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
HM 89446/89410 35 76 29 28.57 23.02 - 0.66
HM 89446/89410 1 3 1 1.125 0.906 - 0.66
HM 89448/89410 37 76 29 28.57 23.02 - 0.62
HM 89448/89410 1 3 1 1.125 0.906 - 0.62
HM 903249/903210 44 95 31 28.57 22.22 - 1
HM 903249/903210 2 4 1 1.125 0.875 - 1
HM 926740/926710 114 229 54 49.42 38.1 - 9.59
HM 926740/926710 5 9 2 1.946 1.5 - 9.59
JHM 511946/511910 65 110 28 28 22.5 - 1.05
JHM 511946/511910 3 4 1 1.102 0.886 - 1.05
JHM 515649/515610 80 130 35 34 28.5 - 1.68
JHM 515649/515610 3 5 1 1.339 1.122 - 1.68
JHM 522649/522610 110 180 47 46 38 - 4.65
JHM 522649/522610 4 7 2 1.811 1.496 - 4.65
JHM 716649/716610 85 130 30 29 24 - 1.4
JHM 716649/716610 3 5 1 1.142 0.945 - 1.4
JHM 718149/718110 90 145 35 34 27 - 2.14
JHM 718149/718110 4 6 1 1.339 1.063 - 2.14
JHM 720249/720210 100 160 41 40 32 - 3.05
JHM 720249/720210 4 6 2 1.575 1.26 - 3.05