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
30202 15.000 35.000 11.750 11.000 10.000 - 0.053
30203 17.000 40.000 13.250 12.000 11.000 - 0.075
30204 20.000 47.000 15.250 14.000 12.000 - 0.120
30205 25.000 52.000 16.250 15.000 13.000 - 0.150
30206 30.000 62.000 17.250 16.000 14.000 - 0.230
30207 35.000 72.000 18.250 17.000 15.000 - 0.320
30208 40.000 80.000 19.750 18.000 16.000 - 0.420
30209 45.000 85.000 20.750 19.000 16.000 - 0.480
30210 50.000 90.000 21.750 20.000 17.000 - 0.540
30211 55.000 100.000 22.750 21.000 18.000 - 0.700
30212 60.000 110.000 23.750 22.000 19.000 - 0.880
30213 65.000 120.000 24.750 23.000 20.000 - 1.150
30214 70.000 125.000 26.250 24.000 21.000 - 1.250
30215 75.000 130.000 27.250 25.000 22.000 - 1.400
30216 80.000 140.000 28.250 26.000 22.000 - 1.600
30217 85.000 150.000 30.500 28.000 24.000 - 2.050
30218 90.000 160.000 32.500 30.000 26.000 - 2.550
30219 95.000 170.000 34.500 32.000 27.000 - 3.000
30220 100.000 180.000 37.000 34.000 29.000 - 3.650
30221 105.000 190.000 39.000 36.000 30.000 - 4.250