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Model: NACHI 7318DB - Angular contact ball bearings (DB) back to back>
Bearing Size
d = 90D = 190
B = 43
a = 18.9
da1(min) = 104
da2(min) = 97
Da1(max) = 176
Da2(max) = 183
ra(max) = 2.5
ra1(max) = 1
Mass = 5.76
Basic load rating: 277000
Rated static load: 295000
Limit speed（Grease lubrication）: 2600
Limit speed（Oil lubrication）: 3400
