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 545000

Cone Part Number

 N/A 545112

Cup Part Number

 N/A 545141

Design Unit

 N/A Inch

Cage Material

 N/A Stamped Steel

Related Assembly Number(s)

 N/A 545112-903B1

Dimensions

d - Bore

 N/A 11.2500 in285.750 mm

D - Cup Outer Diameter

 N/A 14.125 in358.775 mm

B - Cone Width

 N/A 1.2500 in31.750 mm

C - Cup Width

 N/A 0.8750 in22.225 mm

T - Bearing Width

 N/A 1.3125 in33.338 mm

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1 N/A 0.14 in3.600 mm
r - Cup Backface "To Clear" Radius2 N/A 0.130 in3.30 mm

da - Cone Frontface Backing Diameter

 N/A 11.73 in298 mm

db - Cone Backface Backing Diameter

 N/A 11.89 in302 mm

Da - Cup Frontface Backing Diameter

 N/A 13.62 in345.90 mm

Db - Cup Backface Backing Diameter

 N/A 13.39 in340.11 mm

Ab - Cage-Cone Frontface Clearance

 N/A 0.16 in4.1 mm

Aa - Cage-Cone Backface Clearance

 N/A 0.2 in5.1 mm
a - Effective Center Location3 N/A 1.29 in32.8 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)4 N/A 15000 lbf66800 N
C1 - Dynamic Radial Rating (1 million revolutions)5 N/A 58000 lbf258000 N

C0 - Static Radial Rating

 N/A 134000 lbf596000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 12600 lbf56300 N

Factors

K - Factor7 N/A 1.19
e - ISO Factor8 N/A 0.49
Y - ISO Factor9 N/A 1.22

G1 - Heat Generation Factor (Roller-Raceway)

 N/A 1020

G2 - Heat Generation Factor (Rib-Roller End)

 N/A 477
Cg - Geometry Factor10 N/A 0.145
  • 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.