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Model: NACHI 7228B - Single row angular contact ball bearings>
Bearing Size
d = 140D = 250
B = 42
a = 60.8
da1(min) = 154
da2(min) = 147
Da1(max) = 236
Da2(max) = 243
ra(max) = 2.5
ra1(max) = 1
Mass = 8.78
Basic load rating: 197000
Rated static load: 214000
Limit speed（Grease lubrication）: 2000
Limit speed（Oil lubrication）: 2600
