Liftmaster K081C0111, SPROCKET
The LiftMaster K081C0111 is a 10-tooth replacement sprocket used in select LiftMaster and Chamberlain residential garage door opener drive assemblies. A worn sprocket can cause rough movement, grinding, jumping, chain or belt tracking issues, or incomplete travel when the opener is under load. This is a small mechanical part, but it has to match the original drive layout because tooth count, bore, shaft fit, and rail style affect how the drive system moves the trolley. It is best used when the original parts diagram calls out K081C0111, 081C0111, or 81C111. If the opener has heavy wear around the drive gear, chain, belt, or trolley, inspect those related parts at the same time so a new sprocket is not installed into a worn drive system.
Compatible With
Common Compatible Models and Applications
- Select LiftMaster residential garage door openers that list K081C0111 in the parts diagram
- Select Chamberlain residential garage door openers that use the same 10-tooth sprocket
- Drive assemblies where the original sprocket is marked or cross-referenced as 081C0111 or 81C111
Additional Model Families to Verify
- Related LiftMaster, Chamberlain, and Sears Craftsman opener families only when the parts diagram confirms this exact sprocket
- Older and current residential chain or belt drive assemblies that use this 10-tooth sprocket design
Important Compatibility Notes
- Verify tooth count and original part number before ordering
- Do not substitute a similar-looking sprocket with a different bore, tooth count, or drive configuration
- If the opener is noisy or slipping, inspect the gear, chain/belt, trolley, and rail parts before replacing only the sprocket
Features and Specifications
| Feature / Specification | Details |
|---|
| Manufacturer | LiftMaster / Chamberlain Group |
| Product Type | Garage door opener sprocket |
| Part Number | K081C0111 |
| Tooth Count | 10 tooth |
| Application | Residential garage door opener drive assembly service |
| Compatible Operator Type | Select LiftMaster and Chamberlain garage door openers |
| Notes | Match by parts diagram, sprocket tooth count, and original part number |
Also Known As / Related Part Numbers
- K081C0111
- 081C0111
- 81C111
- LiftMaster 081C0111
- Chamberlain 081C0111
Technician Note
Match this part to the exact opener model, original part number, and replacement parts diagram. Similar LiftMaster and Chamberlain parts can look alike but may not interchange across rail styles, board generations, safety systems, or operator families.
Before Ordering Checklist
- Confirm the opener or operator model number before ordering
- Compare the original part number or marking to the related numbers listed above
- Check the replacement parts diagram for the exact hardware, board, sensor, or rail assembly
- Inspect surrounding parts for wear so the replacement is not installed into a failing assembly
- For electrical, logic board, or safety-device work, shut off power and use a qualified technician when needed
Important Ordering Warnings
- Verify exact model and parts diagram before ordering
- Do not substitute similar-looking parts without confirming dimensions, frequency, rail type, or board generation
Professional Advisory
Garage door and gate operator repairs can involve spring tension, moving doors, high-voltage wiring, monitored safety devices, and heavy gate hardware. If the repair involves unsafe movement, electrical testing, or required entrapment protection, have the system inspected by a qualified gate or garage door technician.
Product Questions and Answers
What does the LiftMaster K081C0111 sprocket do?
It helps transfer drive motion through the garage door opener drive assembly so the trolley can move the door along the rail.
Is K081C0111 used on every LiftMaster opener?
No. It is used only on select LiftMaster and Chamberlain opener assemblies that call for this 10-tooth sprocket in the parts diagram.
How do I know if my sprocket is worn?
Common signs include worn or missing teeth, rough opener movement, grinding near the drive area, chain or belt jumping, or inconsistent trolley movement.
Can I choose this sprocket by appearance?
No. Similar sprockets may have different tooth counts, bores, or mounting details. Match the original part number and service diagram.
Should other parts be checked when replacing this sprocket?
Yes. Inspect the chain or belt, gear, trolley, rail, and related drive hardware so the new sprocket is not installed with worn companion parts.
