Montage of Timken Bearing Products
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Key Features

  • Available in single, double and multi-row configurations, as well as proprietary sizes
  • Designed in collaboration with OE engineers to design, engineer and test bearings for premium performance in many applications
  • Power dense designs allow for heavier loads and can help extend bearing life
  • Optimized internal geometry lowers torque and operating temperatures to extend lubrication system life
  • Can be designed to withstand high-corrosive, high-temperature and vacuum or low-lubrication environments with proprietary enhancements
Unit of Measure

Key Dimensions

Cone Part Number

 N/A L281148

Cup Part Number

 N/A L281110

Bore (d)

 N/A 26 in660.4 mm

O.D. (D)

 N/A 32 in812.8 mm

Width (T)

 N/A 3.75 in95.25 mm
Dynamic Radial Load Rating - 1M Revs (C1)1 N/A 570000 lbf2530000 N
Dynamic Radial Load Rating - 90M Revs (C90) 2 N/A 148000 lbf657000 N
e Factor3 N/A 0.33
K Factor4 N/A 1.76
Y Factor 5 N/A 1.8

Other Dimensions

Weight

 N/A 220.30 lb99.900 Kg

Inner Ring Width (B)

 N/A 3.75 in95.25 mm

Outer Ring Width (C)

 N/A 2.875 in73.025 mm
Effective Center Location6 N/A 1.1 in27.9 mm
Max Shaft Fillet Radius7 N/A 0.25 in6.4 mm
Max Housing Fillet Radius8 N/A 0.25 in6.35 mm

Shaft Backing Shoulder Diameter - Frontface (da)

 N/A 26.81 in681 mm

Shaft Backing Shoulder Diameter - Backface (db)

 N/A 27.28 in693 mm

Housing Backing Shoulder Diameter - Frontface (Da)

 N/A 31.32 in795.53 mm

Housing Backing Shoulder Diameter - Backface (Db)

 N/A 30.59 in776.99 mm

Cage Location Relative to Backface (Aa)

 N/A 0.29 in7.4 mm

Cage Location Relative to Frontface (Ab)

 N/A 0.27 in6.9 mm

Ratings

Dynamic Axial Rating - 90M Revs (Ca90)9 N/A 84100 lbf374000 N

Static Radial Load Rating (C0)

 N/A 1340000 lbf5940000 N

Factors

G1 Factor

 N/A 11700

G2 Factor

 N/A 915
Geometry Factor (Cg)10 N/A 0.289
  • 1 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
  • 2 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values.
  • 3 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 4 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 5 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 6 Negative value indicates effective center inside cone backface.
  • 7 These maximum fillet radii will be cleared by the bearing corners.
  • 8 These maximum fillet radii will be cleared by the bearing corners.
  • 9 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.
  • 10 Geometry constant for Lubrication Life Adjustment Factor a3l.