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Summary of Contents for Schaeffler YRTC
- Page 1 High Precision Bearings for Combined Loads Fitting and maintenance manual...
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Page 3: Table Of Contents
Checking the bearing frictional torque ........19 Checking running accuracy............19 Checking the fixing screws ............20 Lubrication ....................21 Relubrication of bearings ............22 Overlubrication................. 25 Initial operation ................ 25 Further information Publication requests ..............26 Schaeffler Technologies MON 100... -
Page 4: About The Mounting Manual Symbols
The content of this fitting and maintenance manual must be communicated to the end user. Usage for Axial/radial bearings YRT, YRTC and YRTS and axial angular contact ball bearings ZKLDF are envisaged for use in chip-forming machine the intended purpose tools and in particular for the bearing arrangements of high precision rotary axes in milling and turning machines. -
Page 5: Safety Guidelines
If the adjacent construction is different, fit the bearing appropriately or contact us for advice. Schaeffler Technologies MON 100... - Page 6 Shock loads can damage the lattice structure of the measurement cover ring ring and lead to measurement errors. (YRTCMA, YRTSMA and YRTCMI) The cover ring is manufactured from stainless steel and must not be removed, but must remain on the inner ring. MON 100 Schaeffler Technologies...
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Page 7: Preparations For Fitting Bearings With Magneto-Resistive Angular Measuring System
Bearings with Axial/radial bearings YRTCM and YRTSM correspond in mechanical terms to series YRTC and YRTS, but are additionally fitted with magneto-resistive angular a magnetically coded measurement ring and a protective strip. measuring system Measurement rings are manufactured from a composite material that has a magnetic multipolar arrangement. - Page 8 (guide value: at least 100 mm distance in air or 10 mm unalloyed steel). Minimum distance 100 mm Figure 1 Minimum distance between magnetic measurement stand and magnetic measurement ring Shielding 10 mm Figure 2 Shielding by unalloyed steel MON 100 Schaeffler Technologies...
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Page 9: Bearings With Inductive Angular Measuring System
Bearings with Axial/radial bearings YRTCMA, YRTSMA and YRTCMI correspond in mechanical terms to series YRTC and YRTS, but are additionally fitted inductive angular measuring with a measurement ring, which can be scanned by inductive means, system and a cover ring. -
Page 10: Delivered Condition Of The Bearings
■ YRTS, YRTSM and YRTSMA with a lubricating grease according to Arcanol L ■ YRTC, YRTCM, YRTCMA, YRTCMI and ZKLDF with a lubricating grease according to Arcanol M ULTITOP The rotational resistance is heavily dependent on the greasing of the bearing. The frictional torque values given in... -
Page 11: Compatibility And Miscibility With Anti-Corrosion Agents
Legal regulations on environmental protection and on health and safety at work in the respective country of use must be observed, in addition to application information provided by the manufacturer of the product used. Schaeffler Technologies MON 100... -
Page 12: Removing Bearings From Packaging
Only use lifting gear, tackle and cranes that are designed, tested and approved for the specific intended purpose. The presence or movement of persons, or body parts, under sus- pended loads is not permitted. MON 100 Schaeffler Technologies... - Page 13 Heavy bearings must only be transported using a hoist attached to the eye bolts or by means of textile slings. Figure 4 Storage lying flat Figure 5 Transport using hoist and eye bolts Schaeffler Technologies MON 100...
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Page 14: Design Of Fitting Area
Contamination will impair the function and operating life of the bearings. To prevent corrosion, ensure your hands are clean and dry. Wear safety gloves. The bearings must be protected against moisture and aggressive media. Figure 6 Design of fitting area MON 100 Schaeffler Technologies... -
Page 15: Protection Measures During Fitting
Ensure that all adjacent components and lubrication holes are free from cleaning agents, solvents, washing emulsions and detaching particles. If the adjacent construction and lubrication holes are not completely clean, the raceway system may become contaminated or the fit surfaces may rust. Schaeffler Technologies MON 100... -
Page 16: Selection Of Fasteners
As fixing screws, use cylinder head screws of grade 10.9 to DIN EN ISO 4762 only. For other grades, please contact Schaeffler. The user should ensure a screw connection with the adjacent ... -
Page 17: Fitting Checking The Dimensional And Running Accuracy Of The Bearings
For ZKLDF bearings, loosen the retaining screws so that the two inner rings can centre themselves in relation to each other. Once the retaining screws have been removed, the bearing arrangement is no longer self-retaining. Retaining screws Figure 7 Loosening the retaining screws Schaeffler Technologies MON 100... - Page 18 ■ stage 1: 40% of M ■ stage 2: 70% of M ■ stage 3: 100% of M Figure 9 Locating the inner ring After fitting of the bearings, retighten or remove the retaining screws. MON 100 Schaeffler Technologies...
- Page 19 Tighten the fixing screws in three stages using different tightening torques, see page 18: ■ stage 1: 40% of M ■ stage 2: 70% of M ■ stage 3: 100% of M Figure 11 Locating the outer ring Schaeffler Technologies MON 100...
- Page 20 Tightening torques M Bore Fixing screw Tightening torque axial/radial bearings diameter Stage 40% of M 70% of M 100% of M 1 030 Tightening torque M for fixing screws to DIN EN ISO 4762, grade 10.9. MON 100 Schaeffler Technologies...
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Page 21: Function And Safety Checks Checking The Bearing Frictional Torque
■ eccentric mounting of the bearing with a fit clearance ■ fixing screws that are not tightened as specified ■ retaining screws that were not loosened before the rings were mounted Schaeffler Technologies MON 100... -
Page 22: Checking The Fixing Screws
If the bearing is replaced, new fixing screws must always be used. Failure to follow these instructions can lead to personal injury or damage to property. Figure 12 Checking the tightening torques of the fixing screws MON 100 Schaeffler Technologies... -
Page 23: Lubrication
The bearings YRTC and YRTS can be lubricated via the outer ring and inner ring, bearings ZKLDF via the outer ring only. Bearing series YRTC from bore diameter 580 mm as well as bearing series YRTS and ZKLDF have an additional lubrication connector in the screw mounting face of the outer ring. -
Page 24: Relubrication Of Bearings
Old grease Figure 14 Rotating the bearing ring during relubrication Before initial operation, it must be ensured that all the lubricant ducts to the bearing are filled with lubricant. Figure 15 Filled lubricant ducts MON 100 Schaeffler Technologies... - Page 25 Outer ring Inner ring Figure 16 1030 Grease quantities for initial filling of the lubrication groove Relubrication quantity Axial/radial bearing Relubrication quantity YRT, YRTC, YRTCM, YRTCMA, YRTCMI min. max. YRT50 YRT80-TV YRTC100-XL YRTC120-XL YRTC150-XL YRTC180-XL YRTC200-XL YRTC260-XL YRTC325-XL YRTC395-XL YRTC460-XL...
- Page 26 High precision bearings for combined loads Relubrication quantity Axial/radial bearing Relubrication quantity YRTS, YRTSM, YRTSMA min. max. YRTS200 YRTS260 YRTS325 YRTS395 YRTS460 Relubrication quantity Axial/radial bearing Relubrication quantity ZKLDF min. max. ZKLDF100 ZKLDF120 ZKLDF150 ZKLDF180 ZKLDF200 ZKLDF260 ZKLDF325 ZKLDF395 ZKLDF460 MON 100 Schaeffler Technologies...
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Page 27: Overlubrication
In order to achieve the original frictional torque again, the running-in cycle must be carried out. ZKLDF YRTC, YRTCM, YRTS, YRTSM, YRTCMA, YRTSMA, YRTCMI = limiting speed, see dimension tables t = time... -
Page 28: Further Information Publication Requests
TPI 120, High Precision Bearings for Combined Loads ■ Catalogue HR 1, Rolling Bearings ■ MON 100, High Precision Bearings for Combined Loads ■ MON 18, Axial/radial bearings YRTM with integrated angular measuring system ■ http://medias.schaeffler.de MON 100 Schaeffler Technologies... - Page 30 Printing, including Phone 0180 5003872 excerpts, is only permitted with our approval. From other countries: © Schaeffler Technologies AG & Co. KG Phone +49 9721 91-0 MON 100 / 01 / en-GB / DE / 2021-09...
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