SKF 728CD/HCP4A Angular contact ball bearings,SKF 728 CD/HCP4A Super-precision bearings-BEARINGPOWER Co.,Ltd.
Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 728 CD/HCP4A

728 CD/HCP4A

Dimensions
d 8mm
D 24mm
B 8mm
d1 13.1mm
d2 13.1mm
D1 18.9mm
r1,2min.0.3mm
r3,4min.0.2mm
a 6.2mm
Abutment dimensions
damin.10.4mm
dbmin.10.4mm
Damax.21.6mm
Dbmax.22.2mm
ramax.0.3mm
rbmax.0.2mm
dn 14.3mm
Calculation data
Basic dynamic load ratingC 3.71kN
Basic static load ratingC0 1.37kN
Fatigue load limitPu 0.057kN
Attainable speed for grease lubrication  85000r/min
Attainable speed for oil-air lubrication  130000r/min
Ball diameterDw 4.762mm
Number of ballsz 8 
Reference grease quantityGref 0.228cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class AGA 14N
Static axial stiffness, preload class A  13N/µm
Preload class BGB 28N
Static axial stiffness, preload class B  17N/µm
Preload class CGC 56N
Static axial stiffness, preload class C  23N/µm
Preload class DGD 112N
Static axial stiffness, preload class D  33N/µm
Calculation factors
Calculation factorf 1.02 
Calculation factorf1 1 
Calculation factorf2A 1 
Calculation factorf2B 1.01 
Calculation factorf2C 1.03 
Calculation factorf2D 1.06 
Calculation factorfHC 1.01 
Calculation factorf0 7.9 
Mass
Mass bearing  0.015kg
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Hot number: 1300252 28x42x7 HMSA10 RG 36157 40x55x8 HMSA10 V 40x72x10 HMS5 V 560x620x30 HDSA2 RD 7068 BGM 70x88x8 CRW1 R 71905 ACE/HCP4AL 7306 BECBP 7317 BEGAPH BS2-2318-2RS5K/VT143 BT4-8060 G/HA4VA901 SSAFS 22538 T ZW 60x68

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