Located at the top of the motor unit the gear and sprocket assembly drives the chain that opens and closes the garage door.
How to replace chain drive garage door opener.
Screw drives a long threaded rod drives a mechanism that opens and closes the door are priced in the mid range.
This diy repair guide explains how to replace the gear and sprocket assembly on a chain drive garage door opener.
This diy repair guide explains how to replace the drive and worm gears on a chain drive garage door opener.
If the gears break or strip the door won t move.
The worm gear which attaches to the motor shaft meshes with the drive gear to spin the sprocket and drive the chain to open and close the garage door.
Garage door openers are available with a chain drive screw drive or belt drive.
This garage door opener works by moving gears and metal parts together.
These are widely used since they are affordable and easily available.
Chain drives a long chain pulls the door open and closed are the least expensive but they re loud.
If the gear and sprocket assembly breaks the motor runs but the door won t move.