Cuscinetti volano

The flywheel bearing, often called the pilot or spigot bearing, sits in the centre of the flywheel or crankshaft. Its job is to support and align the tip of the gearbox input shaft so the shaft turns smoothly and stays centred as the clutch engages and disengages.

When the clutch is disengaged, the engine and flywheel keep turning while the gearbox input shaft slows or stops. The pilot bearing supports the end of that input shaft and lets it turn independently of the flywheel, keeping the shaft aligned for smooth, precise clutch engagement and gear changes.

A worn pilot bearing feels rough or notchy when turned by hand and can cause noise, vibration, or difficulty shifting, especially with the clutch pressed. Because reaching it requires removing the gearbox, it is commonly replaced whenever the clutch is replaced, regardless of its apparent condition, to avoid repeating the labour.

The correct bearing depends on the engine, flywheel, and gearbox input shaft. Confirm the part against the vehicle specification before fitting, and replace it together with the clutch where access allows.