Montage of Timken Bearing Products
Batch CAD Cart (0) ▾
  • Cart is empty
  1. Click Here for Batch Download
Request Information Add to CAD Cart
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 56000

Cone Part Number

 N/A NA56425SW

Design Units

 N/A Imperial

Cage Type

 N/A Stamped Steel

Dimensions

d - Cone Bore

 N/A 4 1/4 in107.95 mm

B - Cone Width

 N/A 1.75 in44.45 mm

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1 N/A 0.14 in3.556 mm

da - Cone Frontface Backing Diameter

 N/A 0 in0 mm

db - Cone Backface Backing Diameter

 N/A 4.84 in123 mm

Ab - Cage-Cone Frontface Clearance

 N/A -0.1 in-0.25 mm

Aa - Cage-Cone Backface Clearance

 N/A 0.27 in6.9 mm
a - Effective Center Location2 N/A -0.05 in-1.3 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)3 N/A 13200 lbf58700 N
C1 - Dynamic Radial Rating (1 million revolutions)4 N/A 50900 lbf226000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)5 N/A 11200 lbf50000 N

Factors

K - Factor6 N/A 1.18

G1 - Heat Generation Factor (Roller-Raceway)

 N/A 190.9

G2 - Heat Generation Factor (Rib-Roller End)

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