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 L725300

Cone Part Number

 N/A JL725346

Cup Part Number

 N/A JL725316

Design Unit

 N/A Metric

Cage Material

 N/A Stamped Steel

Related Assembly Number(s)

 N/A JL725346-90BA1

Dimensions

d - Bore

 N/A 125 mm4.9213 in

D - Cup Outer Diameter

 N/A 175 mm6.8898 in

B - Cone Width

 N/A 25.400 mm1.0000 in

C - Cup Width

 N/A 18.288 mm0.7200 in

T - Bearing Width

 N/A 25.400 mm1.0000 in

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1 N/A 3.300 mm0.13 in
r - Cup Backface "To Clear" Radius2 N/A 3.30 mm0.130 in

da - Cone Frontface Backing Diameter

 N/A 133 mm5.24 in

db - Cone Backface Backing Diameter

 N/A 138 mm5.43 in

Da - Cup Frontface Backing Diameter

 N/A 167.90 mm6.65 in

Db - Cup Backface Backing Diameter

 N/A 161.04 mm6.34 in

Ab - Cage-Cone Frontface Clearance

 N/A 2.3 mm0.09 in

Aa - Cage-Cone Backface Clearance

 N/A 2.3 mm0.09 in
a - Effective Center Location3 N/A 9.1 mm0.36 in

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)4 N/A 38900 N8750 lbf
C1 - Dynamic Radial Rating (1 million revolutions)5 N/A 150000 N33700 lbf

C0 - Static Radial Rating

 N/A 246000 N55300 lbf
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 31700 N7130 lbf

Factors

K - Factor7 N/A 1.23
e - ISO Factor8 N/A 0.48
Y - ISO Factor9 N/A 1.26

G1 - Heat Generation Factor (Roller-Raceway)

 N/A 187

G2 - Heat Generation Factor (Rib-Roller End)

 N/A 77.6
Cg - Geometry Factor10 N/A 0.153
  • 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.