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 350

Cup Part Number

 N/A 354X

Design Unit

 N/A Inch

Cage Material

 N/A Stamped Steel

Dimensions

d - Bore

 N/A 1.5748 in40 mm

D - Cup Outer Diameter

 N/A 3.3465 in85.001 mm

B - Cone Width

 N/A 0.8540 in21.692 mm

C - Cup Width

 N/A 0.6875 in17.463 mm

T - Bearing Width

 N/A 0.8125 in20.638 mm

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1 N/A 0.16 in4.1 mm
r - Cup Backface "To Clear" Radius2 N/A 0.06 in1.52 mm

da - Cone Frontface Backing Diameter

 N/A 1.83 in46.5 mm

db - Cone Backface Backing Diameter

 N/A 2.13 in54 mm

Da - Cup Frontface Backing Diameter

 N/A 3.18 in80.77 mm

Db - Cup Backface Backing Diameter

 N/A 3.03 in76.96 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 4770 lbf21200 N
C1 - Dynamic Radial Rating (1 million revolutions)5 N/A 18400 lbf81800 N

C0 - Static Radial Rating

 N/A 20000 lbf88800 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 2500 lbf11100 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.