Hitachi 6684663 Spare Part - Clutch Drum Comp.

Original Hitachi clutch drum — part no. 6684663 — 240PF-style clutch drum engineered for petrol brushcutters and trimmers; a direct replacement component that restores reliable clutch engagement and power transfer.

Made from hardened, precision-machined steel with a finished bore for smooth engagement with the clutch shoes, this drum works with the clutch plate/spring stack and the stopping ring (stop ring C12 / part 6684664) found on the same assemblies — designed to resist wear from repeated engagement and outdoor use.

Example compatible models include Hitachi CG24EASP, CG24EKSL and CG27EASP — these are representative fitments for this clutch drum when servicing small petrol trimmers and brushcutters. If you’re looking through power tool parts to fix a worn clutch the 6684663 is the replacement drum used across those lineups.

Straightforward to install in the clutch assembly (fits into the flywheel/clutch shoe arrangement without modification), this original Hitachi drum is a practical swap when the existing drum shows scoring, ovalization, or glazing that causes slipping.