How to find the right Garage Door Gears AI guide
Written by an AI model from its trained knowledge.
What the AI looks for in Garage Door Gears
- Exact opener compatibility
- Match the gear kit to your opener's brand, model and drive type (chain, belt or screw). Screw-drive and chain/belt gear kits are not interchangeable. Gear and sprocket dimensions are specific to each motor design.
- Correct diagnosis
- Replace the gear when the motor hums or runs but the trolley or chain does not move, and the door is not jammed and the spring is not broken. A broken spring or a binding door shows similar symptoms. A new gear will strip again if that cause is left in place.
- Complete kit
- Prefer kits that include the drive gear, worm gear and sprocket where applicable, plus the grease and any retaining pins. Worn mating parts and old grease shorten the life of a new gear.
Brands that matter
- Chamberlain / LiftMaster / Craftsman: OEM gear and sprocket kits cover many of their chain and belt drive openers.
- Genie: Sells OEM gear parts for its own drives, including screw-drive models.
What to avoid
- Kits sold as 'universal' without a model compatibility list
- Reusing old, hardened grease on a new gear
- Replacing the gear without checking why the old one stripped
Questions
Why does my opener run but the door doesn't move?
The most common cause is a stripped nylon drive gear. First check that the emergency release isn't pulled and that the spring isn't broken.