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Tapered Roller Bearings - 2TS-IM (Matched Bearing Assembly, Indirect Mount)
Unit of Measure

Specifications

Cone Part Number

 N/A 25590

Cup Part Number

 N/A 25520

Inner Spacer Part Number

 N/A X1S-25590

Outer Spacer Part Number

 N/A Y2S-25520

Design Unit

 N/A Inch

Dimensions

d - Bore

 N/A 1.7960 in45.618 mm

D - Cup Outer Diameter

 N/A 3.2650 in82.931 mm

T - Width

 N/A 2.2500 in57.150 mm

C - Width

 N/A 1.875 in47.625 mm

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1 N/A 0.14 in3.600 mm
r - Cup Backface "To Clear" Radius2 N/A 0.030 in0.8 mm

db - Cone Backface Backing Diameter

 N/A 2.28 in58 mm

Da - Cup Frontface Backing Diameter

 N/A 3.05 in77.00 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)3 N/A 5270 lbf23500 N
C1 - Dynamic Radial Rating (1 million revolutions)4 N/A 35400 lbf158000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)5 N/A 3020 lbf13500 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)6 N/A 9180 lbf40900 N

Factors

K - Factor7 N/A 1.74
e - ISO Factor8 N/A 0.33
Y1 - ISO Factor9 N/A 2.02
Y2 - ISO Factor10 N/A 3
  • 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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