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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 440 mm

Cage Type

 N/A YMB

Cage Material

 N/A Brass

Dimensions

D - Outer Diameter

 N/A 720 mm28.3470 in

B' - Inner Ring Width

 N/A 280 mm11.024 in

B - Outer Ring Width

 N/A 280 mm11.0240 in

Abutment and Fillet Dimensions

R - Inner Ring "To Clear" Radius1 N/A 5 mm0.200 in
r - Outer Ring "To Clear" Radius2 N/A 5 mm0.2 in

da - Inner Ring Backing Diameter

 N/A 495.000 mm19.500 in

Da - Outer Ring Backing Diameter

 N/A 656 mm25.8000 in

Basic Load Ratings

C0 - Static Radial Rating

 N/A 12900000 N2900000 lbf

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

 N/A 7120000 N1600000 lbf

Factors

e - ISO Factor3 N/A 0.36
Y0 - ISO Factor4 N/A 1.84
Y1 - ISO Factor5 N/A 1.88
Y2 - ISO Factor6 N/A 2.79

Reference Thermal Speed Rating (Grease)

 N/A 250 rpm
Reference Thermal Speed Rating (Oil)7 N/A 260 rpm
Cg - Geometry Factor8 N/A 0.0983
  • 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.
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