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Model: NACHI 7311DF - Angular contact ball bearings (DF) face to face>
Bearing Size
d = 55D = 120
B = 29
a = 10.8
da1(min) = 65
da2(min) = 61
Da1(max) = 110
Da2(max) = 114
ra(max) = 2
ra1(max) = 1
Mass = 1.45
Basic load rating: 139000
Rated static load: 123000
Limit speed（Grease lubrication）: 4000
Limit speed（Oil lubrication）: 5500
