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Model: NACHI 7004CDB - Angular contact ball bearings (DB) back to back>
Bearing Size
d = 20D = 42
B = 12
a = -2.4
da1(min) = 24
da2(min) = 24
Da1(max) = 38
Da2(max) = 40
ra(max) = 0.6
ra1(max) = 0.3
Mass = 0.079
Basic load rating: 18200
Rated static load: 13200
Limit speed（Grease lubrication）: 21000
Limit speed（Oil lubrication）: 28000
