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Model: NACHI 7004DF - Angular contact ball bearings (DF) face to face>
Bearing Size
d = 20D = 42
B = 12
a = 2.9
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: 16700
Rated static load: 12100
Limit speed（Grease lubrication）: 12000
Limit speed（Oil lubrication）: 16000
