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Model: NACHI 639/633 - The imperial tapered roller bearings>
Bearing Size
d = 63.5D = 130.175
B = 41.275
T = 41.275
C = 31.75
a = 11.2
da(min) = 81
db(max) = 74
Da(min) = 116
Db(min) = 124
r1(min) = 3.5
r2(min) = 3.3
Mass(Cone) = 639
Mass(Cup) = 633
Basic load rating: 183000
Basic load rating: 183000
Rated static load: 246000
Limit speed（Grease lubrication）: 2800
Limit speed（Oil lubrication） 3800
