Angular contact ball bearings, super-precision 71905 CE/P4AL
Bearing number : 71905 CE/P4AL
Size (mm) : 25x42x9
Brand : SKF
Bore Diameter (mm) : 25
Outer Diameter (mm) : 42
Width (mm) : 9
Bearing dimensions and specification in SKF catalogue:
d - 25 mm
D - 42 mm
B - 9 mm
d1 - 30.7 mm
d2 - 29.4 mm
D1 - 36.39 mm
b - 1.5 mm
C1 - 4.6 mm
C2 - 1.4 mm
C3 - 0.9 mm
r1,2 - min. - 0.3 mm
r3,4 - min. - 0.15 mm
a - 9.2 mm
da - min. - 27 mm
db - min. - 27 mm
Da - max. - 40 mm
Db - max. - 41.2 mm
ra - max. - 0.3 mm
rb - max. - 0.15 mm
dn - 31.8 mm
Basic dynamic load rating - C - 5.3 kN
Basic static load rating - C0 - 2.8 kN
Fatigue load limit - Pu - 0.12 kN
Limiting speed for grease lubrication - 49000 r/min
Limiting speed for oil lubrication - 75000 mm/min
Ball - Dw - 4.762 mm
Ball - z - 16
Gref - 0.6 cm3
Calculation factor - f0 - 8.1
Preload class A - GA - 28 N
Preload class B - GB - 85 N
Preload class C - GC - 170 N
Calculation factor - f - 1.06
Calculation factor - f1 - 1
Calculation factor - f2A - 1
Calculation factor - f2B - 1.04
Calculation factor - f2C - 1.08
Calculation factor - fHC - 1
Preload class A - 20 N/micron
Preload class B - 32 N/micron
Preload class C - 44 N/micron
Mass bearing - 0.04 kg
Bearing Seals - S
Seals used in bearings can be a significant contributor due to the friction generated. SKF has addressed this issue with new designs and bearing seals materials which provide reduced friction and longer service life, keeping lubricants in and contaminants out. SKF can provide sealing solutions for several types of bearing applications including:
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