The Timken Company
The Timken Company
4500 Mt Pleasant St. NW
N. Canton, OH 44720
Phone: (234) 262-3000
E-Mail: CustomerCAD@timken.com • Web site: www.timken.com
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Spherical bearings are designed to manage high radial loads even when misalignment, poor lubrication, contamination, extreme speeds or critical application stresses are present.
Unit of Measure

Specifications

Design Unit

 N/A Metric

d - Bore

 N/A 800 mm

Cage Type

 N/A YMB

Cage Material

 N/A Brass

Dimensions

D - Outer Diameter

 N/A 1280 mm50.394 in

B' - Inner Ring Width

 N/A 375 mm14.764 in

B - Outer Ring Width

 N/A 375 mm14.7640 in

Abutment and Fillet Dimensions

R - Inner Ring "To Clear" Radius1 N/A 7 mm0.280 in
r - Outer Ring "To Clear" Radius2 N/A 7 mm0.280 in

da - Inner Ring Backing Diameter

 N/A 905.000 mm35.600 in

Da - Outer Ring Backing Diameter

 N/A 1172.000 mm46.000 in

Basic Load Ratings

C0 - Static Radial Rating

 N/A 31400000 N7060000 lbf

C1(2) - Dynamic Radial Rating (Two-Rows)

 N/A 16600000 N3730000 lbf

Factors

e - ISO Factor3 N/A 0.28
Y0 - ISO Factor4 N/A 2.4
Y1 - ISO Factor5 N/A 2.45
Y2 - ISO Factor6 N/A 3.65

Reference Thermal Speed Rating (Grease)

 N/A 170 rpm
Reference Thermal Speed Rating (Oil)7 N/A 180 rpm
Cg - Geometry Factor8 N/A 0.136
  • 1 Maximum housing fillet radius that bearing corners will clear.
  • 2 Maximum shaft fillet radius that bearing corners will clear.
  • 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. See engineering
  • 5 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 6 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 7 See thermal speed ratings in the engineering section.
  • 8 Geometry constant for Lubrication Life Adjustment Factor a3l.