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 HM318400

Cone Part Number

 N/A JHM318448A

Cup Part Number

 N/A JHM318410

Design Unit

 N/A Metric

Cage Material

 N/A Stamped Steel

Dimensions

d - Bore

 N/A 90 mm3.5433 in

D - Cup Outer Diameter

 N/A 155 mm6.1024 in

B - Cone Width

 N/A 44.000 mm1.7323 in

C - Cup Width

 N/A 35.500 mm1.3976 in

T - Bearing Width

 N/A 44.000 mm1.7323 in

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1 N/A 6.100 mm0.24 in
r - Cup Backface "To Clear" Radius2 N/A 2.54 mm0.1 in

da - Cone Frontface Backing Diameter

 N/A 101 mm3.98 in

db - Cone Backface Backing Diameter

 N/A 115 mm4.53 in

Da - Cup Frontface Backing Diameter

 N/A 149.10 mm5.87 in

Db - Cup Backface Backing Diameter

 N/A 139.95 mm5.51 in

Ab - Cage-Cone Frontface Clearance

 N/A 3.8 mm0.15 in

Aa - Cage-Cone Backface Clearance

 N/A 0.8 mm0.03 in
a - Effective Center Location3 N/A -9.9 mm-0.39 in

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)4 N/A 102000 N22900 lbf
C1 - Dynamic Radial Rating (1 million revolutions)5 N/A 392000 N88100 lbf

C0 - Static Radial Rating

 N/A 447000 N101000 lbf
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 59400 N13300 lbf

Factors

K - Factor7 N/A 1.71
e - ISO Factor8 N/A 0.34
Y - ISO Factor9 N/A 1.76

G1 - Heat Generation Factor (Roller-Raceway)

 N/A 178.9

G2 - Heat Generation Factor (Rib-Roller End)

 N/A 32.4
Cg - Geometry Factor10 N/A 0.0948
  • 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.