LiftMaster #50 Chain 50-Tooth Sprocket – 1-1/4" Bore, 1/4" Keyway

The LiftMaster #50 Chain 50-Tooth Sprocket is designed for commercial door operator applications requiring a 50-tooth driven sprocket with a 1-1/4" bore and 1/4" keyway.

This sprocket is used with LiftMaster MAXUM JDC and JHDC commercial door operators and is designed for #50 roller chain drive systems. The keyed 1-1/4" bore provides a positive connection to the shaft for reliable torque transfer in commercial overhead door applications.

Specifications

• Brand: LiftMaster

• Sprocket Type: Commercial Operator / Door Sprocket

• Chain Size: #50 Roller Chain

• Tooth Count: 50 Teeth

• Bore Diameter: 1-1/4"

• Keyway: 1/4"

• Application: Commercial overhead door operator systems

• Compatible Operator Series: LiftMaster MAXUM JDC and JHDC

Compatibility

Sprocket selection is critical to proper door speed and operator performance. Before ordering, verify the required:

• Chain size

• Tooth count

• Shaft diameter

• Keyway size

• LiftMaster operator model

• Door configuration

Different sprocket tooth counts and bore sizes are available for MAXUM commercial operator installations. A sprocket that looks similar may produce a different operating speed or may not fit the shaft.

Professional Installation Recommended

Commercial door operator and sprocket systems can involve heavy doors, moving chains, shafts, and high-torque components. Installation and replacement should be performed by a qualified commercial door technician.

If you are unsure whether this 50-tooth, 1-1/4" bore sprocket is correct for your LiftMaster operator, contact Garage-DoorParts.com with your operator model, door type, existing sprocket dimensions, and photos before ordering.