Liftmaster 41c4220a Gear and Sprocket Kit for Chamberlain, Sears, Craftsman and LiftMaster 1/3 and 1/2 HP Chain Drive Models

Really cheap fix it yourself kit and very very easy to install !

It worked for LiftMaster 1/3HP 41A5021-1H-315

It was everything I expected we have been using it for a month now and its working perfectly. Insted of calling the repair man, which would of costed us in the $200+ range, I just bought it myself and did all of the work with ease...it all fit like expected, they sent greese with it and some extra gearings that I didnt need now but might in the future...its always good to have extra. All in all it was a perfect product and I hope it wont break like the original one did...

Worked great!

Good parts that came on time and fit the 1/2hp Liftmaster. Be sure to line up the slots in the galvanized cap under the sprocket so that the plastic cover can be attached and clear the chain.

This fixed my garage door opener and the instructions explained the procedure pretty well. Multiple youtube videos available on how to replace these gears on the garage door opener

I used this to fix a broken gear on my craftsman opener model 139.53975SRT1. The parts fit well and was fairly easy to put together. I replaced all the gears, bushings etc in about an hour. One thing to pay attention to if you replace the worm gear, note how the washers go on the motor shaft as the directions are not clear.

easy to replace. Good as new.

good stuff. Recommend it

To fix my garage door