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 M276400

Cone Part Number

 N/A M276449

Cup Part Number

 N/A M276410

Design Unit

 N/A Inch

Cage Material

 N/A Pin-Type

Related Assembly Number(s)

 N/A M276449-90051

Dimensions

d - Bore

 N/A 21.1250 in536.575 mm

D - Cup Outer Diameter

 N/A 29.9950 in761.873 mm

B - Cone Width

 N/A 5.7500 in146.050 mm

C - Cup Width

 N/A 4.5000 in114.300 mm

T - Bearing Width

 N/A 5.7500 in146.050 mm

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1 N/A 0.25 in6.4 mm
r - Cup Backface "To Clear" Radius2 N/A 0.250 in6.35 mm

da - Cone Frontface Backing Diameter

 N/A 22.44 in570 mm

db - Cone Backface Backing Diameter

 N/A 22.68 in576 mm

Da - Cup Frontface Backing Diameter

 N/A 28.89 in725.70 mm

Db - Cup Backface Backing Diameter

 N/A 27.99 in710.95 mm

Ab - Cage-Cone Frontface Clearance

 N/A 0.32 in8.1 mm

Aa - Cage-Cone Backface Clearance

 N/A 0.42 in10.7 mm
a - Effective Center Location3 N/A -0.38 in-9.7 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)4 N/A 234000 lbf1040000 N
C1 - Dynamic Radial Rating (1 million revolutions)5 N/A 902000 lbf4010000 N

C0 - Static Radial Rating

 N/A 2080000 lbf9250000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 133000 lbf592000 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 10600

G2 - Heat Generation Factor (Rib-Roller End)

 N/A 614
Cg - Geometry Factor10 N/A 0.284
  • 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.