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Unit of Measure

Key Dimensions

Cone Part Number

 N/A NA72212

Cup Part Number

 N/A 72488D

Design Unit

 N/A Inch

Bore (d)

 N/A 2.125 in53.975 mm

O.D. (D)

 N/A 4.875 in123.825 mm
Dynamic Radial Load Rating - 90M Revs (C90) 1 N/A 9620 lbf42800 N
Dynamic Radial Load Rating 2-Row - 90M Revs (C90-2row)2 N/A 16800 lbf74500 N
K Factor 3 N/A 0.79
e Factor 4 N/A 0.74

Other Dimensions

T - Bearing Width across Cones

 N/A 3.0625 in77.788 mm
Max Shaft Fillet Radius5 N/A 0.09 in2.3 mm
Max Housing Fillet Radius6 N/A 0.06 in1.5 mm

Outer Ring Width (C)

 N/A 2.1875 in55.563 mm

Shaft Backing Shoulder Diameter - Backface (db)

 N/A 2.91 in74 mm

Housing Backing Shoulder Diameter - Frontface (Da)

 N/A 4.56 in115.82 mm

Weight

 N/A 9 lb4.08 Kg

Ratings

C1 - Dynamic Radial Rating (1 million revolutions)7 N/A 64600 lbf287000 N
Ca90 - Dynamic Thrust Rating (90 million revolutions)8 N/A 12100 lbf54000 N

Factors

Y1 Factor 9 N/A 0.92
Y2 Factor 10 N/A 1.36
  • 1 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values.
  • 2 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.
  • 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 maximum fillet radii will be cleared by the bearing corners.
  • 6 These maximum fillet radii will be cleared by the bearing corners.
  • 7 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
  • 8 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.
  • 9 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 10 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.