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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

N/A 17500

Cone Part Number

N/A 17580

Cup Part Number

N/A 17520

Design Units

N/A Imperial

Bearing Weight

N/A 0.100 Kg0.30 lb

Cage Type

N/A Stamped Steel

Dimensions

d - Bore

N/A 15.875 mm0.6250 in

D - Cup Outer Diameter

N/A 42.863 mm1.6875 in

B - Cone Width

N/A 16.670 mm0.6563 in

C - Cup Width

N/A 13.495 mm0.5313 in

T - Bearing Width

N/A 16.670 mm0.6563 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 1.52 mm0.06 in

da - Cone Frontface Backing Diameter

N/A 21.08 mm0.83 in

db - Cone Backface Backing Diameter

N/A 23.11 mm0.91 in

Da - Cup Frontface Backing Diameter

N/A 39.62 mm1.56 in

Db - Cup Backface Backing Diameter

N/A 36.58 mm1.44 in

Ab - Cage-Cone Frontface Clearance

N/A 2.8 mm0.11 in

Aa - Cage-Cone Backface Clearance

N/A -0.3 mm-0.01 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 8150 N1830 lbf
C1 - Dynamic Radial Rating (1 million revolutions)5 N/A 31400 N7070 lbf

C0 - Static Radial Rating

N/A 29200 N6560 lbf
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 4620 N1040 lbf

Factors

K - Factor7 N/A 1.76
e - ISO Factor8 N/A 0.33
Y - ISO Factor9 N/A 1.81

G1 - Heat Generation Factor (Roller-Raceway)

N/A 5.3

G2 - Heat Generation Factor (Rib-Roller End)

N/A 4.53

Cg - Geometry Factor

N/A 0.0423
  • 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.