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Unit of Measure

Specifications

Cone Part Number

 N/A NA26118

Cup Part Number

 N/A 26284D

Design Unit

 N/A Inch

Dimensions

d - Bore

 N/A 1.1806 in29.987 mm

D - Cup Outer Diameter

 N/A 2.8336 in71.973 mm

T - Bearing Width across Cones

 N/A 1.6835 in42.76 mm

C - Double Cup Width

 N/A 1.4375 in36.513 mm

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1 N/A 0.06 in1.5 mm
r - Cup Backface "To Clear" Radius2 N/A 0.030 in0.8 mm

db - Cone Backface Backing Diameter

 N/A 1.5 in38 mm

Da - Cup Frontface Backing Diameter

 N/A 2.60 in65.02 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)3 N/A 4060 lbf18100 N
C1 - Dynamic Radial Rating (1 million revolutions)4 N/A 23000 lbf102000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)5 N/A 2500 lbf11100 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)6 N/A 7070 lbf31400 N

Factors

K - Factor7 N/A 1.62
e - ISO Factor8 N/A 0.36
Y1 - ISO Factor9 N/A 1.87
Y2 - ISO Factor10 N/A 2.79
  • 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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