41A7280 LiftMaster Dead Shaft Sprocket Kit for Model 3950

The LiftMaster 41A7280 Dead Shaft Sprocket Kit is a genuine replacement part designed exclusively for the LiftMaster 3950 commercial jackshaft rolling door operator. Built for light-duty commercial doors without live shafts, this sprocket kit ensures smooth, dependable operation and long-lasting performance.

The sprocket mounts directly to the 3950 operator, and its pre-punched holes allow vertical adjustment for precise alignment between the drive and door sprockets. This makes installation easier while maintaining proper functionality of your rolling door system.

Key Features

• Genuine LiftMaster sprocket replacement kit

• Part number: 41A7280

• Designed for the LiftMaster 3950 jackshaft rolling door operator

• For use on doors without live shafts

• Pre-punched mounting holes allow vertical adjustment for accurate sprocket alignment

• Heavy-duty construction for reliable commercial performance

Sprocket Bolt Patterns

• Inner Bolt Pattern: 3-15/16 in. hole-to-hole

• Outer Bolt Pattern: 4-9/16 in. hole-to-hole