The Timken Company
The Timken Company
4500 Mt Pleasant St. NW
N. Canton, OH 44720
Phone: (234) 262-3000
E-Mail: CustomerCAD@timken.com • Web site: www.timken.com
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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

Key Dimensions

Series

 N/A 56000

Cone Part Number

 N/A NA56425SW

Bore (d)

 N/A 4.25 in107.95 mm
Dynamic Radial Load Rating - 90M Revs (C90) 1 N/A 13200 lbf58700 N
Dynamic Radial Load Rating - 1M Revs (C1) 2 N/A 50900 lbf226000 N
K Factor 3 N/A 1.18

Other Dimensions

Inner Ring Width (B)

 N/A 1.75 in44.45 mm
Max Shaft Fillet Radius4 N/A 0.14 in3.556 mm

Shaft Backing Shoulder Diameter - Frontface (da)

 N/A 0 in0 mm

Shaft Backing Shoulder Diameter - Backface (db)

 N/A 4.84 in123 mm

Cage Location Relative to Frontface (Ab) 

 N/A -0.1 in-0.25 mm

Cage Location Relative to Backface (Aa)

 N/A 0.27 in6.9 mm
Effective Center Location5 N/A -0.05 in-1.3 mm

Weight

 N/A 13.4602 lb

Ratings

Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 11200 lbf50000 N

Factors

G1 Factor

 N/A 190.9

G2 Factor

 N/A 47.7
  • 1 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values.
  • 2 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
  • 3 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 4 These maximum fillet radii will be cleared by the bearing corners.
  • 5 Negative value indicates effective center inside cone backface.
  • 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.