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 525

Cone Part Number

 N/A 529

Cup Part Number

 N/A 522A

Design Unit

 N/A Inch

Cage Material

 N/A Stamped Steel

Dimensions

d - Bore

 N/A 2 in50.8 mm

D - Cup Outer Diameter

 N/A 3.9385 in100.038 mm

B - Cone Width

 N/A 1.4200 in36.068 mm

C - Cup Width

 N/A 1.2500 in31.750 mm

T - Bearing Width

 N/A 1.5625 in39.688 mm

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1 N/A 0.03 in0.800 mm
r - Cup Backface "To Clear" Radius2 N/A 0.170 in4.32 mm

da - Cone Frontface Backing Diameter

 N/A 2.36 in60 mm

db - Cone Backface Backing Diameter

 N/A 2.4 in61 mm

Da - Cup Frontface Backing Diameter

 N/A 3.74 in94.00 mm

Db - Cup Backface Backing Diameter

 N/A 3.43 in87.12 mm

Ab - Cage-Cone Frontface Clearance

 N/A 0.1 in2.5 mm

Aa - Cage-Cone Backface Clearance

 N/A 0.09 in2.3 mm
a - Effective Center Location3 N/A -0.5 in-12.7 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)4 N/A 9600 lbf42700 N
C1 - Dynamic Radial Rating (1 million revolutions)5 N/A 37000 lbf165000 N

C0 - Static Radial Rating

 N/A 43000 lbf191000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 4690 lbf20800 N

Factors

K - Factor7 N/A 2.05
e - ISO Factor8 N/A 0.29
Y - ISO Factor9 N/A 2.1
Cg - Geometry Factor10 N/A 0.0894
  • 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.