SKF 71956ACD/P4A Angular contact ball bearings,SKF 71956 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 71956 ACD/P4A

71956 ACD/P4A

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  2600r/min
Attainable speed for oil-air lubrication  4000r/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  659N/µm
Preload class BGB 3400N
Static axial stiffness, preload class B  867N/µm
Preload class CGC 6800N
Static axial stiffness, preload class C  1154N/µm
Preload class DGD 13600N
Static axial stiffness, preload class D  1572N/µm
Calculation factors
Calculation factorf 1.27 
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  12.9kg
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Hot number: 1850 VL V BD-23148 CCK/W33-OH 3148 H BD-23252 CCK/W33-OH 2352 H 331625 61940 7028 CD/HCP4AL D/W R3 R-2RS1 FNL 506 A FSAF 1517 x 2.13/16 TLC FYK 20 TR IR 6X10X10 IS1 NJ 2308 ECJ NU 1016 ECM PPMF 151712 SNP 3052x9.1/2

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