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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 32005X

Cone Part Number

N/A XAA32005X

Design Units

N/A METRIC

Cage Type

N/A Stamped Steel
C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)1 N/A 14300 lbf63500 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)2 N/A 3700 lbf16500 N

Dimensions

d - Bore

N/A 25.000 mm0.9843 in

B - Cone Width

N/A 15.000 mm0.5906 in

WPD

N/A 43.6 mm1.72 in

DD

N/A 37.8 mm1.49 in

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius3 N/A 3.300 mm0.13 in

da - Cone Frontface Backing Diameter

N/A 30 mm1.18 in

db - Cone Backface Backing Diameter

N/A 37 mm1.46 in

Ab - Cage-Cone Frontface Clearance

N/A 1.8 mm0.07 in

Aa - Cage-Cone Backface Clearance

N/A 0 mm0 in
a - Effective Center Location4 N/A -3.3 mm-0.13 in

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)5 N/A 9460 N2130 lbf
C1 - Dynamic Radial Rating (1 million revolutions)6 N/A 36500 N8200 lbf

C0 - Static Radial Rating

N/A 35400 N7960 lbf
Ca90 - Dynamic Thrust Rating (90 million revolutions)7 N/A 6970 N1570 lbf

Factors

K - Factor8 N/A 1.36

G1 - Heat Generation Factor (Roller-Raceway)

N/A 8.6

G2 - Heat Generation Factor (Rib-Roller End)

N/A 8.7
Cg - Geometry Factor9 N/A 0.0546
  • 1 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
  • 2 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.
  • 3 These maximum fillet radii will be cleared by the bearing corners.
  • 4 Negative value indicates effective center inside cone backface.
  • 5 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values.
  • 6 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
  • 7 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.
  • 8 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 9 Geometry constant for Lubrication Life Adjustment Factor a3l.
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