Part information

Gear and sprocket assembly 41C4220A is an original equipment manufacturer (OEM) part that fits most Craftsman 139-series chain-drive garage door openers manufactured after 1993. Assembly also fits Chamberlain chain-drive garage door opener models 1240R, 1245R, 1246R, 1255R and 1256R.

Gear and sprocket assembly 41C4220A drives the chain that raises and lowers the garage door.

This gear and sprocket assembly includes the spring washer, thrust washer, retaining ring, bearing plate, 2 roll pins, drive gear, worm gear, helical gear with retainer and grease.