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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

Manufacturing Part Number

 N/A MM12BS32QUM

Rows per Set

 N/A Quadruplex

Design Units

 N/A Metric

d - Bore

 N/A 12 mm

Ball Type

 N/A STEEL

Cage Type

 N/A CR - Phenolic Outer Land Riding Cage

Dimensions

D - Outer Diameter

 N/A 1.2598 in32 mm

Bearing Width

 N/A 0.3937 in10 mm

Total Width

 N/A 1.5748 in40 mm

Contact Angle

 N/A 60 º

Basic Load Ratings

C0 - Static Radial Rating (per row)

 N/A 2600 lbf11400 N

Ce - Dynamic Radial Rating (per row)

 N/A 2140 lbf9500 N

C1 ISO - Dynamic Radial Rating (per row)

 N/A 1930 lbf8600 N

Factors

Limiting Speed (Grease) (per row)

 N/A 7300 rpm

Limiting Speed (Oil)

 N/A 14600 rpm

Abutment and Fillet Dimensions

R - Inner Ring "To Clear" Radius1 N/A 0.031 in0.8 mm
r - Outer Ring "To Clear" Radius2 N/A 0.031 in0.800 mm

da - Inner Ring Backing Diameter

 N/A 0.855 in21.717 mm

Da - Outer Ring Backing Diameter

 N/A 0.879 in22.327 mm
  • 1 Maximum housing fillet radius that bearing corners will clear.
  • 2 Maximum shaft fillet radius that bearing corners will clear.