The Timken Company
The Timken Company
4500 Mt Pleasant St. NW
N. Canton, OH 44720
Phone: (234) 262-3000
E-Mail: CustomerCAD@timken.com • Web site: www.timken.com
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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 X30203

Cup Part Number

 N/A Y30203

Bore (d)

 N/A 17 mm0.6693 in

O.D. (D)

 N/A 40 mm1.5748 in

Width (T)

 N/A 13.250 mm0.5217 in
Dynamic Radial Load Rating - 1M Revs (C1) 1 N/A 21300 N4800 lbf
Dynamic Radial Load Rating - 90M Revs (C90) 2 N/A 5530 N1240 lbf
e Factor 3 N/A 0.35
K Factor 4 N/A 1.69

Series

 N/A 30203
Y Factor 5 N/A 1.74

Other Dimensions

Inner Ring Width (B)

 N/A 12.000 mm0.4724 in

Outer Ring Width (C)

 N/A 11.000 mm0.4331 in
Effective Center Location6 N/A -3.6 mm-0.14 in
Max Shaft Fillet Radius7 N/A 1.02 mm0.04 in
Max Housing Fillet Radius8 N/A 1.02 mm0.04 in

Shaft Backing Shoulder Diameter - Frontface (da)

 N/A 21 mm0.83 in

Shaft Backing Shoulder Diameter - Backface (db)

 N/A 22 mm0.87 in

Housing Backing Shoulder Diameter - Frontface (Da)

 N/A 37.59 mm1.48 in

Housing Backing Shoulder Diameter - Backface (Db)

 N/A 35.05 mm1.38 in

Cage Location Relative to Backface (Aa)

 N/A -0.3 mm-0.01 in

Cage Location Relative to Frontface (Ab) 

 N/A 2 mm0.08 in

Weight

 N/A 0.10 Kg0.2 lb

Ratings

Dynamic Axial Rating - 90M Revs (Ca90)9 N/A 3270 N735 lbf

Static Radial Load Rating (C0)

 N/A 19900 N4460 lbf

Factors

G1 Factor

 N/A 4.2

G2 Factor

 N/A 6
Geometry Factor (Cg)10 N/A 0.0398
  • 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.