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
32222 110 200 56 53 46 - 7.1
32224 120 215 62 58 50 - 9.15
32226 130 230 68 64 54 - 11.5
32228 140 250 72 68 58 - 14.5
32230 150 270 77 73 60 - 17.8
32305 25 62 25 24 20 - 0.36
32306 30 72 29 27 23 - 0.55
32307 35 80 33 31 25 - 0.73
32308 40 90 35 33 27 - 1
32309 45 100 38 36 30 - 1.35
32310 50 110 42 40 33 - 1.8
32311 55 120 46 43 35 - 2.3
32312 60 130 49 46 37 - 2.85
32313 65 140 51 48 39 - 3.35
32314 70 150 54 51 42 - 4.3
32315 75 160 58 55 45 - 5.2
32316 80 170 62 58 48 - 6.2
32317 85 180 64 60 49 - 6.85
32924 120 165 29 27 23 - 1.62
33005 25 47 17 17 14 - 0.13