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 920000

Cone Part Number

 N/A EE921124

Cup Part Number

 N/A 921875

Design Unit

 N/A Inch

Cage Material

 N/A Pin-Type

Dimensions

d - Bore

 N/A 11.2500 in285.750 mm

D - Cup Outer Diameter

 N/A 18.7500 in476.250 mm

B - Cone Width

 N/A 3.1720 in80.569 mm

C - Cup Width

 N/A 2.2500 in57.150 mm

T - Bearing Width

 N/A 3.2193 in81.770 mm

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1 N/A 0.380 in9.700 mm
r - Cup Backface "To Clear" Radius2 N/A 0.130 in3.30 mm

da - Cone Frontface Backing Diameter

 N/A 12.17 in309 mm

db - Cone Backface Backing Diameter

 N/A 12.8 in325 mm

Da - Cup Frontface Backing Diameter

 N/A 17.44 in442.98 mm

Db - Cup Backface Backing Diameter

 N/A 17.40 in441.96 mm

Ab - Cage-Cone Frontface Clearance

 N/A 0.29 in7.4 mm

Aa - Cage-Cone Backface Clearance

 N/A 0.58 in14.7 mm
a - Effective Center Location3 N/A -0.53 in-13.5 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)4 N/A 88000 lbf391000 N
C1 - Dynamic Radial Rating (1 million revolutions)5 N/A 339000 lbf1510000 N

C0 - Static Radial Rating

 N/A 447000 lbf1990000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 44000 lbf196000 N

Factors

K - Factor7 N/A 2
e - ISO Factor8 N/A 0.29
Y - ISO Factor9 N/A 2.05

G1 - Heat Generation Factor (Roller-Raceway)

 N/A 1732.1

G2 - Heat Generation Factor (Rib-Roller End)

 N/A 200
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.