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 140.000 210.000 45.000 45.000 34.000 - 5.250
32030 150.000 225.000 48.000 48.000 36.000 - 6.350
32204 20.000 47.000 19.250 18.000 15.000 - 0.160
32205 25.000 52.000 19.250 18.000 15.000 - 0.193
32206 30.000 62.000 21.250 20.000 17.000 - 0.280
32207 35.000 72.000 24.250 23.000 19.000 - 0.430
32208 40.000 80.000 24.750 23.000 19.000 - 0.530
32209 45.000 85.000 24.750 23.000 19.000 - 0.580
32210 50.000 90.000 24.750 23.000 19.000 - 0.610
32211 55.000 100.000 26.750 25.000 21.000 - 0.870
32212 60.000 110.000 29.750 28.000 24.000 - 1.150
32213 65.000 120.000 32.750 31.000 27.000 - 1.500
32214 70.000 125.000 33.250 31.000 27.000 - 1.600
32215 75.000 130.000 33.250 31.000 27.000 - 1.700
32216 80.000 140.000 35.250 33.000 28.000 - 2.050
32217 85.000 150.000 38.500 36.000 30.000 - 2.600
32218 90.000 160.000 42.500 40.000 34.000 - 3.350
32219 95.000 170.000 45.500 43.000 37.000 - 4.050
32220 100.000 180.000 49.000 46.000 39.000 - 4.900
32221 105.000 190.000 53.000 50.000 43.000 - 6.000