Tapered roller bearing are bearing that can take large axial force
as well as being able to sustain large radial forces.
The inner and outer ring raceways are segments of cones and the
rollers are also made with a taper so that the conical surface 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 large 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 and no differential scrubbing occurs. When a
roller slides rather than rolls, it can generate wear at the
roller-to-race interface. The difference 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 large the half angles of these cones the large 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.
The model:
31306X2A/P6 31307 320/28 320/28/YB2 32005 32006 32006/P6XYB5 32007
32008 32008X1WC 32204 32205/P6X 32206/YA8 32207/P5 32207/YA8
332307.01 32307/HAP6X 32307A/HAP5
