Most openers use an operator rail to raise the garage door. The opener causes a few gears to turn, which turns a sprocket. This sprocket contains a belt or chain which runs along the length of the operator rail. The trolley connects to the chain or belt, which connects to the drawbar arm. As the chain pulls on the trolley, the garage door opens.
If the grease drys up off the gears, your gears will wear out. You can know this has happened when you see plastic shavings inside your opener. Another cause for worn opener gears is an improperly balanced garage door. If the springs are too weak or you continue to operate the door with a broken spring, you can wear out the gears in your opener.
Use the links below to see gears and sprockets from specific manufacturers. You can also see other parts for operators or garage doors in the links on the right.
IMPORTANT NOTE REGARDING LOCAL PICKUPS: DDM is considered a life-sustaining company because we are an internet retail company that provides essential products. Due to the recent outbreak of Coronavirus, however, we are changing our local order pickup policy at our West Chicago location. To pick up an order you will need to order first. The quickest way is to order in advance through our online shopping cart. There you can select the local pickup option. Or, you can call 630-293-1337 for assistance, to confirm availability of parts, and to place your order. Once ordered, your parts will be available for pickup in the lobby of our north side front entrance. Longer items will be picked up on the south side loading dock. Please honor the six foot social distancing rule. Thank you for your patience and understanding as we all navigate this challenge together. More information is available on our blog titled DDM Adjusts to the COVID-19 Coronavirus. In the same article you will also find documentation and an answer to the question: "Is a garage door repair company a life sustaining business?"