COMPANY HEADER
CAD (0) ▾
  • Cart is empty
  1. Request CAD files
Terms
Request Information Add to CAD Cart
This is the most basic and most widely used type of tapered roller bearing. It consists of two main separable parts: the cone (inner ring) assembly and the cup (outer ring). It is typically mounted in opposing pairs on a shaft.
Unit of Measure

Specifications

Series

 N/A 30310

Cone Part Number

 N/A X30310

Design Units

 N/A METRIC

Cage Type

 N/A Stamped Steel
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)1 N/A 247000 N55600 lbf
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)2 N/A 64100 N14400 lbf

Full Timken Part Number

 N/A 30310

Dimensions

d - Cone Bore

 N/A 50 mm1.9685 in

B - Cone Width

 N/A 27.000 mm1.0630 in

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius3 N/A 2.540 mm0.1 in

da - Cone Frontface Backing Diameter

 N/A 58 mm2.28 in

db - Cone Backface Backing Diameter

 N/A 62 mm2.44 in

Ab - Cage-Cone Frontface Clearance

 N/A 3.8 mm0.15 in

Aa - Cage-Cone Backface Clearance

 N/A 1.3 mm0.05 in
a - Effective Center Location4 N/A -6.1 mm-0.24 in

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)5 N/A 36800 N8270 lbf
C1 - Dynamic Radial Rating (1 million revolutions)6 N/A 142000 N31900 lbf

C0 - Static Radial Rating

 N/A 150000 N33800 lbf
Ca90 - Dynamic Thrust Rating (90 million revolutions)7 N/A 21700 N4890 lbf

Factors

K - Factor8 N/A 1.69

G1 - Heat Generation Factor (Roller-Raceway)

 N/A 48.7

G2 - Heat Generation Factor (Rib-Roller End)

 N/A 16.7
Cg - Geometry Factor9 N/A 0.0892
  • 1 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
  • 2 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values for a single-row, C90(2) is the two-row radial value.
  • 3 These maximum fillet radii will be cleared by the bearing corners.
  • 4 Negative value indicates effective center inside cone backface.
  • 5 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values.
  • 6 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
  • 7 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values for a single-row, C90(2) is the two-row radial value.
  • 8 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 9 Geometry constant for Lubrication Life Adjustment Factor a3l.