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High precision bearings for combined loads

High precision bearings for combined loads
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High precision bearings for combined loads - 1

Axial/radial bearingsAxial angular contact ball bearingsAxial/radial bearings with integral angular measuring system >

High precision bearings for combined loads - 2

With its forward-looking bearing arrangement solutions for feed spindles, main spindles, rotary tables and linear guidance units, SchaefflerKG has been at the forefront of the world market for decades. The bearing components alone, however, are often no longer the decisive factor for these machine subsystems.Our customers have of course benefited directly from significant performance improvements and unique selling propositions thanks to our ready-to-fitӔ products; these compact, ready-to-fit bearings are used in accordance with the simple principle: unpack, screw mount, use. In order to...

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High precision bearings for combined loads - 4

YRTRTCYRT > Speed 107 584 ZKLDF > 107 585 YRTM MEKO/U > 107 586

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High precision bearings for combined loads - 7

YRT > 107 305a RTC > 107 520b For higher speeds YRT > Speed 107 485c ZKLDF > 107 306a 6Schaeffler Group Industrial >

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High precision bearings for combined loads - 8

Axial/radial bearingsYRT, RTC and YRT > Speed and axial angular contact ball bearingsZKLDF are ready-to-fit high precision bearings for high precision applications with combined loads. They can support radial loads, axial loads from both sides and tilting moments without clearance and are particularly suitable for bearing arrangements with high requirements for running accuracy, such as rotary tables, face plates, milling heads and reversible clamps.Due to the fixing holes in the bearing rings, the units are very easy to fit.The bearings are radially and axially preloaded after fitting. The...

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High precision bearings for combined loads - 9

Suffix Description Design H > 1 ... Reduced tolerance on mounting dimension H > 1 (postscript: H Special design > 1) 1 with tolerance ...)Restricted tolerance value according to table, page22 H > 2 ... Reduced tolerance on mounting dimension H > 2 (postscript: H Special design > 1) 2 with tolerance ...)Restricted tolerance value according to table, page22 Axial and radial runout tolerances reduced by 50% (additional text: axial/radial runout 50%) Special design > 1) 1) Available by agreement. >

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High precision bearings for combined loads - 10

The load carrying capacity and life must be checked for the radial and axial bearing component.Please contact us in relation to checking of the basic rating life. The speed, load and operating duration must be given. > The static load safety factorS > indicates the security against impermissible permanent deformations in the bearing.It is determined as follows: > rraa00000 S Static load safety factorC 0r , C 0a NBasic static load rating according to dimension tablesF 0r , F 0a NMaximum static load on the radial or axial bearing. Caution! In machine tools and similar areas of application, S...

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G G =limiting speed according to dimension tablest=time > Desig-nation Classi-

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High precision bearings for combined loads - 17

YRT, RTC, YRT > Speed and ZKLDF have the same mounting dimensions. Caution! Geometrical defects in the screw mounting surfaces and fits will influence the running accuracy, preload and running characteristics of the bearing arrangement. The accuracy of the adjacent surfaces must therefore be matched to the overall accuracy requirement of the subassembly.The adjacent construction should be produced in accordance with Figure 14 and the tolerances must be in accordance with the tables starting on page18. Any deviations will influence the bearing frictional torque, running accuracy and running...

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High precision bearings for combined loads - 18

For easier matching of the adjacent construction to the actual bearing dimensions, each bearing of seriesRTC and YRT > Speed is supplied with a measurement record (this is supplied by agreement for other series). Recommended fits for shafts The shaft should be produced to tolerance zoneh5 and for seriesYRT > Speed according to the table, page19.If there are special requirements, the fit clearance must be further restricted within the tolerance zoneh5: ■ Requirements for running accuracy: For maximum running accuracy and a rotating bearing inner ring, the fit clearance should be as close as...

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High precision bearings for combined loads - 20

Axial/radial bearing Shaft diameterdmm Housing boreDmm > Speed YRT > Speed 200 > Axial/radial bearing Roundness Parallelism Perpendicularity t > 2 t > 6 t > 8 Speed m m m YRT > Speed 200 6 5 5 YRT > Speed 260 to YRT > Speed 460 8 5 7 > Axial/radial bearing Roundness Perpendicularity t > 2 t > 8 Speed m m YRT > Speed 200 to YRT > Speed 460 6 8 > Bore diameter Max. corner radius d R > max Speed

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High precision bearings for combined loads - 22

Retaining screws secure the bearing components during transport. For easier centring of the bearing, the screws should be loosened before fitting and either secured again or removed after fitting.Tighten the fixing screws in crosswise sequence using a torque wrench in three stages to the specified tightening torqueM > A , rotating the bearingZKLDF, Figure 17 : ■ Stage1 40% of M > A ■ Stage2 70% of M > A ■ Stage3 100% of M > A .Observe the correct grade of the fixing screws. Caution! Mounting forces must only be applied to the bearing ring to be fitted, never through the rolling...

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High precision bearings for combined loads - 23

Dimensional tolerances Mounting dimensions Axial and radial runout > 1) Bore Outside diameter Re-

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High precision bearings for combined loads - 24

Dimensional tolerances Mounting dimensions Axial and radial runout Axial run-out > 1) 1) Bore Outside diameter Bearing height Stan- Dimensional tolerances Mounting dimensions Axial and radial runout > 1) Bore Outside diameter > Speed d > ds D > Ds H > 1 H1s H > 2 mm mm mm mm mm mm mm m 200 > 0,015 300 > 0,018 30 > 0,04 0,06 15 4 260 > 0,018 385 > 0,02 36,5 > 0,05 0,07 18,5 6 325 > 0,023 450 > 0,023 40 > 0,06 0,07 20 6 395 > 0,023 525 > 0,028 42,5 > 0,06 0,07 22,5 6 460 > 0,023 600 > 0,028 46 > 0,07 0,08 24 6 > 1) For rotating inner and outer ring, measured on fitted bearing, with ideal...

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Dimension table Dimensions in mm Desig-nation Mass Dimensions Fixing holes m d D H H > 1 H > 2 C D > 1 J J > 1 Inner ring Outer ring d > 1 d > 2 a Quan-

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Pitch t > 1) Threaded extraction holes Screw tightening torque Basic load ratings Lim-itingspeed Bearing frictional torque Axial rigid-ity Radial rigid-ity Tilting rigidity > 3) 6) 3) 3) Quantity Xt G Quan-

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