Replace the drive sprocket on your model 3950 commercial jackshaft door operator with the LiftMaster 41A7280 dead shaft sprocket kit from North Shore Commercial Door. The model 41A7280 LiftMaster sprocket kit is designed only for use with the LiftMaster 3950 jackshaft rolling door operator for light-duty commercial operations for doors without live shafts.
The drive sprocket mounts to the 3950 door operator. The pre-punched holes allow vertical adjustment of the sprocket to provide easier alignment of the drive and door sprockets. At North Shore Commercial Door, our trained staff can help you with compatibility or installation questions. Shop all our repair parts and accessories for the LiftMaster 3950 commercial rolling door operator.
For use with doors without live shafts
Only for use with LiftMaster 3950 jackshaft rolling door operator
Allows for vertical adjustment to easily align the drive and door sprockets