super precision bearings

MACHINING TOLERANCES FOR MATING PARTSTapered Shafts for Cylindrical Roller Bearings and Taper AnglesTolerance Recommendations for Machining the Tapered Shafts for Cylindrical Roller BearingsDimensions in mmNominal shaft over 18 30 40 50 65 80 100 120 140 160 180 200 225 250 280 315 355 400 450 500diameter d including 30 40 50 65 80 100 120 140 160 180 200 225 250 280 315 355 400 450 500 560Tolerance Class SP Tolerances in µmDeviation of small-end +73 +91 +108 +135 +159 +193 +225 +266 +298 +328 +370 +405 +445 +498 +548 +615 +685 +767 +847 +928taper diameter +64 +80 +97 +122 +146 +178 +210 +248 +280 +310 +350 +385 +425 +475 +525 +590 +660 +740 +820 +900Roundness t 2 1 1 1 1.2 1.2 1.5 1.5 2 2 2 3 3 3 4 4 5 5 6 6 7Flatness t 3 1 1 1 1.2 1.2 1.5 1.5 2 2 2 3 3 3 4 4 5 5 6 6 7Axial runout t 4 1.5 1.5 1.5 2 2 2.5 2.5 3.5 3.5 3.5 4.5 4.5 4.5 6 6 7 7 8 8 9Mean surface roughn. R a 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.4 0.4 0.4 0.4 0.4 0.4 0.4Tolerance Class UP Tolerances in µmDeviation of large-end +73 +91 +108 +135 +159 +193 +225 +266 +298 +328 +370 +405 +445 +498 +548 +615 +685 +767 +847 +928taper diameter +64 +80 +97 +122 +146 +178 +210 +248 +280 +310 +350 +385 +425 +475 +525 +590 +660 +740 +820 +900Roundness t 2 0.6 0.6 0.6 0.8 0.8 1 1 1.2 1.2 1.2 2 2 2 2.5 2.5 3 3 4 4 5Flatness t 3 0.6 0.6 0.6 0.8 0.8 1 1 1.2 1.2 1.2 2 2 2 2.5 2.5 3 3 4 4 5Axial runout t 4 1 1 1 1.2 1.2 1.5 1.5 2 2 2 3 3 3 4 4 5 5 6 6 7Mean surface roughn. R a 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.4 0.4 0.4 0.4 0.4 0.4 0.4Deviation of Taper AngleDimensions in mmNominal taper >16...25 >25...40 >40...63 >63...100 >100...160 >160...250length LTolerance Class SP Tolerances in µmTaper angle tolerance AT D +2 +3.2 +2.5 +4 +3.2 +5 +4 +6.3 +5 +8 +6.3 +100 0 0 0 0 0 0 0 0 0 0 0Tolerance Class UP Tolerances in µmTaper angle tolerance AT D +1.3 +2 +1.6 +2.5 +2 +3.2 +2.5 +4 +3.2 +5 +4 +6,30 0 0 0 0 0 0 0 0 0 0 0The taper angle tolerance AT D is measured vertically to the axis and is defined as a diameter difference.When using FAG taper measuring instruments MGK 132, the listed AT D values must be cut by half (inclination angle tolerance).For taper lengths the nominal dimensions of which lie in between the values listed in the tables, the taper angle tolerance AT D is determinedthrough interpolation.Example: Taper length 50 mm, bearing of tolerance class SP.AT D = AT DU + · (L - L u ) = 3.2 + · (50 - 40) = 3.98 µm∆AT D 5 - 3.2∆L 63 - 40The taper angle tolerance AT D = + 4 µmFAG · 168