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
32028 140 210 45 45 34 - 5.25
32030 150 225 48 48 36 - 6.35
32204 20 47 19 18 15 - 0.16
32205 25 52 19 18 15 - 0.19
32206 30 62 21 20 17 - 0.28
32207 35 72 24 23 19 - 0.43
32208 40 80 25 23 19 - 0.53
32209 45 85 25 23 19 - 0.58
32210 50 90 25 23 19 - 0.61
32211 55 100 27 25 21 - 0.87
32212 60 110 30 28 24 - 1.15
32213 65 120 33 31 27 - 1.5
32214 70 125 33 31 27 - 1.6
32215 75 130 33 31 27 - 1.7
32216 80 140 35 33 28 - 2.05
32217 85 150 39 36 30 - 2.6
32218 90 160 43 40 34 - 3.35
32219 95 170 46 43 37 - 4.05
32220 100 180 49 46 39 - 4.9
32221 105 190 53 50 43 - 6