Chain Hoist for Rolling Door

JR-RD Chain Hoist for Dead Axle Rolling Doors

Eliminate the hassle of finding a reliable chain hoist with the JR-RD, a durable galvanized steel manual door operator designed for dead axle rolling doors. Built for shaft and wall-mounted installations, this chain hoist comes equipped with all necessary components for a smooth, quick install. With a 1-5/16" bore and 4:1 reduction ratio, it delivers dependable mechanical performance for commercial and industrial door systems.

Product Highlights

• Item Number: 9-8-11N

• Material: Galvanized steel body

• Mount Style: Shaft or wall mount

• Reduction Ratio: 4:1

• Bore Size: 1-5/16" (standard)

Carton Contents

• Chain Hoist Body

• 26 feet of hand chain

• 41B40 mounted sprocket

• 23 inches of 41 series chain

Installation Notes

Shaft Mounted Units (JR-ST, JR-RD, JRG):

• Mount directly onto the door shaft.

• Align small 9-tooth sprocket with the door-mounted sprocket.

• Secure with set screws, shaft collars, and keys as needed.

• Connect roller chain using provided connector link.

• Optionally install wall bracket to reduce swing.

All Installations:

• Loop hand chain around the pocket wheel (additional chain may be required for doors over 14 ft. or with high lift configurations).

• Adjust chain to hang approx. 12" from the floor.

• Use pliers to close the loop link securely.

• Install the chain keeper to keep chain clear of the opening.

• Sprocket spacing: 3.897" (hole-to-hole) on a 4.5" bolt circle with each bushing on a 120º arc.