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Model: NACHI 7228CDF - Angular contact ball bearings (DF) face to face>
Bearing Size
d = 140D = 250
B = 42
a = 1.3
da1(min) = 154
da2(min) = 154
Da1(max) = 236
Da2(max) = 243
ra(max) = 2.5
ra1(max) = 1
Mass = 8.78
Basic load rating: 360000
Rated static load: 470000
Limit speed（Grease lubrication）: 3300
Limit speed（Oil lubrication）: 4500
