LiftMaster Sprocket Kit, 42 Tooth, 1.25″X1/4″K | LIF-71-1550B42QGH
71-1550B42QGH is a 42 Tooth Sprocket Kit (1.25″ Bore x 1/4″ Keyway), for 50 chain. For use as a door sprocket and compatible with LiftMaster® MAXUM Standard and Extended Duty JDC/JHDC, and Logic 4.0/5.0 Commercial Door Operators.
Kit includes shaft key.
Genuine LiftMaster® replacement part.