The chain wraps around this sprocket as well as the gear and sprocket at the motor.
Garage door opener sprocket broke off.
A new front sprocket costs about 150 200 include the labor to install it.
First we will address fixing the broken piece of metal.
Chain driven garage door openers should have some slack in the chain for optimal performance.
Over time the sprocket s teeth can wear and the chain may jump or skip when the opener raises the door.
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Over time though this slack can increase or the gear and sprocket assembly can wear and the chain may pop off the sprockets.
Operator brackets come in different styles some are.
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If you are not confident in your ability to diagnose the problem call a local garage door service company.
Sprocket is at the end of the opener rail closest to the garage door opening.
Chain drive garage door openers have a sprocket that is attached at the top of the motor.