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Model: NACHI 557S/552A - The imperial tapered roller bearings>
Bearing Size
d = 53.975D = 123.825
B = 36.678
T = 38.1
C = 30.162
a = 9.2
da(min) = 71
db(max) = 65
Da(min) = 109
Db(min) = 116
r1(min) = 3.5
r2(min) = 3.3
Mass(Cone) = 557S
Mass(Cup) = 552A
Basic load rating: 149000
Basic load rating: 149000
Rated static load: 197000
Limit speed（Grease lubrication）: 3000
Limit speed（Oil lubrication） 4100
