Chain spreader for installation with 1" operator shaft and 1-1/4" door shaft
Designed to keep tension on the chain when used with a wall mount commercial operator. It helps avoid premature wear on the door shaft bearing and commercial operator output shaft bearing
Gear and sprocket assembly for belt drive units after 2002.
Assembly includes: Spring washer thrust washer retaining ring bearing plate two roll pins drive gear and worm gear helical gear with retainer and grease.