88900 / 88126 Timken Tapered Roller Bearing Cone & Cup USA 9" x 12.650" x 2"

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

88000

Cone Part Number

88900

Cup Part Number

88126

Design Unit

Inch

Cage Material

Stamped Steel

Dimensions

d - Bore

9.0000 in228.600 mm

D - Cup Outer Diameter

12.6250 in320.675 mm

B - Cone Width

1.9375 in49.213 mm

C - Cup Width

1.3125 in33.338 mm

T - Bearing Width

2.0000 in50.800 mm

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius10.25 in6.4 mm
r - Cup Backface "To Clear" Radius20.130 in3.30 mm

da - Cone Frontface Backing Diameter

9.53 in242 mm

db - Cone Backface Backing Diameter

9.96 in253 mm

Da - Cup Frontface Backing Diameter

12.20 in309.88 mm

Db - Cup Backface Backing Diameter

11.77 in298.96 mm

Ab - Cage-Cone Frontface Clearance

0.14 in3.6 mm

Aa - Cage-Cone Backface Clearance

0.41 in10.4 mm
a - Effective Center Location30.56 in14.2 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)432200 lbf143000 N
C1 - Dynamic Radial Rating (1 million revolutions)5124000 lbf552000 N

C0 - Static Radial Rating

185000 lbf821000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)626800 lbf119000 N

Factors

K - Factor71.2
e - ISO Factor80.49
Y - ISO Factor91.23
Cg - Geometry Factor100.135
  • 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.