TDI bearings have a one-piece double inner race and two single outer races and are typically supplied complete with an outer race spacer as a pre-set assembly. The bearing can be used at fixed positions on rotation shaft applications. For rotating housing application it can be used to float on the stationary shaft.
Unit of Measure

Key Dimensions

Cone Part Number

 N/A HM256848DWH

Bore (d)

 N/A 11.7500 in298.450 mm
Dynamic Radial Load Rating - 1M Revs (C1) 1 N/A 321000 lbf1430000 N
Dynamic Radial Load Rating - 90M Revs (C90) 2 N/A 83300 lbf371000 N
Dynamic Radial Load Rating 2-Row - 90M Revs (C90-2row) 3 N/A 145000 lbf645000 N
K Factor 4 N/A 1.73

Note

 N/A This part has a non-standard shoulder design. Please email customer CAD for shoulder details to ensure the proper design of mating components.

Other Dimensions

Weight

 N/A 66.3 Kg146.2 lb

Inner Ring Width (B)

 N/A 5.9375 in150.813 mm
Max Shaft Fillet Radius5 N/A 0.13 in3.300 mm

Shaft Backing Shoulder Dia. - Frontface (da)

 N/A 12.48 in317 mm

Cage Location rel. to FF (Ab)

 N/A 0.19 in4.8 mm

Ratings

Dynamic Axial Rating - 90M Revs (Ca90)6 N/A 48000 lbf214000 N
Dynamic Radial Load Rating 2-Row - 1M Revs (C1)7 N/A 560000 lbf2490000 N

Static Radial Load Rating (C0)

 N/A 587000 lbf2610000 N

Factors

Geometry Factor (Cg)8 N/A 0.175
  • 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 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.
  • 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 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.
  • 7 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
  • 8 Geometry constant for Lubrication Life Adjustment Factor a3l.