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 35 12 11 10 - 0.05
30203 17 40 13 12 11 - 0.07
30204 20 47 15 14 12 - 0.12
30205 25 52 16 15 13 - 0.15
30206 30 62 17 16 14 - 0.23
30207 35 72 18 17 15 - 0.32
30208 40 80 20 18 16 - 0.42
30209 45 85 21 19 16 - 0.48
30210 50 90 22 20 17 - 0.54
30211 55 100 23 21 18 - 0.7
30212 60 110 24 22 19 - 0.88
30213 65 120 25 23 20 - 1.15
30214 70 125 26 24 21 - 1.25
30215 75 130 27 25 22 - 1.4
30216 80 140 28 26 22 - 1.6
30217 85 150 31 28 24 - 2.05
30218 90 160 33 30 26 - 2.55
30219 95 170 35 32 27 - 3
30220 100 180 37 34 29 - 3.65
30221 105 190 39 36 30 - 4.25