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
33010 50.000 80.000 24.000 24.000 19.000 - 0.450
33011 55.000 90.000 27.000 27.000 21.000 - 0.670
33012 60.000 95.000 27.000 27.000 21.000 - 0.710
33013 65.000 100.000 27.000 27.000 21.000 - 0.780
33014 70.000 110.000 31.000 31.000 25.500 - 1.100
33015 75.000 115.000 31.000 31.000 25.500 - 1.150
33016 80.000 125.000 36.000 36.000 29.500 - 1.650
33017 85.000 130.000 36.000 36.000 29.500 - 1.750
33018 90.000 140.000 39.000 39.000 32.500 - 2.200
33019 95.000 145.000 39.000 39.000 32.500 - 2.300
33020 100.000 150.000 39.000 39.000 32.500 - 2.400
33021 105.000 160.000 43.000 43.000 34.000 - 3.050
33022 110.000 170.000 47.000 47.000 37.000 - 3.850
33024 120.000 180.000 48.000 48.000 38.000 - 4.200
33109 45.000 80.000 26.000 26.000 20.500 - 0.560
33110 50.000 85.000 26.000 26.000 20.000 - 0.590
33111 55.000 95.000 30.000 30.000 23.000 - 0.860
33112 60.000 100.000 30.000 30.000 23.000 - 0.920
33113 65.000 110.000 34.000 34.000 26.500 - 1.300
33114 70.000 120.000 37.000 37.000 29.000 - 1.700