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 HM252300

Cone Part Number

 N/A HM252348

Cup Part Number

 N/A HM252315

Design Unit

 N/A Inch

Cage Material

 N/A Stamped Steel

Dimensions

d - Bore

 N/A 10.2500 in260.350 mm

D - Cup Outer Diameter

 N/A 16.9970 in431.724 mm

B - Cone Width

 N/A 3.1406 in79.771 mm

C - Cup Width

 N/A 2.3750 in60.325 mm

T - Bearing Width

 N/A 3.2500 in82.550 mm

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1 N/A 0.270 in6.900 mm
r - Cup Backface "To Clear" Radius2 N/A 0.140 in3.56 mm

da - Cone Frontface Backing Diameter

 N/A 11.22 in285 mm

db - Cone Backface Backing Diameter

 N/A 11.5 in292 mm

Da - Cup Frontface Backing Diameter

 N/A 15.73 in398.30 mm

Db - Cup Backface Backing Diameter

 N/A 15.63 in397.00 mm

Ab - Cage-Cone Frontface Clearance

 N/A 0.24 in6.1 mm

Aa - Cage-Cone Backface Clearance

 N/A 0.48 in12.2 mm
a - Effective Center Location3 N/A -0.37 in-9.4 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)4 N/A 87400 lbf389000 N
C1 - Dynamic Radial Rating (1 million revolutions)5 N/A 337000 lbf1500000 N

C0 - Static Radial Rating

 N/A 455000 lbf2020000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 49700 lbf221000 N

Factors

K - Factor7 N/A 1.76
e - ISO Factor8 N/A 0.33
Y - ISO Factor9 N/A 1.8

G1 - Heat Generation Factor (Roller-Raceway)

 N/A 1504.3

G2 - Heat Generation Factor (Rib-Roller End)

 N/A 147.8
Cg - Geometry Factor10 N/A 0.148
  • 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.