Long Bent Garage Door Shaft Key – 1/4" x 1/4" x 4"

This long bent shaft key is designed for compatible garage door torsion shafts, sprockets, couplers, drums, and other keyed shaft components requiring a 1/4" square key.

The 4-inch length provides additional engagement compared with shorter shaft keys, while the bent end makes the key easier to grip, position, install, and remove during service.

Product Features

• Long bent shaft key

• 1/4" × 1/4" square profile

• 4" usable length

• Approximately 30° bent end

• Bent section approximately 9/16" long

• Designed for compatible keyed garage door shafts

• Helps prevent rotational movement between shaft and keyed component

• Convenient bent end assists installation and removal

• Suitable for residential, commercial, and industrial door hardware

Specifications

• Product Type: Bent Shaft Key

• Part Number: 156515

• Width: 1/4"

• Height: 1/4"

• Usable Length: 4"

• Bend: Approximately 30°

• Bent End Length: Approximately 9/16"

• Profile: Square Key Stock

Common Applications

Suitable for compatible:

• Garage door torsion shafts

• Commercial door shafts

• Shaft couplers

• Chain sprockets

• Cable drum assemblies

• Operator drive components

• Mechanical shaft connections

• Other components using a 1/4" keyway

How a Shaft Key Works

A shaft key fits into matching keyways in both the shaft and the mounted component.

This mechanical connection allows torque to transfer between the shaft and the component while helping prevent the sprocket, coupler, drum, or other keyed part from rotating independently on the shaft.

Why Use a Bent Shaft Key?

The bent end provides a convenient gripping point that can make the key easier to:

• Position during assembly

• Remove during service

• Handle in confined shaft locations

• Identify after installation

The longer 4" design also provides additional usable engagement where a longer keyed connection is required.

Compatibility

Before ordering, verify:

• Shaft keyway width

• Component keyway width

• Required key length

• Available clearance

• Existing shaft-key dimensions

This key is designed for compatible 1/4" keyways.

Do not force an oversized key into a smaller or damaged keyway.

Package Contents

• 1 – Long Bent Shaft Key, 1/4" x 1/4" x 4"

Shaft, coupler, sprocket, cable drum, bearings, and other hardware are sold separately.

Important Installation Note

Disconnect operator power and properly secure the garage door before servicing torsion shafts, sprockets, drums, or other rotating components.

Inspect both the shaft keyway and mating component for wear or damage before installing a replacement key.