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Model: NACHI 7230DB - Angular contact ball bearings (DB) back to back>
Bearing Size
d = 150D = 270
B = 45
a = 38.1
da1(min) = 164
da2(min) = 157
Da1(max) = 256
Da2(max) = 263
ra(max) = 2.5
ra1(max) = 1
Mass = 11
Basic load rating: 405000
Rated static load: 560000
Limit speed（Grease lubrication）: 1600
Limit speed（Oil lubrication）: 2200
