LiftMaster K80-5001 Shaft Key — 3/16 x 3/16 x 1-3/4 Inches

The LiftMaster K80-5001 is the shaft-key service item described in the supplied record and service listing with a 3/16-inch by 3/16-inch by 1-3/4-inch designation. Manufacturer catalogs shorten the description to keyway. This identifies a mechanical drive key, not a cabinet or access key. Match the exact shaft, hub and service drawing before ordering. Select the replacement by the complete part number and the installed equipment configuration. A similar photograph or a shared LiftMaster brand name does not establish interchangeability. Confirm the applicable service drawing before ordering so the repair addresses the correct component and its related mounting, connection and operating requirements.

Compatibility — Models, Versions and Exclusions

Identify the Assembly and Plan the Repair

A keyed drive depends on the fit of the shaft, key and hub together. Inspect both mating keyways for wear or damage and identify the cause of a loose or displaced key. Replacing the key alone cannot correct an enlarged keyway, cracked hub or another attachment fault that continues to allow movement.

Confirm the approved key form and any required separate retaining hardware before service. The catalog term keyway should not be interpreted as a complete replacement shaft or machined hub. Do not grind or shorten a replacement as an improvised repair without an approved specification. Restore the documented drive alignment and retention and complete the affected operating and protection checks after installation.

Compare the replacement with the installed service arrangement before dismantling the equipment. Photograph the part’s location and record the complete model and visible service numbers. Inspect the surrounding attachment points and mating components for wear, impact damage or misalignment. Replacing one worn item will not correct a damaged support or another component that continues to impose abnormal loads on the repaired assembly.

Specifications and Product Identification

Before Ordering

• Record the complete equipment model, serial information and installed service reference.
• Match K80-5001 in the actual service drawing.
• Confirm all three listed dimensions and end form.
• Inspect keyway wear before selecting a key-only repair.
• Confirm the current supplied inventory and exact installation and final testing instructions.

Package Contents and Separate Requirements

This offer identifies the shaft-key service item. Confirm current supplied quantity and end form. A shaft, hub, sprocket, pulley, set screws, other retaining hardware and complete operator are not established as included. Obtain separate worn drive components after the mating keyways and cause of failure have been assessed.

Safety Warnings — Read Before Installation or Service

• WARNING: A moving commercial door and exposed shaft key — 3/16 x 3/16 x 1-3/4 inches can cause serious injury or death. Have a trained door-systems technician perform installation and service.
• Disconnect mains power and any battery backup before mechanical work or wiring. Secure the door against unexpected movement as directed by its manufacturer.
• Do not work on springs, cables or counterbalance components without appropriate training. Never bypass safety sensors or increase force to overcome binding.
• Restore guards and complete the model-specific travel, reversal and protection-device tests before returning the door to normal operation.

Related Products and Important Differences

• CPS-U monitored photo eyes — separate protection devices for approved commercial-door controls; match the operator and environment.
• TDC12X1BMC MAXUM trolley operator — a complete-operator comparison, not evidence that this legacy service part fits MAXUM.

Frequently Asked Questions

Is it a cabinet key?

No. It is a mechanical key for a matching shaft and hub arrangement.

Are three dimensions listed?

Yes. The service description gives 3/16 x 3/16 x 1-3/4 inches; verify complete fit and end form.

Can it repair a worn keyway?

No. Inspect and correct damage to the shaft or hub rather than rely on a new key alone.

Are set screws included?

No retaining hardware is established as included. Confirm the exact service requirements separately.

Need Help Confirming the Right Product?

Contact Garage-DoorParts.com before ordering. Send the full equipment model, readable part labels and photographs of the installed assembly. Include the dimensions, electrical configuration or accessory details relevant to your project so the listing can be checked against the actual installation.