SKF 71938CD/P4A Angular contact ball bearings,SKF 71938 CD/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 71938 CD/P4A

71938 CD/P4A

Dimensions
d 190mm
D 260mm
B 33mm
d1 211.6mm
d2 211.6mm
D1 238.4mm
r1,2min.2mm
r3,4min.1mm
a 46.8mm
Abutment dimensions
damin.199mm
dbmin.199mm
Damax.251mm
Dbmax.255mm
ramax.2mm
rbmax.1mm
dn 217.4mm
Calculation data
Basic dynamic load ratingC 172kN
Basic static load ratingC0 220kN
Fatigue load limitPu 6.2kN
Attainable speed for grease lubrication  5000r/min
Attainable speed for oil-air lubrication  7500r/min
Ball diameterDw 22.225mm
Number of ballsz 28 
Reference grease quantityGref 57cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class AGA 640N
Static axial stiffness, preload class A  189N/µm
Preload class BGB 1280N
Static axial stiffness, preload class B  260N/µm
Preload class CGC 2560N
Static axial stiffness, preload class C  367N/µm
Preload class DGD 5120N
Static axial stiffness, preload class D  538N/µm
Calculation factors
Calculation factorf 1.27 
Calculation factorf1 1 
Calculation factorf2A 1 
Calculation factorf2B 1.04 
Calculation factorf2C 1.09 
Calculation factorf2D 1.15 
Calculation factorfHC 1 
Calculation factorf0 16.4 
Mass
Mass bearing  4.35kg
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Hot number： 240/710 ECA/W33 305-2ZNR 53208 + U 208 6026-2RS1 650 VRME R 7216 BECBJ FSAF 1314 TLC IR 260x285x60 LS 100135 PRM 252815 SAF 22522 x 3.11/16 TLC SNL 3188 TURT SNW 6x1 SSAFS 22528 x 4.7/8 T SY 30 WF

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