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Wheel Bearing

Wheel Bearing

$31.52

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Rafna R290/R450 Hirail Wheel Bearing

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Brands:
SKU: LM104949
Brand:

Series

 LM104900

Cone Part Number

 LM104949

Cup Part Number

 LM104911

Design Unit

 Inch

Cage Material

 Stamped Steel

Related Assembly Number(s)

 LM104949-902A4

Dimensions

d – Bore

 2 in50.8 mm

D – Cup Outer Diameter

 3.2500 in82.550 mm

B – Cone Width

 0.875 in22.225 mm

C – Cup Width

 0.6500 in16.510 mm

T – Bearing Width

 0.8500 in21.590 mm

Abutment and Fillet Dimensions

R – Cone Backface “To Clear” Radius1 0.14 in3.560 mm
r – Cup Backface “To Clear” Radius2 0.050 in1.27 mm

da – Cone Frontface Backing Diameter

 2.2 in56 mm

db – Cone Backface Backing Diameter

 2.48 in63 mm

Da – Cup Frontface Backing Diameter

 3.11 in78.00 mm

Db – Cup Backface Backing Diameter

 2.95 in74.93 mm

Ab – Cage-Cone Frontface Clearance

 0.1 in2.5 mm

Aa – Cage-Cone Backface Clearance

 0.03 in0.8 mm
a – Effective Center Location3 -0.23 in-5.8 mm

Basic Load Ratings

C90 – Dynamic Radial Rating (90 million revolutions)4 5610 lbf25000 N
C1 – Dynamic Radial Rating (1 million revolutions)5 21700 lbf96300 N

C0 – Static Radial Rating

 23400 lbf104000 N
Ca90 – Dynamic Thrust Rating (90 million revolutions)6 2930 lbf13000 N

Factors

K – Factor7 1.91
e – ISO Factor8 0.31
Y – ISO Factor9 1.97

G1 – Heat Generation Factor (Roller-Raceway)

 38.8

G2 – Heat Generation Factor (Rib-Roller End)

 19.3
Cg – Geometry Factor10 0.0801
  • 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 Negative value indicates effective center inside cone backface.
  • 4 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values.
  • 5 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
  • 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 Geometry constant for Lubrication Life Adjustment Factor a3l.
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Weight 0.6 lbs
Dimensions 3.25 × 3.25 × 1.25 in

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