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 67800

Cone Part Number

 N/A NA67885SW

Bore (d)

 N/A 7.5 in190.5 mm
Dynamic Radial Load Rating - 90M Revs (C90) 1 N/A 24300 lbf108000 N
Dynamic Radial Load Rating - 1M Revs (C1) 2 N/A 93600 lbf416000 N
K Factor 3 N/A 1.22

Other Dimensions

Inner Ring Width (B)

 N/A 2.1562 in54.767 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 8.23 in209 mm

Cage Location Relative to Frontface (Ab) 

 N/A -0.08 in-2 mm

Cage Location Relative to Backface (Aa)

 N/A 0.3 in7.6 mm
Effective Center Location5 N/A 0.27 in6.9 mm

Weight

 N/A 39.29 lb

Ratings

Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 19800 lbf88200 N

Factors

G1 Factor

 N/A 727.9

G2 Factor

 N/A 146.6
  • 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.