super precision bearings

MACHINING TOLERANCES FOR MATING PARTSInner and Outer Spacer SleevesTolerance Recommendations for Machining Inner Spacer SleevesDimensions in mmNominal sleeve over 0 10 18 30 50 80 120 180 250 315 400 500bore diameter d 2 including 10 18 30 50 80 120 180 250 315 400 500 630Tolerances in µmDeviation of d 2 9 11 13 16 19 22 25 29 32 36 40 440 0 0 0 0 0 0 0 0 0 0 0Cylindricity t 1 2.5 3 4 4 5 6 8 10 12 13 15 16Axial runout t 4 1 1.2 1.5 1.5 2 2.5 3.5 4.5 6 7 8 9Parallelism t 6 1 1.2 1.5 1.5 2 2.5 3.5 4.5 6 7 8 9Radial runout t 7 2.5 3 4 4 5 6 8 10 12 13 15 16Mean surface roughness R a 0.4 0.4 0.4 0.4 0.4 0.8 0.8 0.8 1.6 1.6 1.6 1.6(incl. side faces)Tolerance Recommendations for Machining Outer Spacer SleevesDimensions in mmNominal outside over 10 18 30 50 80 120 180 250 315 400 500 630sleeve diameter D 2 including 18 30 50 80 120 180 250 315 400 500 630 800Tolerances in µmDeviation of D 2 -6 -7 -9 -10 -12 -14 -15 -17 -18 -20 -22 -24-17 -20 -25 -29 -34 -39 -44 -49 -54 -60 -66 -74Cylindricity t 1 3 4 4 5 6 8 10 12 13 15 16 18Axial runout t 4 2 2.5 2.5 3 4 5 7 8 9 10 11 12Parallelism t 6 1.2 1.5 1.5 2 2.5 3.5 4.5 6 7 8 9 10Mean surface roughness R a 0.4 0.4 0.4 0.4 0.8 0.8 0.8 1.6 1.6 1.6 1.6 1.6(incl. side faces)If not explicitly prescribed in the drawing, both spacer sleeves should have the same length. For this purpose, the side faces of the twosleeves should be ground in one chucking.FAG · 166