Commercial Rolling Steel Door Manual Hoist | Jackshaft Mount | Complete 4:1 Reduction Kit

Upgrade or replace the manual operating system on a commercial rolling steel door with this Rolling Door Chain Hoist, featuring a 4:1 reduction ratio, 1" bore, and 26 ft hand chain.

Designed for compatible rolling and coiling steel doors with a 1" shaft, the reduced-drive system helps decrease the effort required to manually raise and lower the door while providing smooth, controlled operation.

The kit includes the primary sprocket, chain, mounting, and shaft hardware required for a convenient replacement or new installation.

Key Features

• Heavy-duty commercial rolling door chain hoist

• 4:1 reduction ratio

• 1" bore

• Designed for compatible 1" door shafts

• Jackshaft-mounted configuration

• Includes 26 ft hand chain

• Smooth, controlled manual door operation

• Reduces operator effort compared with direct manual operation

• Heavy-duty commercial construction

• Complete mounting and shaft hardware package

• Ideal for rolling and coiling steel doors

• Suitable for replacement, repair, and new installations

• Current CDW SKU: H-4-1-15-1

4:1 Reduction Ratio

The hoist uses a:

4:1 Gear Reduction

This mechanical reduction provides increased leverage when manually operating a rolling steel door.

Benefits include:

• Reduced pulling effort

• More controlled door movement

• Easier operation of larger commercial doors

• Better leverage during opening and closing

• Smooth manual operation

Comparable commercial rolling-door hoists also use a 4:1 reduced-drive configuration for 1" shafts.

1" Bore

Bore Size: 1"

The hoist is designed for compatible rolling door systems using a 1" shaft.

Before ordering, measure the existing shaft carefully and confirm:

• Shaft diameter

• Keyway size

• Existing mounting arrangement

• Available clearance

• Existing sprocket configuration

Jackshaft Mount

This chain hoist is configured for jackshaft installation on compatible commercial rolling steel doors.

The drive system transfers manual hand-chain movement through the hoist and sprocket assembly to operate the rolling door shaft.

Proper shaft alignment is critical for dependable operation.

26 ft Hand Chain

The kit includes:

26 Feet of Hand Chain

This provides a convenient manual operating loop for many standard commercial rolling-door installations.

For unusually tall installations, verify that the supplied chain length provides the required operating height before installation.

Included Components

The current CDW package includes:

• (1) 4:1 Ratio Chain Hoist

• (1) Drive Sprocket

• 26 ft Hand Chain

• (1) Chain Keeper

• (2) Shaft Collars

• (1) Wall-Mount Bracket

• (1) 1/4" Shaft Key

Chain Keeper

The included chain keeper provides a convenient location to secure the hand chain when the door is not being operated.

This helps:

• Keep the chain organized

• Reduce loose chain around the opening

• Improve loading-area housekeeping

• Keep the operating chain accessible

1/4" Shaft Key

The kit includes a:

1/4" Shaft Key

The key engages the compatible keyed shaft and sprocket assembly to transmit rotational force without allowing the sprocket to spin independently on the shaft.

Product Specifications

Product Type: Manual Rolling Door Chain Hoist
CDW SKU: H-4-1-15-1
Gear Ratio: 4:1
Bore Size: 1"
Shaft Compatibility: 1"
Mounting: Jackshaft
Hand Chain Length: 26 ft
Shaft Key: 1/4"
Application: Commercial Rolling / Coiling Steel Doors
Operation: Manual
Use: Replacement / Repair / New Installation

Common Applications

Ideal for:

• Rolling steel doors

• Rolling service doors

• Commercial roll-up doors

• Warehouse doors

• Loading dock doors

• Industrial doors

• Service bays

• Storage facilities

• Manufacturing facilities

• Commercial garages

• Agricultural buildings

• Industrial plants

Replacement Applications

Use this chain hoist when the existing manual operator is:

• Worn

• Damaged

• Binding

• Difficult to operate

• Missing components

• Producing excessive chain or gear play

• Being upgraded from a less efficient manual system

Before replacing the hoist, inspect the complete rolling door system.

Inspect the Door Before Installation

A chain hoist should not be used to compensate for a poorly balanced or damaged rolling door.

Inspect:

• Counterbalance springs

• Barrel assembly

• Door shaft

• Bearings

• Curtain

• Slats

• End locks

• Guides

• Bottom bar

• Sprockets

• Roller chain

The door should be properly balanced and mechanically sound before the new operator is installed.

Important Compatibility Note

Before ordering, verify:

• 1" shaft diameter

• Existing shaft keyway

• 4:1 reduction requirement

• Mounting configuration

• Available side clearance

• Door balance

• Existing sprocket arrangement

• Required hand-chain length

Rolling steel doors can use different shaft diameters, sprocket arrangements, and mounting styles. Do not select a chain hoist based solely on appearance.

Installation Notes

Proper installation requires:

1. Confirming the door is balanced.

2. Verifying the 1" shaft and keyway.

3. Mounting the hoist securely.

4. Aligning the sprocket and drive components.

5. Installing and tensioning the chain correctly.

6. Installing the shaft collars and key.

7. Mounting the hand-chain keeper.

8. Cycling the door through its full travel.

9. Confirming smooth opening and closing.

Misalignment can cause premature wear to sprockets, chains, bearings, and the rolling door shaft.

What's Included

(1) Complete Rolling Door Chain Hoist Kit

Includes:

• 4:1 chain hoist

• Drive sprocket

• 26 ft hand chain

• Chain keeper

• Two shaft collars

• Wall-mount bracket

• 1/4" shaft key