Liftmaster K75-50130, COUPLING, Q074
The LiftMaster K75-50130 is a Q074 coupling used in LiftMaster HCT / Hercules overhead gate operator systems. The coupling transfers torque through the drive system and helps maintain alignment between connected shafts in the operator assembly.
A worn or damaged coupling can create vibration, poor torque transfer, noise, shaft misalignment, or intermittent gate movement. Because couplings are sized for specific shafts and drive layouts, this part should be confirmed by the HCT parts diagram and the original coupling dimensions before ordering.
Compatible With
- LiftMaster HCT overhead gate operators
- LiftMaster HCT perimeter access systems
- Elite Hercules / HCT style overhead gate operator references where Q074 is listed
- Not confirmed for CSW, SL, LA, RSW, or barrier gate operators unless the parts diagram lists K75-50130
Also Known As / Related Part Numbers
- K75-50130
- 75-50130
- LM-K75-50130
- Q074
- LiftMaster Q074
- Coupling 3/4 x 5/8 references where listed
Features & Specifications
| Manufacturer | LiftMaster |
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| Product Type | Drive coupling |
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| Part Number | K75-50130 |
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| Application | Shaft coupling / torque transfer |
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| Compatible Operator Type | HCT overhead gate operator |
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| Common Model References | HCT, Hercules overhead gate operator |
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| Also Known As | Q074 |
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| Notes | Shaft size and alignment must match |
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Technician Note
When a coupling fails, inspect both connected shafts, set screws, keys, bearings, and mounting alignment. Replacing only the coupling may not correct a bent shaft or misaligned drive assembly.
Before Ordering
- Confirm the operator is HCT / Hercules style
- Verify Q074 or K75-50130 in the parts diagram
- Compare shaft diameters and coupling length
- Inspect set screws, keys, and shaft wear
- Correct misalignment before installing the new coupling
Professional Advisory
Overhead gate operator drive parts can move unexpectedly if the gate is not secured. Disconnect power and secure the gate before service.
Product Q&A
What is K75-50130 also known as?
It is commonly listed as LiftMaster Q074.
What operator family does it fit?
It is most commonly associated with LiftMaster HCT / Hercules overhead gate operator systems.
What does the coupling do?
It connects drive shafts and transfers torque through the operator drive assembly.
Can it be used on swing or slide operators?
Do not assume that. It should only be used where the parts diagram lists K75-50130 or Q074.
What should be inspected with the coupling?
Check shaft size, shaft wear, set screws, keys, bearings, and alignment before installation.
