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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 280 mm

Cage Type

 N/A YMB

Cage Material

 N/A Brass

Dimensions

D - Outer Diameter

 N/A 420 mm16.535 in

B' - Inner Ring Width

 N/A 106 mm4.173 in

B - Outer Ring Width

 N/A 106 mm4.1730 in

Abutment and Fillet Dimensions

R - Inner Ring "To Clear" Radius1 N/A 3 mm0.120 in
r - Outer Ring "To Clear" Radius2 N/A 3 mm0.12 in

da - Inner Ring Backing Diameter

 N/A 309 mm12.2000 in

Da - Outer Ring Backing Diameter

 N/A 389 mm15.300 in

Basic Load Ratings

C0 - Static Radial Rating

 N/A 2810000 N631000 lbf

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

 N/A 1820000 N410000 lbf

Factors

e - ISO Factor3 N/A 0.23
Y0 - ISO Factor4 N/A 2.86
Y1 - ISO Factor5 N/A 2.92
Y2 - ISO Factor6 N/A 4.35

Reference Thermal Speed Rating (Grease)

 N/A 1100 rpm
Reference Thermal Speed Rating (Oil)7 N/A 1300 rpm
Cg - Geometry Factor8 N/A 0.1182
  • 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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