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31300 Series

31309J2/QCL7C bearing

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  • 31300 Series
  • 31300 Series
Designation :31309J2/QCL7C
Principal dimensions（mm）
d1 :45
D :100
B :27,25
Basic load ratings（KN）
dyc(Cr) :106
stc(Cor) :102
Pu :12,5
Speed ratings（rpm）
Speed Ratings :5000
Limiting Speed :6700
Weight(Kg) :0,95
ISO335 
Dimensions (ABMA) :7FB
Dimensions （mm）
d :45
d1～ :74,7
B :25
C :18
r1,2(min) :2
r3,4(min) :1,5
a :31
Abutment and fillet dimensions （mm）
da(max) :57
db(min) :53
Da(min) :79
Da(max) :91
Db(min) :95
Ca(min) :4
Cb(min) :9
ra(max) :2
rb(max) :1,5
Value
e :0,83
Y :0,72
Yo :0,4

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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