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 LL957000

Cone Part Number

 N/A LL957049

Cup Part Number

 N/A LL957010

Design Unit

 N/A Inch

Cage Material

 N/A Stamped Steel

Dimensions

d - Bore

 N/A 12.3125 in312.738 mm

D - Cup Outer Diameter

 N/A 14.125 in358.775 mm

B - Cone Width

 N/A 0.8125 in20.638 mm

C - Cup Width

 N/A 0.5625 in14.288 mm

T - Bearing Width

 N/A 0.8750 in22.225 mm

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1 N/A 0.09 in2.290 mm
r - Cup Backface "To Clear" Radius2 N/A 0.06 in1.52 mm

da - Cone Frontface Backing Diameter

 N/A 12.68 in322 mm

db - Cone Backface Backing Diameter

 N/A 12.8 in325 mm

Da - Cup Frontface Backing Diameter

 N/A 14.04 in354.10 mm

Db - Cup Backface Backing Diameter

 N/A 13.62 in345.95 mm

Ab - Cage-Cone Frontface Clearance

 N/A 0.14 in3.6 mm

Aa - Cage-Cone Backface Clearance

 N/A 0.09 in2.3 mm
a - Effective Center Location3 N/A 3.13 in79.5 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)4 N/A 7790 lbf34700 N
C1 - Dynamic Radial Rating (1 million revolutions)5 N/A 30000 lbf134000 N

C0 - Static Radial Rating

 N/A 86100 lbf383000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 11000 lbf48900 N

Factors

K - Factor7 N/A 0.71
e - ISO Factor8 N/A 0.82
Y - ISO Factor9 N/A 0.73

G1 - Heat Generation Factor (Roller-Raceway)

 N/A 990

G2 - Heat Generation Factor (Rib-Roller End)

 N/A 808
Cg - Geometry Factor10 N/A 0.209
  • 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.