SKF 71920ACB/HCP4AL Angular contact ball bearings,SKF 71920 ACB/HCP4AL Super-precision bearings-BEARINGPOWER Co.,Ltd.
Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71920 ACB/HCP4AL

71920 ACB/HCP4AL

Dimensions
d 100mm
D 140mm
B 20mm
d1 114.92mm
d2 113.16mm
D2 128.7mm
b 2.2mm
C1 10.9mm
C2 4.5mm
C3 2.9mm
r1,2min.1.1mm
r3,4min.0.6mm
a 41.4mm
Abutment dimensions
damin.106mm
dbmin.106mm
Damax.134mm
Dbmax.136.8mm
ramax.1mm
rbmax.0.6mm
dn 116.1mm
Calculation data
Basic dynamic load ratingC 27.6kN
Basic static load ratingC0 33.5kN
Fatigue load limitPu 0.815kN
Attainable speed for grease lubrication  13000r/min
Attainable speed for oil-air lubrication  20000r/min
Ball diameterDw 7.938mm
Number of ballsz 37 
Reference grease quantityGref 9.96cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class AGA 125N
Static axial stiffness, preload class A  178N/µm
Preload class BGB 250N
Static axial stiffness, preload class B  226N/µm
Preload class CGC 750N
Static axial stiffness, preload class C  343N/µm
Calculation factors
Calculation factorf 1.11 
Calculation factorf1 0.99 
Calculation factorf2A 1 
Calculation factorf2B 1.02 
Calculation factorf2C 1.08 
Calculation factorfHC 1.01 
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  0.8kg
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Hot number: 16077 23725 24184 ECAK30/W33 31324 X 32x48x8 CRW1 R 3308 ATN9 45x72x10 HMSA10 V 51096 F 6020 M 91364 BT4B 332666/HA1 K 30x37x16 NKS 32 NU 1017 M/C3VL0241 W 61816-2Z

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