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
LM 603049/603011 45.242 77.788 19.842 19.842 15.080 - 0.370
LM 603049/603011 1.781 3.063 0.781 0.781 0.594 - 0.370
LM 603049/603012 45.242 77.788 21.430 19.842 16.667 - 0.390
LM 603049/603012 1.781 3.063 0.844 0.781 0.656 - 0.390
LM 67048/67010 31.750 59.131 15.875 16.764 11.811 - 0.180
LM 67048/67010 1.250 2.328 0.625 0.660 0.465 - 0.180
M 12649/12610 21.430 50.005 17.526 18.288 13.970 - 0.170
M 12649/12610 0.844 1.969 0.690 0.720 0.550 - 0.170
M 802048/802011 41.275 82.550 26.543 25.654 20.193 - 0.620
M 802048/802011 1.625 3.250 1.045 1.010 0.795 - 0.620
M 84548/84510 25.400 57.150 19.431 19.431 14.732 - 0.240
M 84548/84510 1.000 2.250 0.765 0.765 0.580 - 0.240
M 86649/86610 36.162 64.292 24.432 21.433 16.670 - 0.330
M 86649/86610 1.188 2.531 0.962 0.844 0.658 - 0.330
M 88046/88010 31.750 68.262 22.225 22.225 17.462 - 0.400
M 88046/88010 1.250 2.688 0.875 0.875 0.688 - 0.400
M 88048/88010 33.338 68.262 22.225 22.225 17.462 - 0.380
M 88048/88010 1.313 2.688 0.875 0.875 0.688 - 0.380
U497/U460L 44.987 79.975 24.000 26.000 22.000 - 0.480
U497/U460L 1.771 3.149 0.945 1.024 0.866 - 0.480