SKF 71956ACD/HCP4A Angular contact ball bearings,SKF 71956 ACD/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 71956 ACD/HCP4A

71956 ACD/HCP4A

Dimensions
d 280mm
D 380mm
B 46mm
d1 311.8mm
d2 311.8mm
D1 348.2mm
r1,2min.2.1mm
r3,4min.1.1mm
a 100.2mm
Abutment dimensions
damin.291mm
dbmin.291mm
Damax.369mm
Dbmax.374mm
ramax.2mm
rbmax.1mm
dn 319.7mm
Calculation data
Basic dynamic load ratingC 276kN
Basic static load ratingC0 430kN
Fatigue load limitPu 10kN
Attainable speed for grease lubrication  3200r/min
Attainable speed for oil-air lubrication  4800r/min
Ball diameterDw 30.162mm
Number of ballsz 31 
Reference grease quantityGref 159cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class AGA 1700N
Static axial stiffness, preload class A  732N/µm
Preload class BGB 3400N
Static axial stiffness, preload class B  962N/µm
Preload class CGC 6800N
Static axial stiffness, preload class C  1281N/µm
Preload class DGD 13600N
Static axial stiffness, preload class D  1745N/µm
Calculation factors
Calculation factorf 1.27 
Calculation factorf1 0.98 
Calculation factorf2A 1 
Calculation factorf2B 1.07 
Calculation factorf2C 1.12 
Calculation factorf2D 1.17 
Calculation factorfHC 1.04 
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  11.1kg
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Hot number： 32938/DF 416506 51204 V/HR22T2 626-2Z 6413 NR 71913 ACE/HCP4AH1 91396 NU 2215 ECPH PSM 8595100 A51 PSMF 607560 A51 SNL 3044 SAF 23034 KATLC x 6 SAFS 22216 T SAFS 23024 KAT x 4.1/4 SAFS 23034 KAT x 5.7/8

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