLinear actuatorA completely disassembled linear actuator is reassembled inthe following sequence:■ fit the carriage, see page 29 to page 31■ fit the drive unit and return unit, see page 32■ insert the toothed belt, see page 34 to page 35■ fix the toothed belt to the carriage, see page 36■ preload the toothed belt, see page 37 to page 38.Industrial Technologies28 MON 73 Schaeffler Group Industrial

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94Carriage A component overview is shown in Figure 14, page 27.The following tools are required:■ torque wrench■ Allen key or hex key inserts■ ring wrench.Damage due to incorrect fitting.❑ Hold the profiled track rollers with the correct fit at the level ofthe raceway shafts.❑ Hold the carriage concentric and parallel to the support rail.❑ Ensure that the carriage runs without clearance over the wholelength of the support rail.❑ After fitting, relubricate the raceway shafts.Fitting the carriage ✓ Drive unit or return unit removed, see page 25.✓ Dowel pin pushed out.Preparing the carriage Protective cap on eccentric boltFigure 16Protective cap on eccentric bolt❑ Remove the black protective cap on the eccentric bolt.1❑ Loosen the nut of the eccentric bolt until the eccentric bolt canbe turned.❑ Turn the profiled track roller of the eccentric bolt towardsthe centre of the carriage.Industrial Technologies00015EE3 Profiled track roller with eccentric boltFigure 17Turning the profiled track rollertowards the centre of the carriage100015EF6Schaeffler Group Industrial MON 73 29

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94Fitting and mounting of componentsSliding the carriageonto the support rail❑ Slide the carriage carefully onto the raceway shafts.Figure 18Sliding the carriageonto the raceway shafts00015EE0Industrial Technologies30 MON 73 Schaeffler Group Industrial

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94Setting the profiled track rollersclearance-free❑ Turn the eccentric bolt until the carriage sits without clearance onthe raceway shafts. While doing this, move the carriage by hand.Figure 19Turning the eccentric boltFigure 20Tightening the nuton the eccentric boltNote!Finishing the fitting procedure❑ Tighten the nut of the eccentric bolt to a tightening torqueof 15 Nm. Ensure that the eccentric bolt does not rotate as well.❑ Move the carriage by hand and check whether it can movewithout clearance over the whole length of the support rail.If the carriage cannot move without clearance over the wholelength of the support rail, please contact Application Engineeringat the Linear Technology Division.❑ Press the protective cap into the recess for the eccentric bolt.❑ Drive in the dowel pin on the support rail.00015EF400015EF5Industrial TechnologiesSchaeffler Group Industrial MON 73 31

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94Fitting and mounting of componentsDrive unit and return unit A component overview is shown in Figure 11, page 25.The following tools are required:■ snap ring pliers.✓ Carriage fitted, see page 29 to page 31.Fitting the drive unitor return unitFitting the toothed belt pulleyFigure 21Fitting the snap ringFinishing the fitting procedureThe drive unit and return unit differ according to the design.However, both components are mounted in the same way.Damage to the toothed belt pulley and support rail due tounsuitable tools.❑ Do not use pointed or sharp-edged tools.❑ Do not use a hammer.❑ Press the toothed belt pulley into the support rail until it isin contact with the snap ring at the back.❑ Fit the front snap ring.❑ Fit the protective caps.00015EF3Industrial Technologies32 MON 73 Schaeffler Group Industrial

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94Toothed belt unit A component overview is shown in Figure 7, page 22.Overview of fittingNote!Starting pointThe toothed belt is fitted in 3 steps:■ insert the toothed belt■ fix the toothed belt to the carriage■ preload the toothed belt.The following tools are required:■ torque wrench■ Allen key or hex key inserts■ screwdriver.If the toothed belt is refitted after removal, it must be set to the samepreload as before removal, see page 37.The following instructions are based on the assumption thatthe toothed belt is inserted into the support rail end of the drive unit.Industrial TechnologiesSchaeffler Group Industrial MON 73 33

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94Fitting and mounting of componentsFitting the toothed belt ✓ Drive unit and return unit fitted, see page 32.Inserting the toothed belt❑ Insert the toothed belt into the lower hollow section ofthe support rail. The teeth of the toothed belt must face upwards.Figure 22Inserting the toothed beltinto the support railFigure 23Feeding the toothed beltonto the toothed belt pulley❑ Insert the toothed belt until it reaches the toothed belt pulley ofthe return unit.Damage to the toothed belt due to unsuitable tools.❑ Do not use pointed or sharp-edged tools.❑ In the return unit, push the toothed belt upwards with the aid ofa screwdriver and feed it onto the teeth of the toothed belt pulley.❑ Feed the toothed belt over the toothed belt pulley and pull it outfar enough until its other end is below the drive unit.❑ Feed the toothed belt in the drive unit onto the teeth ofthe toothed belt pulley.❑ Feed the toothed belt pulley over the toothed belt pulleyand pull it out.00015EF200015EE1Industrial Technologies34 MON 73 Schaeffler Group Industrial

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94Fitting the end covers❑ Mount the black end covers on the ends of the support rail.Figure 24Fitting the end coverIndustrial Technologies00015EE8Schaeffler Group Industrial MON 73 35

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94Fitting and mounting of componentsAttaching the toothed beltto the carriage❑ Screw mount the upper and lower clamping pieces of the firstclamping device to the toothed belt:– MLFI25-ZR: M4/2,7 Nm.Figure 25Screw mounting the clampingdevice to the toothed beltFigure 26Screw mounting the clampingdevice to the carriage❑ Screw mount the clamping device to the carriage usingthe adjusting screw:– MLFI25-ZR: M5/5,5 Nm.❑ Screw mount the second clamping device to the toothed belt:– MLFI25-ZR: M4/2,7 Nm.❑ Screw mount the clamping device to the carriage loosely enoughthat the toothed belt is not yet tensioned.00015EDC00015EDBIndustrial Technologies36 MON 73 Schaeffler Group Industrial

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94Preloading the toothed beltduring refittingPreloading a new toothed beltFigure 27Measurement length marked(not to scale)Figure 28Measurement length preloaded(not to scale)When refitting a toothed belt that has been removed:❑ Reinsert the stored spacer between the clamping deviceand the carriage.❑ Tighten the clamping device with a torque of M5/5,5 Nm tothe hard stop.When fitting a new toothed belt:❑ Mark a measurement length of 1 000 mm on the untensionedtoothed belt.In order to increase the measurement accuracy,themeasurement length can be extended in the case oflonger linear actuators (2 000 mm, 3 000 mm etc.).❑ Tighten the adjusting screw on the second clamping device untilthe measurement length is extended by 1 mm per 1 000 mm.Industrial Technologies00015ED800015ED9Schaeffler Group Industrial MON 73 37

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94Fitting and mounting of componentsInserting the spacer❑ Measure the gap between the clamping device and carriage usinga vernier.❑ Select one spacer corresponding to the width of the gap.If a single spacer is not sufficient, select 2 or more spacers thattogether correspond to the width of the gap.❑ Insert the spacer in the gap between the carriage and clampingdevices.❑ Tighten both clamping devices with a torque of M5/5,5 Nm tothe hard stop.Industrial Technologies38 MON 73 Schaeffler Group Industrial

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94VariantsAvailable variantCarriageSuffix inordering designation2 driven carriages W2Ordering exampleDesignLinear actuator with enclosedtrack roller guidance systemMLFISize 25Carriage length250 mmDrive type: single toothed beltZRDrive shaft on both sidesRLTwo carriagesW2Total length of actuator4 000 mmStroke length of actuator3 735 mmOrdering designation MLFI25-250-ZR-RL-W2/4 000-3 735Industrial TechnologiesSchaeffler Group Industrial MON 73 39

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94VariantsMultiple carriagesFitting of multiple carriagesFixing the toothed beltbetween carriagesFigure 29Linking carriagesusing separate piece of toothed beltFitting the toothed beltIf the linear actuator has more than one carriage, these are linked byindividual pieces of toothed belt.The following tools are required:■ rubber hammer■ torque wrench■ Allen key or hex key inserts■ screwdriver.✓ All carriages slid onto raceway shafts, see page 29 to page 31.❑ Fit short pieces of toothed belt with clamping devices and usethese to link the carriages, see page 36.❑ Fit the long piece of toothed belt, see page 34 onwards.00015EFDIndustrial Technologies40 MON 73 Schaeffler Group Industrial

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94Replacement partsNote!The precise design of your linear actuator is dependent on yourorder. When ordering replacement parts, please indicatethe ordering number of your linear actuator. The ordering numbercan be found engraved on one side of the support rail.Toothed beltReplacement parts listfor toothed beltDrive unitReplacement parts listfor drive unitLinear actuator Designation MATNRMLFI25-ZR ZHRI25-AT-5 001288261-0000Linear actuator Designation MATNRDrive shaft on left or right sideMLFI25-ZR WE.MLFI25-ZR-AR-7800 001256319-0000Drive shaft on both sidesMLFI25-ZR WE.MLFI25-ZR-RL-7800 002454599-0000Industrial Technologies00015F0100015EFCSchaeffler Group Industrial MON 73 41

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94AppendixAccessoriesLocationCoupling, gearbox, motorSpecial INA replacement parts have been developed forthe linear actuator. These ensure the reliable and long term functionof linear actuators.AccessoryClamping lugsT-nutsSlot closing stripsConnecting bracketsAs a system supplier, the Schaeffler Group also offers componentsincluding coupling housings, couplings, gearboxes and motors.These components are precisely matched to the linear actuator.1) i = ratio.Article numberSPPR2420MU-DIN508-M45MU-M55-POSMU-M68-POSNAD55,7See INA publication Fasteners and connectingbrackets for linear actuators (TPI 153)Coupling Coupling housing Gearbox 1) MotorKUP50-40-2-12H7/16H7KGEH25/36000-MLFI-ZRPL 70..-i MOT-SMH60MOT-SMH82KUP50-40-MOT-SMH602-11H7/12H7KUP50-40-2-12H7/14H7KGEH25/36200-MLFI-ZRMOT-SMH82Comprehensive information can be found in INA publication ALE,Driven Linear Units and on the Internet at www.schaeffler.com.Industrial Technologies44 MON 73 Schaeffler Group Industrial

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94Tightening torquesThe correct tightening torques are shown in the table.Screw Grade Tightening torqueNmM4 8.8 2,710.9 4,312.9 5,1M5 8.8 5,510.9 8,412.9 10,2M6 8.8 9,510.9 14,712.9 17,6M8 8.8 2310.9 35,312.9 42,2M10 8.8 4610.9 6712.9 78M12 8.8 8010.9 11512.9 135Industrial TechnologiesSchaeffler Group Industrial MON 73 45

Индастриал Технолоджис www.ind-techno.com.ua +38 044 498 21 94MON 73 / GB-D / 200910 / pdf onlySchaeffler KGLinear Technology DivisionBerliner Straße 13466424 Homburg/Saar (Germany)Internet www.ina.comE-Mail info.linear@schaeffler.comIn Germany:Phone 0180 5003872Fax 0180 5003873From other countries:Phone +49 6841 701-0Fax +49 6841 701-2625Every care has been taken to ensure thecorrectness of the information containedin this publication but no liability can beaccepted for any errors or omissions.We reserve the right to make technicalchanges.© Schaeffler KG · 2009, OctoberThis publication or parts thereof may notbe reproduced without our permission.MON 73 GB-DIndustrial Technologies