Taper Roller Bearing
Product Specification

The inner and outer ring raceways are segments of cones and the rollers are also made with a taper 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 conical geometry is used as it gives a larger contact patch, which permits greater loads to be carried than with spherical (ball) bearings, while 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. When a roller slides rather than rolls, it can generate wear at the roller-to-race interface, i.e. the differences in surface speeds creates a scrubbing action. Wear will degenerate the close tolerances normally held in the bearing and can lead to other problems. Much closer to pure rolling can be achieved in a tapered roller bearing and this avoids rapid wear.

The rollers are guided by a flange on the inner ring. This stops the rollers from sliding out at high speed due to their momentum.

The larger the half angles of these cones the larger the axial force that the bearing can sustain.

Tapered roller bearings are separable and have the following components: outer ring, inner ring, and roller assembly (containing the rollers and a cage). The non-separable inner ring and roller assembly is called the cone, and the outer ring is called the cup. Internal clearance is established during mounting by the axial position of the cone relative to the cup.

Bearing No. d D T B C R Mass
33115 75.000 125.000 37.000 37.000 29.000 - 1.800
33116 80.000 130.000 37.000 37.000 29.000 - 1.900
33117 85.000 140.000 41.000 41.000 32.000 - 2.450
33118 90.000 150.000 45.000 45.000 35.000 - 3.100
33205 25.000 52.000 22.000 22.000 18.000 - 0.230
33206 30.000 62.000 25.000 25.000 19.500 - 0.370
33207 35.000 72.000 28.000 28.000 22.000 - 0.560
33208 40.000 80.000 32.000 32.000 25.000 - 0.770
33209 45.000 85.000 32.000 32.000 25.000 - 0.820
33210 50.000 90.000 32.000 32.000 24.500 - 0.900
33211 55.000 100.000 35.000 35.000 27.000 - 1.200
33212 60.000 110.000 38.000 38.000 29.000 - 1.547
33213 65.000 120.000 41.000 41.000 32.000 - 2.050
33214 70.000 125.000 41.000 41.000 32.000 - 2.100
33215 75.000 130.000 41.000 41.000 31.000 - 2.250
33216 80.000 140.000 46.000 46.000 35.000 - 2.900
33217 85.000 150.000 49.000 49.000 37.000 - 3.700
33218 90.000 160.000 55.000 55.000 42.000 - 4.492
02872/02820 28.575 73.025 22.225 22.225 17.462 - 0.480
02872/02820 1.125 2.875 0.875 0.875 0.688 - 0.480