Aerospace / Military
Aerospace Series General Aviation Rod Ends Spherical Bearings Mil Spec Series Rod Ends Spherical Bearings Bushings Approved Part Numbers
Commercial / Industrial
Rod End Bearings Inch Rod Ends Metric Rod Ends Spherical Bearings Inch Spherical Bearings Metric Spherical Bearings
Technical Resources
Terms and Definitions Articles Technical Data FAQs Key Term Translation Custom Engineered Products
Online Catalog
Engineers power search our entire catalog of bearing and bushings, with access to every attribute and technical specification possible. View our online catalog...
CAD (0) ▾
  • Cart is empty
  1. Request CAD files
Request Information Add to CAD Cart
Tapered Roller Bearings - 2S (Matched Bearing Assembly, with snap ring spacer)
Unit of Measure

Specifications

Cone Part Number

 N/A 392

Cup Part Number

 N/A 394A

Inner Spacer Part Number

 N/A K444667R

Outer Spacer Part Number

 N/A K444668R

Design Unit

 N/A Inch

Dimensions

d - Bore

 N/A 2 7/16 in61.913 mm

D - Cup Outer Diameter

 N/A 4.3307 in110 mm

T - Width

 N/A 1.9502 in49.535 mm

C - Width

 N/A 1.7002 in43.185 mm

Snap Ring Diameter

 N/A 4.57 in116.10 mm

Snap Ring Width

 N/A 0.22 in5.54 mm

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1 N/A 0.03 in0.800 mm
r - Cup Backface "To Clear" Radius2 N/A 0.050 in1.27 mm

db - Cone Backface Backing Diameter

 N/A 2.76 in70 mm

Da - Cup Frontface Backing Diameter

 N/A 4.15 in105.40 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)

 N/A 5760 lbf25600 N
C1 - Dynamic Radial Rating (1 million revolutions)3 N/A 38700 lbf172000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)4 N/A 3970 lbf17600 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)5 N/A 10000 lbf44600 N

Factors

K - Factor6 N/A 1.45
e - ISO Factor7 N/A 0.4
Y1 - ISO Factor8 N/A 1.68
Y2 - ISO Factor9 N/A 2.5
  • 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 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
  • 4 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.
  • 5 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.
  • 6 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 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.