If you've been wondering, "Where can I buy a 009145 rear idler sprocket," your worries are over. NorthShoreCommercialDoor.com carries a large line of garage door sprockets, including the Allstar 009145 Garage Door Opener Rear Idler Sprocket. You can get it here fast and at a very competitive price.
QUESTION: I have an Allister Type IIA and I need to replace the sprocket that is located above the door. Is this it? by Roger M 7/14/2014
ANSWER: yes, looks like replacement part I ordered and used however it is for an Allstar opener not Allister if that is a concern. Also, this is a plastic replacement part but it replaces the plastic OEM sprocket that was on it. Other respondents are correct about measuring shaft diameter and sprocket tip to tip diameter before purchasing replacement so you know what you're getting is not incorrect by Rick C a
ANSWER: Hi:<br /><br />I ordered two sprockets and while the service man was here I had him replace both - one on top of the motor and the other at the other end where the door opens. I am thinking of getting two more to have some spare ones in case I need one in future.<br /><br />Yes this is what you need for ALLISTER TYPE II dual control garage door opener. by Kirit P a
QUESTION: this looks like my idler sprocket, what is the shaft hole size and outside dimension of the sprocket? by None N 12/11/2012
ANSWER: Looks like it is 5/8" in diameter....I will tell you it is pretty much the only sprocket with teeth. It is more than likely what they need. by S T a
ANSWER: The shaft hole size is 5/8" and the outside dimensions is 2 5/8" sprocket tip to tip. Be careful, know the diameter of shaft because some models openers had 1/2" shafts on which the rear idler fits. by S R a