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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 Quadruplex

Design Units

 N/A Metric

d - Bore

 N/A 105 mm

Ball Type

 N/A Ceramic

Cage Type

 N/A CR - Phenolic Outer Land Riding Cage

Precision Rating

 N/A ISO P4S (ABEC 7/9)

Manufacturing Part Number

 N/A 3MMC9121WI QUH

World Part Number

 N/A C7021E-T-P4S-QUH

Dimensions

D - Outer Diameter

 N/A 160 mm6.2992 in

Bearing Width

 N/A 26 mm1.0236 in

Total Width

 N/A 104 mm4.0944 in

Contact Angle

 N/A 25 º

Basic Load Ratings

C0 - Static Radial Rating (per row)

 N/A 75205 N16910 lbf
Ce - Dynamic Radial Rating (per row)1 N/A 92100 N20700 lbf

C1 ISO - Dynamic Radial Rating (per row)

 N/A 84000 N18900 lbf

Factors

Limiting Speed (Grease) (per row)

 N/A 8520 rpm

Limiting Speed (Oil)

 N/A 17040 rpm

Abutment and Fillet Dimensions

R - Inner Ring "To Clear" Radius2 N/A 2 mm0.079 in
r - Outer Ring "To Clear" Radius3 N/A 2 mm0.079 in

da - Inner Ring Backing Diameter

 N/A 115.7 mm4.560 in

Da - Outer Ring Backing Diameter

 N/A 150 mm5.910 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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