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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 M272749

Cup Part Number

 N/A M272710

Bore (d)

 N/A 18.875 in479.425 mm

O.D. (D)

 N/A 26.75 in679.45 mm

Width (T)

 N/A 5.0625 in128.588 mm
Dynamic Radial Load Rating - 1M Revs (C1)1 N/A 839000 lbf3730000 N
Dynamic Radial Load Rating - 90M Revs (C90) 2 N/A 218000 lbf968000 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 328.60 lb149.100 Kg

Inner Ring Width (B)

 N/A 5.0625 in128.588 mm

Outer Ring Width (C)

 N/A 4 in101.6 mm
Effective Center Location6 N/A -0.35 in-8.9 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 19.96 in507 mm

Shaft Backing Shoulder Diameter - Backface (db)

 N/A 20.31 in516 mm

Housing Backing Shoulder Diameter - Frontface (Da)

 N/A 25.53 in648.46 mm

Housing Backing Shoulder Diameter - Backface (Db)

 N/A 24.92 in632.97 mm

Cage Location Relative to Backface (Aa)

 N/A 0.31 in7.9 mm

Cage Location Relative to Frontface (Ab)

 N/A 0.41 in10.4 mm

Ratings

Dynamic Axial Rating - 90M Revs (Ca90)9 N/A 124000 lbf551000 N

Static Radial Load Rating (C0)

 N/A 1660000 lbf7400000 N

Factors

G1 Factor

 N/A 8110

G2 Factor

 N/A 508
Geometry Factor (Cg)10 N/A 0.26
  • 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.