KOYO – Tapered Roller Bearings

KOYO – Tapered Roller Bearings explains single‑, double‑ and four‑row TRB designs for gearboxes, hubs and rolling equipment. Topics include setting/preload, spacer arrangements, frictional torque vs. speed and oil selection. Worked examples link equivalent dynamic load to L10 life and ISO fits for shaft and housing seats.

Content overview

• Single, double and four‑row TRB families and cages.
• Setting/preload methods and spacer arrangements.
• Frictional torque vs. speed; oil selection and cooling.
• Rating life, fits and mounting tolerances.

How to use

1. Define radial/axial loads and duty cycle.
2. Select series and bearing arrangement (back‑to‑back/face‑to‑face).
3. Calculate setting/preload and choose fits.
4. Verify temperature rise and run‑in behavior.

Best practices

• Do not mix used/new components in paired sets.
• Measure end‑play with dial indicator after mounting.
• Use clean oil, proper filtration and break‑in cycles.
• Re‑torque housings after thermal stabilization.