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

Key Dimensions

Cone Part Number

34300

Cup Part Number

34478

Bore (d)

3 in76.2 mm

O.D. (D)

4.7812 in121.442 mm

Width (T)

0.9688 in24.608 mm
Dynamic Radial Load Rating - 1M Revs (C1)123000 lbf102000 N
Dynamic Radial Load Rating - 90M Revs (C90) 25960 lbf26500 N
e Factor30.45
K Factor41.3
Y Factor 51.33

Other Dimensions

Weight

2.1 lb1.00 Kg

Inner Ring Width (B)

0.906 in23.012 mm

Outer Ring Width (C)

0.6875 in17.463 mm
Effective Center Location60.06 in1.5 mm
Max Shaft Fillet Radius70.080 in2 mm
Max Housing Fillet Radius80.08 in2.03 mm

Shaft Backing Shoulder Diameter - Frontface (da)

3.27 in83 mm

Shaft Backing Shoulder Diameter - Backface (db)

3.39 in86 mm

Housing Backing Shoulder Diameter - Frontface (Da)

4.60 in116.10 mm

Housing Backing Shoulder Diameter - Backface (Db)

4.33 in109.98 mm

Cage Location Relative to Backface (Aa)

0.09 in2.3 mm

Cage Location Relative to Frontface (Ab)

0.1 in2.5 mm

Ratings

Dynamic Axial Rating - 90M Revs (Ca90)94600 lbf20500 N

Static Radial Load Rating (C0)

30600 lbf136000 N

Factors

G1 Factor

69.3

G2 Factor

27
Geometry Factor (Cg)100.109
  • 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.