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 42350-90014 Tapered Roller Bearing Assemblies Normal Duty Setscrew Ball Bearing 205 Series Polymer
TIMKEN NA24776SW-902A2 Tapered Roller Bearing Assemblies Normal Duty Setscrew Ball Bearing 207 Series Cast Iron
TIMKEN NA285160-90040 Tapered Roller Bearing Assemblies Normal Duty Setscrew Ball Bearing 204 Series Cast Iron
TIMKEN 8578-90189 Tapered Roller Bearing Assemblies Normal Duty Setscrew Ball Bearing 207 Series Cast Iron
TIMKEN HH926749-942A7 Tapered Roller Bearing Assemblies Normal Duty Setscrew Ball Bearing 210 Series Cast Iron
TIMKEN NA24776SW-90086 Tapered Roller Bearing Assemblies Intermediate Duty Setscrew Ball Bearing 207 Series Zinc
TIMKEN NA24776SW-90075 Tapered Roller Bearing Assemblies Normal Duty Setscrew Ball Bearing 209 Series Cast Iron
TIMKEN NA24776SW-90069 Tapered Roller Bearing Assemblies Normal Duty Setscrew Ball Bearing 203 Series Zinc
TIMKEN NA24776SW-90053 Tapered Roller Bearing Assemblies Tapered Bore Open Double Row Symmetric
TIMKEN 8578-90185 Tapered Roller Bearing Assemblies Normal Duty Setscrew Ball Bearing 207 Series Cast Iron
TIMKEN 8578-90184 Tapered Roller Bearing Assemblies Normal Duty Setscrew Ball Bearing 203 Series Zinc
TIMKEN JRM4249-90UB9 Tapered Roller Bearing Assemblies Normal Duty Grip Tight Ball Bearing 207 Series Cast Iron
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