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Model: NACHI 7220DB - Angular contact ball bearings (DB) back to back>
Bearing Size
d = 100D = 180
B = 34
a = 23.4
da1(min) = 112
da2(min) = 107
Da1(max) = 168
Da2(max) = 173
ra(max) = 2
ra1(max) = 1
Mass = 3.32
Basic load rating: 234000
Rated static load: 251000
Limit speed（Grease lubrication）: 2400
Limit speed（Oil lubrication）: 3400
