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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.

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Unit of Measure

Specifications

Series

N/A 15000

Cone Part Number

N/A 15102

Cup Part Number

N/A 15243

Design Units

N/A Imperial

Bearing Weight

N/A 0.30 Kg0.600 lb

Cage Type

N/A Stamped Steel

Dimensions

d - Bore

N/A 25.400 mm1.0000 in

D - Cup Outer Diameter

N/A 61.913 mm2.4375 in

B - Cone Width

N/A 20.638 mm0.8125 in

C - Cup Width

N/A 14.288 mm0.5625 in

T - Bearing Width

N/A 19.050 mm0.7500 in

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1 N/A 1.520 mm0.06 in
r - Cup Backface "To Clear" Radius2 N/A 2.03 mm0.08 in

da - Cone Frontface Backing Diameter

N/A 31.5 mm1.24 in

db - Cone Backface Backing Diameter

N/A 34.04 mm1.34 in

Da - Cup Frontface Backing Diameter

N/A 58.42 mm2.30 in

Db - Cup Backface Backing Diameter

N/A 54.10 mm2.13 in

Ab - Cage-Cone Frontface Clearance

N/A 1.8 mm0.07 in

Aa - Cage-Cone Backface Clearance

N/A 0.8 mm0.03 in
a - Effective Center Location3 N/A -5.8 mm-0.23 in

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)4 N/A 3490 lbf15500 N
C1 - Dynamic Radial Rating (1 million revolutions)5 N/A 13500 lbf59900 N

C0 - Static Radial Rating

N/A 12100 lbf53900 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 2090 lbf9310 N

Factors

K - Factor7 N/A 1.67
e - ISO Factor8 N/A 0.35
Y - ISO Factor9 N/A 1.71

G1 - Heat Generation Factor (Roller-Raceway)

N/A 14.6

G2 - Heat Generation Factor (Rib-Roller End)

N/A 10
Cg - Geometry Factor10 N/A 0.0606
  • 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.
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