Drive Gear 81B0045 for Liftmaster Chamberlain Craftsman Sears Garage Door Opener 41A2817 41C4220A

Innenbohrungen ist nicht 12,7 mm sondern 13,00 mm und der Maß zwischen den Spannstiften ist zu klein

This original piece failed (deteriorated) in my old Liftmaster and this replacement part fit perfectly.

was a perfect match for the gear that had sheared off in the garage door opener, replaced it and now it works perfectly like a new opener was installed!

Fit perfectly on my 1999 Craftsman belt drive unit. Drove the roll pin out, slid off the old gear, slipped on the new gear and reinstalled the roll pin with my vise and Fit perfectly in my 1999 Craftsman belt drive unit. Removed the sprocket assembly, drove the roll pin out, slipped off the old gear, slipped on the new gear, squeezed and drove the roll pin back in. Reinstalled the sprocket assembly. 30 minutes. Spent more time on everything else besides the gear replacement. That’s the easiest part. Glad I found this part. I’m ordering a spare to have on hand for my other identical unit.

This gear worked in my opener like the original. It took a few hours to determine how to replace the gear (quite easy once the cover was off) but it saved me close to $800 for a new opener.