Makita 221427-3 Replacement Worm Screw

Makita 221427-3
is the genuine Makita worm gear for chainsaws and power saws.
A worm gear is a gear with a spiral thread that meshes with and drives the cylindrical gear. An electric motor powers the worm gear. This power allows the gear to rotate against the gear wheel. If you suspect this component is broken or worn out, you will need to replace it with this replacement part.

The worm gear is sold individually.