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Unit of Measure

Specifications

Cone Part Number

 N/A HM926740NA

Cup Part Number

 N/A HM926710CD

Design Unit

 N/A Inch

Dimensions

d - Bore

 N/A 4 1/2 in114.300 mm

D - Cup Outer Diameter

 N/A 9.0000 in228.600 mm

T - Bearing Width across Cones

 N/A 4.5625 in115.888 mm

C - Double Cup Width

 N/A 3.3125 in84.138 mm

Ka

 N/A 0.75 in19.05 mm

Kb

 N/A 0.28 in7.13 mm

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1 N/A 0.14 in3.5 mm
r - Cup Backface "To Clear" Radius2 N/A 0.090 in2.3 mm

db - Cone Backface Backing Diameter

 N/A 5.75 in146 mm

Da - Cup Frontface Backing Diameter

 N/A 8.70 in220.98 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)3 N/A 28800 lbf128000 N
C1 - Dynamic Radial Rating (1 million revolutions)4 N/A 194000 lbf862000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)5 N/A 36400 lbf162000 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)6 N/A 50200 lbf223000 N

Factors

K - Factor7 N/A 0.79
e - ISO Factor8 N/A 0.74
Y1 - ISO Factor9 N/A 0.92
Y2 - ISO Factor10 N/A 1.36
  • 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 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values.
  • 4 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
  • 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 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 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
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