Menu
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 LM125700

Cone Part Number

 N/A LM125748

Cup Part Number

 N/A LM125711

Design Unit

 N/A Inch

Cage Material

 N/A Stamped Steel

Dimensions

d - Bore

 N/A 5 in127 mm

D - Cup Outer Diameter

 N/A 6.8750 in174.625 mm

B - Cone Width

 N/A 1.4375 in36.513 mm

C - Cup Width

 N/A 1.2500 in31.750 mm

T - Bearing Width

 N/A 1.4375 in36.513 mm

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1 N/A 0.13 in3.300 mm
r - Cup Backface "To Clear" Radius2 N/A 0.130 in3.30 mm

da - Cone Frontface Backing Diameter

 N/A 5.31 in134.9 mm

db - Cone Backface Backing Diameter

 N/A 5.51 in139.9 mm

Da - Cup Frontface Backing Diameter

 N/A 6.65 in167.90 mm

Db - Cup Backface Backing Diameter

 N/A 6.34 in161.04 mm

Ab - Cage-Cone Frontface Clearance

 N/A 0.05 in1.3 mm

Aa - Cage-Cone Backface Clearance

 N/A 0.06 in1.5 mm
a - Effective Center Location3 N/A -0.17 in-4.3 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)4 N/A 12800 lbf57100 N
C1 - Dynamic Radial Rating (1 million revolutions)5 N/A 49500 lbf220000 N

C0 - Static Radial Rating

 N/A 92900 lbf413000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 6750 lbf30000 N

Factors

K - Factor7 N/A 1.9
e - ISO Factor8 N/A 0.31
Y - ISO Factor9 N/A 1.95

G1 - Heat Generation Factor (Roller-Raceway)

 N/A 314.8

G2 - Heat Generation Factor (Rib-Roller End)

 N/A 110.2
Cg - Geometry Factor10 N/A 0.159
  • 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.
By clicking Submit, you consent to the personal information you provide being used in the manner as described in our Privacy Notice, including access to that information by Timken personnel who may be located outside your home country. In addition, you agree that the CAD drawings are for your personal, one-time use only, and that you will not modify or create any compilation or derivative work using the CAD drawings or distribute or display the CAD drawings on any website or other media.