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 80300

Cone Part Number

 N/A 80385

Cup Part Number

 N/A 80325

Design Unit

 N/A Inch

Cage Material

 N/A Stamped Steel

Related Assembly Number(s)

 N/A 80385-90013 80385-90014 80385-902A1

Dimensions

d - Bore

 N/A 17.0000 in431.800 mm

D - Cup Outer Diameter

 N/A 21.0 in533.400 mm

B - Cone Width

 N/A 1.8125 in46.038 mm

C - Cup Width

 N/A 1.3750 in34.925 mm

T - Bearing Width

 N/A 1.8125 in46.038 mm

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1 N/A 0.13 in3.300 mm
r - Cup Backface "To Clear" Radius2 N/A 0.130 in3.30 mm

da - Cone Frontface Backing Diameter

 N/A 17.56 in446 mm

db - Cone Backface Backing Diameter

 N/A 17.72 in450 mm

Da - Cup Frontface Backing Diameter

 N/A 20.24 in514.10 mm

Db - Cup Backface Backing Diameter

 N/A 20.08 in510.03 mm

Ab - Cage-Cone Frontface Clearance

 N/A 0.11 in2.8 mm

Aa - Cage-Cone Backface Clearance

 N/A 0.12 in3 mm
a - Effective Center Location3 N/A 0.92 in23.4 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)4 N/A 36400 lbf162000 N
C1 - Dynamic Radial Rating (1 million revolutions)5 N/A 140000 lbf624000 N

C0 - Static Radial Rating

 N/A 342000 lbf1520000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)6 N/A 19000 lbf84700 N

Factors

K - Factor7 N/A 1.91
e - ISO Factor8 N/A 0.31
Y - ISO Factor9 N/A 1.96
Cg - Geometry Factor10 N/A 0.181
  • 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.