super precision bearings

Shafts and Housings for Spindle BearingsTolerance Recommendations for Machining the Shafts for Spindle BearingsDimensions in mmNominal shaft over 0 10 18 30 50 80 120 180 250 315 400 500diameter d including 10 18 30 50 80 120 180 250 315 400 500 630Tolerances in µmDeviation of d 2 2.5 3 3.5 4 5 6 7 8 9 10 11-2 -2.5 -3 -3.5 -4 -5 -6 -7 -8 -9 -10 -11Cylindricity t 1 0.6 0.8 1 1 1.2 1.5 2 3 4 5 6 7Flatness t 3 0.6 0.8 1 1 1.2 1.5 2 3 4 5 6 7Axial runout t 4 1 1.2 1.5 1.5 2 2.5 3.5 4.5 6 7 8 9Coaxiality t 5 2.5 3 4 4 5 6 8 10 12 13 15 16Mean surface roughness R a 0.2 0.2 0.2 0.2 0.4 0.4 0.4 0.4 0.8 0.8 0.8 0.8Tolerance Recommendations for Machining the Housings for Spindle BearingsDimensions in mmNominal housing over 10 18 30 50 80 120 180 250 315 400 500 630diameter D including 18 30 50 80 120 180 250 315 400 500 630 800Tolerances in µmDeviation of D Locating +3 +4 +4 +5 +6 +8 +10 +12 +13 +15 +16 +17bearing -2 -2 -3 -3 -4 -4 -4 -4 -5 -5 -6 -7Floating +7 +8 +10 +11 +14 +17 +21 +24 +27 +30 +33 +36bearing +2 +2 +3 +3 +4 +5 +7 +8 +9 +10 +11 +12Cylindricity t 1 1.2 1.5 1.5 2 2.5 3.5 4.5 6 7 8 9 10Flatness t 3 1.2 1.5 1.5 2 2.5 3.5 4.5 6 7 8 9 10Axial runout t 4 2 2.5 2.5 3 4 5 7 8 9 10 11 12Coaxiality t 5 3 4 4 5 6 8 10 12 13 15 16 18Mean 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 1.6EngineeringFAG · 165