Angular contact ball bearings, super-precision 7004 ACD/P4A
Bearing number : 7004 ACD/P4A
Size (mm) : 20x42x12
Brand : SKF
Bore Diameter (mm) : 20
Outer Diameter (mm) : 42
Width (mm) : 12
Bearing dimensions and specification in SKF catalogue:
d - 20 mm
D - 42 mm
B - 12 mm
d1 - 27.1 mm
d2 - 27.1 mm
D1 - 34.8 mm
r1,2 - min. - 0.6 mm
r3,4 - min. - 0.3 mm
a - 13.3 mm
da - min. - 23.2 mm
db - min. - 23.2 mm
Da - max. - 38.8 mm
Db - max. - 40 mm
ra - max. - 0.6 mm
rb - max. - 0.3 mm
dn - 28.4 mm
Basic dynamic load rating - C - 8.3 kN
Basic static load rating - C0 - 4.2 kN
Fatigue load limit - Pu - 0.173 kN
Limiting speed for grease lubrication - 38000 r/min
Limiting speed for oil lubrication - 60000 mm/min
Ball - Dw - 6.35 mm
Ball - z - 12
Gref - 0.9 cm3
Calculation factor - e - 0.68
Calculation factor - Y2 - 0.87
Calculation factor - Y0 - 0.38
Calculation factor - X2 - 0.41
Calculation factor - Y1 - 0.92
Calculation factor - Y2 - 1.41
Calculation factor - Y0 - 0.76
Calculation factor - X2 - 0.67
Preload class A - GA - 50 N
Preload class B - GB - 100 N
Preload class C - GC - 200 N
Preload class D - GD - 400 N
Calculation factor - f - 1.03
Calculation factor - f1 - 0.99
Calculation factor - f2A - 1
Calculation factor - f2B - 1.02
Calculation factor - f2C - 1.05
Calculation factor - f2D - 1.08
Calculation factor - fHC - 1
Preload class A - 54 N/micron
Preload class B - 69 N/micron
Preload class C - 90 N/micron
Preload class D - 120 N/micron
Mass bearing - 0.068 kg
Angular Contact Bearings - Motion Industri
Internal clearance is how much the bearing's rolling elements move within the raceway before the bearing is mounted to a shaft. A greater internal clearance means there is more space, or looseness, within the bearing. Internal clearance is most commonly expressed with the letter C followed by a number, with C0 being standard clearance.
SKF 7004 CD/P4A Angular contact ball bearings Custom .
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Bearing ID AFBMA - Nid
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The contact angle a is defined as the angle between the line joining the points of contact of the ball and the raceways in the radial plane, along which the load is transmitted from one raceway to another, and a line perpendicular to the bearing axis. SKF angular contact ball bearings are produced in a wide variety of designs and sizes. Less
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