SKF 71928ACD/P4A Angular contact ball bearings,SKF 71928 ACD/P4A Super-precision bearings-BEARINGPOWER Co.,Ltd.
Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71928 ACD/P4A

71928 ACD/P4A

Dimensions
d 140mm
D 190mm
B 24mm
d1 155.4mm
d2 155.4mm
D1 174.6mm
r1,2min.1.5mm
r3,4min.0.6mm
a 50.6mm
Abutment dimensions
damin.147mm
dbmin.147mm
Damax.183mm
Dbmax.186mm
ramax.1.5mm
rbmax.0.6mm
dn 159.5mm
Calculation data
Basic dynamic load ratingC 90.4kN
Basic static load ratingC0 110kN
Fatigue load limitPu 3.65kN
Attainable speed for grease lubrication  6000r/min
Attainable speed for oil-air lubrication  9000r/min
Ball diameterDw 15.875mm
Number of ballsz 29 
Reference grease quantityGref 21.6cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class AGA 560N
Static axial stiffness, preload class A  348N/µm
Preload class BGB 1120N
Static axial stiffness, preload class B  457N/µm
Preload class CGC 2240N
Static axial stiffness, preload class C  614N/µm
Preload class DGD 4480N
Static axial stiffness, preload class D  841N/µm
Calculation factors
Calculation factorf 1.29 
Calculation factorf1 0.98 
Calculation factorf2A 1 
Calculation factorf2B 1.04 
Calculation factorf2C 1.08 
Calculation factorf2D 1.14 
Calculation factorfHC 1 
Calculation factore 0.68 
Calculation factor (single, tandem)Y2 0.87 
Calculation factor (single, tandem)Y0 0.38 
Calculation factor (single, tandem)X2 0.41 
Calculation factor (back-to-back, face-to-face)Y1 0.92 
Calculation factor (back-to-back, face-to-face)Y2 1.41 
Calculation factor (back-to-back, face-to-face)Y0 0.76 
Calculation factor (back-to-back, face-to-face)X2 0.67 
Mass
Mass bearing  1.65kg
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