M278749/M278710 bearing
Bearing NO. :M278749/M278710
Boundary dimensions(mm)
d :571.5
D :812.8
T :155.575
B :155.575
C :120.65
r 1.2min :6.4
r 3.4min :6.4
Basic load ratings(kN)
Cr :4000
Cor :9300
Limiting speed(rpm)
Grease :370
Oil :470
Application point
a :143.6
Abutment and fillet dimensions(mm)
da max :634
db min :601
Da max :759
Db min :790
ra max :6.4
rb max :6.4
Value
e :0.33
Y :1.8
Y0 :0.99
Weight (kg)
Refer :256
Tapered roller bearings are made of inner races called cones and outer races call cups. They are called tapered roller bearings because the cone assembly is narrower in one end and the races are built with one side narrower as well to match the rollers. This bearing construction is ideal for environments where high speed and heavy loads occur, and a low friction is needed. Tapered roller bearings are widely used in applications like automotive, rail, gearboxes, agriculture, machine tools, construction and more.
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