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Model: NACHI 7210BDF - Angular contact ball bearings (DF) face to face>
Bearing Size
d = 50D = 90
B = 20
a = 19.4
da1(min) = 57
da2(min) = 55
Da1(max) = 83
Da2(max) = 85
ra(max) = 1
ra1(max) = 0.6
Mass = 0.485
Basic load rating: 63000
Rated static load: 59000
Limit speed（Grease lubrication）: 4500
Limit speed（Oil lubrication）: 6000
