SKF 71908ACE/P4AL Angular contact ball bearings,SKF 71908 ACE/P4AL Super-precision bearings-BEARINGPOWER Co.,Ltd.
Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71908 ACE/P4AL

71908 ACE/P4AL

Dimensions
d 40mm
D 62mm
B 12mm
d1 46.5mm
d2 44.8mm
D1 54.15mm
b 2mm
C1 5.9mm
C2 1.8mm
C3 1.8mm
r1,2min.0.6mm
r3,4min.0.3mm
a 18.6mm
Abutment dimensions
damin.43.2mm
dbmin.42mm
Damax.58.8mm
Dbmax.60mm
ramax.0.6mm
rbmax.0.3mm
dn 48mm
Calculation data
Basic dynamic load ratingC 9.23kN
Basic static load ratingC0 5.85kN
Fatigue load limitPu 0.245kN
Attainable speed for grease lubrication  28000r/min
Attainable speed for oil-air lubrication  44000r/min
Ball diameterDw 6.35mm
Number of ballsz 19 
Reference grease quantityGref 1.4cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class AGA 84N
Static axial stiffness, preload class A  78N/µm
Preload class BGB 250N
Static axial stiffness, preload class B  117N/µm
Preload class CGC 505N
Static axial stiffness, preload class C  153N/µm
Calculation factors
Calculation factorf 1.05 
Calculation factorf1 0.99 
Calculation factorf2A 1 
Calculation factorf2B 1.04 
Calculation factorf2C 1.07 
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  0.1kg
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Hot number: 2208 EKTN9 30211/DF 401305 55x70x8 HMS5 RG 7332 BCBM 7308 BEGBM NA 4864 NUP 205 ECML PF 80 RN-3.5x13.8 BF/G2 S71926 CD/P4A SAF 1610 T SAF 22628 T W 63800-2Z YEL 205-015-2F

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