Montage of Timken Bearing Products
Batch CAD Cart (0) ▾
  • Cart is empty
  1. Click Here for Batch Download
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 LM117900

Cone Part Number

 N/A LM117949

Cup Part Number

 N/A LM117910

Design Unit

 N/A Inch

Cage Material

 N/A Stamped Steel

Dimensions

d - Bore

 N/A 3 1/2 in88.900 mm

D - Cup Outer Diameter

 N/A 5.1250 in130.175 mm

B - Cone Width

 N/A 1.1250 in28.575 mm

C - Cup Width

 N/A 1.0000 in25.400 mm

T - Bearing Width

 N/A 1.1250 in28.575 mm

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1 N/A 0.09 in2.290 mm
r - Cup Backface "To Clear" Radius2 N/A 0.090 in2.29 mm

da - Cone Frontface Backing Diameter

 N/A 3.78 in96 mm

db - Cone Backface Backing Diameter

 N/A 3.9 in99 mm

Da - Cup Frontface Backing Diameter

 N/A 4.89 in124.00 mm

Db - Cup Backface Backing Diameter

 N/A 4.72 in119.89 mm

Ab - Cage-Cone Frontface Clearance

 N/A 0.07 in1.8 mm

Aa - Cage-Cone Backface Clearance

 N/A 0.04 in1 mm
a - Effective Center Location3 N/A -0.22 in-5.6 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)4 N/A 8060 lbf35800 N
C1 - Dynamic Radial Rating (1 million revolutions)5 N/A 31100 lbf138000 N

C0 - Static Radial Rating

 N/A 49500 lbf220000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 3710 lbf16500 N

Factors

K - Factor7 N/A 2.17
e - ISO Factor8 N/A 0.27
Y - ISO Factor9 N/A 2.23

G1 - Heat Generation Factor (Roller-Raceway)

 N/A 135.7

G2 - Heat Generation Factor (Rib-Roller End)

 N/A 61.9
Cg - Geometry Factor10 N/A 0.116
  • 1 These maximum fillet radii will be cleared by the bearing corners.
  • 2 These maximum fillet radii will be cleared by the bearing corners.
  • 3 Negative value indicates effective center inside cone backface.
  • 4 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values.
  • 5 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
  • 6 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.
  • 7 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 8 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 9 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 10 Geometry constant for Lubrication Life Adjustment Factor a3l.