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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

 14000

Cone Part Number

 14118AS

Cup Part Number

 14272

Design Unit

 Inch

Cage Material

 Stamped Steel

Dimensions

d - Bore

 1.1806 in29.987 mm

D - Cup Outer Diameter

 2.7170 in69.012 mm

B - Cone Width

 0.7560 in19.202 mm

C - Cup Width

 0.5625 in14.288 mm

T - Bearing Width

 0.75 in19.05 mm

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1 0.03 in0.800 mm
r - Cup Backface "To Clear" Radius2 0.130 in3.30 mm

da - Cone Frontface Backing Diameter

 1.46 in37 mm

db - Cone Backface Backing Diameter

 1.48 in37.5 mm

Da - Cup Frontface Backing Diameter

 2.52 in63.00 mm

Db - Cup Backface Backing Diameter

 2.32 in58.93 mm

Ab - Cage-Cone Frontface Clearance

 0.09 in2.3 mm

Aa - Cage-Cone Backface Clearance

 0.02 in0.5 mm
a - Effective Center Location3 -0.17 in-4.3 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)4 3770 lbf16800 N
C1 - Dynamic Radial Rating (1 million revolutions)5 14500 lbf64700 N

C0 - Static Radial Rating

 13900 lbf61700 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 2470 lbf11000 N

Factors

K - Factor7 1.53
e - ISO Factor8 0.38
Y - ISO Factor9 1.57

G1 - Heat Generation Factor (Roller-Raceway)

 18

G2 - Heat Generation Factor (Rib-Roller End)

 13.3
Cg - Geometry Factor10 0.0668
  • 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.