Tapered Roller Bearing Assemblies

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The inner and outer ring raceways are segments of cones and the rollers are tapered so that the conical surfaces of the raceways, and the roller axes, if projected, would all meet at a common point on the main axis of the bearing. This geometry makes the motion of the cones remain coaxial, with no sliding motion between the raceways and the OD of the rollers.

This conical geometry creates a linear contact patch which permits greater loads to be carried than with spherical (ball) bearings, which have point contact. The geometry means that the tangential speeds of the surfaces of each of the rollers are the same as their raceways along the whole length of the contact patch and no differential scrubbing occurs.

The rollers are stabilized and restrained by a flange on the inner ring, against which their large end slides, which stops the rollers from popping out due to the "pumpkin seed effect" of their conical shape.The larger the half angles of these cones the larger the axial force that the bearing can sustain.

Bearing Number Bore Dia Outer DIa Width Size
TIMKEN NA15117SW-90147 Tapered Roller Bearing Assemblies 315 Series Expansion 4 Bolt Flange Piston Ring
TIMKEN NA15117SW-90032 Tapered Roller Bearing Assemblies Normal Duty Setscrew Ball Bearing 204 Series Cast Iron
TIMKEN 375-50000/374-50000 Tapered Roller Bearing Assemblies Normal Duty Setscrew Ball Bearing 207 Series Cast Iron
TIMKEN 37425-90022 Tapered Roller Bearing Assemblies Normal Duty Setscrew Ball Bearing 204 Series Cast Iron
TIMKEN 37425-90019 Tapered Roller Bearing Assemblies Medium Duty Setscrew Ball Bearing 216 Series Ductile Iron
TIMKEN 9378-90011 Tapered Roller Bearing Assemblies Normal Duty Setscrew Ball Bearing 206 Series Cast Iron
TIMKEN 93787-902A9 Tapered Roller Bearing Assemblies Normal Duty Setscrew Ball Bearing 207 Series Cast Iron
TIMKEN 29585-902A3 Tapered Roller Bearing Assemblies Medium Duty Setscrew Ball Bearing 208 Series Cast Iron
TIMKEN 93787-90231 Tapered Roller Bearing Assemblies Normal Duty Setscrew Ball Bearing 204 Series Cast Iron
TIMKEN 93787-90206 Tapered Roller Bearing Assemblies Normal Duty Setscrew Ball Bearing 203 Series Cast Iron
TIMKEN 93787-90192 Tapered Roller Bearing Assemblies Normal Duty Setscrew Ball Bearing 209 Series Cast Iron
TIMKEN 74550-60000/74850B-60000 Tapered Roller Bearing Assemblies Normal Duty Grip Tight Ball Bearing 211 Series Cast Iron
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