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Tapered Roller Bearings - 2S (Matched Bearing Assembly, with snap ring spacer)
Unit of Measure

Specifications

Cone Part Number

 N/A HM88649

Cup Part Number

 N/A HM88610

Inner Spacer Part Number

 N/A K152757

Outer Spacer Part Number

 N/A K152758

Design Unit

 N/A Inch

Dimensions

d - Bore

 N/A 1.3750 in34.925 mm

D - Cup Outer Diameter

 N/A 2.8438 in72.233 mm

T - Width

 N/A 2.1941 in55.730 mm

C - Width

 N/A 1.7565 in44.614 mm

Snap Ring Diameter

 N/A 2.95 in75.00 mm

Snap Ring Width

 N/A 0.19 in4.93 mm

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1 N/A 0.09 in2.290 mm
r - Cup Backface "To Clear" Radius2 N/A 0.090 in2.29 mm

db - Cone Backface Backing Diameter

 N/A 1.91 in48.5 mm

Da - Cup Frontface Backing Diameter

 N/A 2.74 in69.10 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)

 N/A 4480 lbf19900 N
C1 - Dynamic Radial Rating (1 million revolutions)3 N/A 30100 lbf134000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)4 N/A 4180 lbf18600 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)5 N/A 7790 lbf34700 N

Factors

K - Factor6 N/A 1.07
e - ISO Factor7 N/A 0.55
Y1 - ISO Factor8 N/A 1.24
Y2 - ISO Factor9 N/A 1.84
  • 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 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
  • 4 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.
  • 5 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.
  • 6 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 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.
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