Genuine Makita 221427-3 — Worm Gear (single unit). Precision-molded plastic worm gear designed to transmit torque from the motor to the drive assembly in compatible Makita chain saws, restoring smooth engagement and reliable drive operation.

This original Makita part is sold as one replacement worm gear and commonly fits models such as XCU02, XCU04 and US3551A.

Compact and straightforward to install, the 221427-3 is a direct-fit component that helps keep Makita parts performing to factory standards without extra modification.

A small, affordable item that’s useful when sourcing parts for power tools repairs — ideal if your chain saw’s drive feels sloppy or the chain feed isn’t engaging correctly.