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
33010 50 80 24 24 19 - 0.45
33011 55 90 27 27 21 - 0.67
33012 60 95 27 27 21 - 0.71
33013 65 100 27 27 21 - 0.78
33014 70 110 31 31 25.5 - 1.1
33015 75 115 31 31 25.5 - 1.15
33016 80 125 36 36 29.5 - 1.65
33017 85 130 36 36 29.5 - 1.75
33018 90 140 39 39 32.5 - 2.2
33019 95 145 39 39 32.5 - 2.3
33020 100 150 39 39 32.5 - 2.4
33021 105 160 43 43 34 - 3.05
33022 110 170 47 47 37 - 3.85
33024 120 180 48 48 38 - 4.2
33109 45 80 26 26 20.5 - 0.56
33110 50 85 26 26 20 - 0.59
33111 55 95 30 30 23 - 0.86
33112 60 100 30 30 23 - 0.92
33113 65 110 34 34 26.5 - 1.3
33114 70 120 37 37 29 - 1.7