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Timken® angular contact ball bearings are designed for combination radial and axial loading. Single-row bearings have high thrust capacity in one direction. Some single-row bearings are specifically designed for duplex mounting in sets for maximum performance.
Unit of Measure

Specifications

Rows per Set

 N/A Triplex

Design Units

 N/A Metric

d - Bore

 N/A 17 mm

Ball Type

 N/A STEEL

Cage Type

 N/A CR - Phenolic Outer Land Riding Cage

Manufacturing Part Number

 N/A 2MM9303WI TUM

World Part Number

 N/A 71903C-T-P4S-TUM

Dimensions

D - Outer Diameter

 N/A 30 mm1.1811 in

Bearing Width

 N/A 7 mm0.2756 in

Total Width

 N/A 21 mm0.8268 in

Contact Angle

 N/A 15 º

Basic Load Ratings

C0 - Static Radial Rating (per row)

 N/A 2800 N630 lbf
Ce - Dynamic Radial Rating (per row)1 N/A 4970 N1120 lbf

C1 ISO - Dynamic Radial Rating (per row)

 N/A 4520 N1020 lbf

Factors

Limiting Speed (Grease) (per row)

 N/A 50100 rpm

Limiting Speed (Oil)

 N/A 100200 rpm

Abutment and Fillet Dimensions

R - Inner Ring "To Clear" Radius2 N/A 0.3 mm0.012 in
r - Outer Ring "To Clear" Radius3 N/A 0.3 mm0.012 in

da - Inner Ring Backing Diameter

 N/A 20.0 mm0.790 in

Da - Outer Ring Backing Diameter

 N/A 27.5 mm1.080 in
  • 1 Based on 106 revolutions of calculated fatigue life.
  • 2 Maximum housing fillet radius that bearing corners will clear.
  • 3 Maximum shaft fillet radius that bearing corners will clear.
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