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 355

Cone Part Number

 N/A 355

Cup Part Number

 N/A 353

Design Unit

 N/A Inch

Cage Material

 N/A Stamped Steel

Dimensions

d - Bore

 N/A 1 3/4 in44.45 mm

D - Cup Outer Diameter

 N/A 3.5433 in90 mm

B - Cone Width

 N/A 0.8540 in21.692 mm

C - Cup Width

 N/A 0.9055 in23.000 mm

T - Bearing Width

 N/A 0.9056 in23.002 mm

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1 N/A 0.09 in2.300 mm
r - Cup Backface "To Clear" Radius2 N/A 0.08 in2.03 mm

da - Cone Frontface Backing Diameter

 N/A 1.97 in50 mm

db - Cone Backface Backing Diameter

 N/A 2.13 in54 mm

Da - Cup Frontface Backing Diameter

 N/A 3.27 in83.06 mm

Db - Cup Backface Backing Diameter

 N/A 3.15 in80.01 mm

Ab - Cage-Cone Frontface Clearance

 N/A 0.09 in2.3 mm

Aa - Cage-Cone Backface Clearance

 N/A 0 in0 mm
a - Effective Center Location3 N/A -0.19 in-4.8 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)4 N/A 5650 lbf25100 N
C1 - Dynamic Radial Rating (1 million revolutions)5 N/A 21800 lbf97000 N

C0 - Static Radial Rating

 N/A 20000 lbf88800 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 2960 lbf13200 N

Factors

K - Factor7 N/A 1.91
e - ISO Factor8 N/A 0.31
Y - ISO Factor9 N/A 1.96

G1 - Heat Generation Factor (Roller-Raceway)

 N/A 30

G2 - Heat Generation Factor (Rib-Roller End)

 N/A 12.2
Cg - Geometry Factor10 N/A 0.0732
  • 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 Negative value indicates effective center inside cone backface.
  • 4 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values.
  • 5 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
  • 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.
  • 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.
  • 10 Geometry constant for Lubrication Life Adjustment Factor a3l.