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 M349500

Cone Part Number

 N/A M349549A

Cup Part Number

 N/A M349511

Design Unit

 N/A Inch

Cage Material

 N/A Stamped Steel

Dimensions

d - Bore

 N/A 10.1250 in257.175 mm

D - Cup Outer Diameter

 N/A 13-1/2 in342.900 mm

B - Cone Width

 N/A 2.2500 in57.150 mm

C - Cup Width

 N/A 1.7500 in44.450 mm

T - Bearing Width

 N/A 2.2500 in57.150 mm

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1 N/A 0.420 in10.700 mm
r - Cup Backface "To Clear" Radius2 N/A 0.130 in3.30 mm

da - Cone Frontface Backing Diameter

 N/A 10.59 in269 mm

db - Cone Backface Backing Diameter

 N/A 11.38 in289 mm

Da - Cup Frontface Backing Diameter

 N/A 13.15 in333.00 mm

Db - Cup Backface Backing Diameter

 N/A 12.68 in322.07 mm

Ab - Cage-Cone Frontface Clearance

 N/A 0.17 in4.3 mm

Aa - Cage-Cone Backface Clearance

 N/A 0.15 in3.8 mm
a - Effective Center Location3 N/A 0.1 in2.5 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)4 N/A 39700 lbf176000 N
C1 - Dynamic Radial Rating (1 million revolutions)5 N/A 153000 lbf680000 N

C0 - Static Radial Rating

 N/A 321000 lbf1430000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 23600 lbf105000 N

Factors

K - Factor7 N/A 1.68
e - ISO Factor8 N/A 0.35
Y - ISO Factor9 N/A 1.73
Cg - Geometry Factor10 N/A 0.147
  • 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.