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Tapered roller bearings
Tapered roller bearings, single and double row
The full catalogue holds 662 more items brought in to order.
Delivery in approx. 10 working days, full technical documentation. Available to business customers.
49–81 z 81
Tapered roller bearings
About this category
- Load
- high radial and axial at once, in one direction
- Arrangement
- always in pairs, back-to-back or face-to-face
- Adjustment
- clearance set during mounting — nut or shims
- Separability
- inner ring with cage separate from outer ring
Tapered roller bearings carry high radial and axial loads at the same time, but in one direction only — which is why they are mounted in pairs, in an O or X arrangement. Classic applications are wheel hubs, spindles, bevel gearboxes and anywhere the axial force is constant and significant.
They are separable: the cone with cage and rollers comes off the outer race. That eases mounting but requires setting clearance or preload when assembling — and that step causes most of the failures.
What to look at when selecting
- 01Choose the arrangement: O (wide base, stiff guidance) or X (shorter base, simpler assembly).
- 02Decide whether the assembly runs with clearance or with preload — preload adds stiffness but also heat.
- 03Account for thermal expansion of the shaft: too much preload when cold becomes seizure when hot.
- 04The cone and its outer race are a factory-matched set — never mix parts from different bearings.
Common questions
- How do I set clearance in tapered roller bearings?
- Usually with a nut or a shim pack: tighten until clearance disappears while watching the turning torque, then back off by the value given by the machine manufacturer. Verify with a dial gauge on the shaft, measuring axial movement.
- Do both bearings have to be replaced together?
- The cone and its matching outer race always go together — they are lapped as a pair at the factory. The second bearing in the assembly is replaced when it has run the same hours: a new one next to a worn one takes most of the load and fails quickly.