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

Specifications

Cone Part Number

 N/A LL217849

Cup Part Number

 N/A LL217810

Inner Spacer Part Number

 N/A LL217849XB

Outer Spacer Part Number

 N/A K143253R

Design Unit

 N/A Inch

Dimensions

d - Bore

 N/A 3 1/2 in88.900 mm

D - Cup Outer Diameter

 N/A 4.7812 in121.442 mm

T - Width

 N/A 1.4056 in35.702 mm

C - Width

 N/A 1.0930 in27.762 mm

Snap Ring Diameter

 N/A 4.97 in126.14 mm

Snap Ring Width

 N/A 0.22 in5.54 mm

Abutment and Fillet Dimensions

R - Cone Backface "To Clear" Radius1 N/A 0.06 in1.520 mm
r - Cup Backface "To Clear" Radius2 N/A 0.06 in1.52 mm

db - Cone Backface Backing Diameter

 N/A 3.82 in97 mm

Da - Cup Frontface Backing Diameter

 N/A 4.65 in117.10 mm

Basic Load Ratings

C90 - Dynamic Radial Rating (90 million revolutions)

 N/A 3470 lbf15400 N
C1 - Dynamic Radial Rating (1 million revolutions)3 N/A 23300 lbf104000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)4 N/A 1960 lbf8730 N
C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)5 N/A 6030 lbf26800 N

Factors

K - Factor6 N/A 1.77
e - ISO Factor7 N/A 0.33
Y1 - ISO Factor8 N/A 2.04
Y2 - ISO Factor9 N/A 3.04
  • 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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