Liftmaster K87-E-050, RETAINING RING CLIP, Q086
The LiftMaster K87-E-050 is a Q086 retaining ring clip, also called an E-clip or external retaining ring, used on compatible LiftMaster shaft assemblies. Its job is to sit in a machined groove and keep a shaft-mounted component, spacer, pulley, sprocket, or related hardware from sliding out of position.
Retaining clips are small parts, but they protect the alignment of larger moving assemblies. A missing or weak clip can allow an idler, shaft, pulley, or bracket component to walk out of place, creating noise, chain or belt misalignment, limit problems, or mechanical binding. Because retaining rings are dimension-specific, the shaft groove and original part number must be confirmed before ordering.
Compatible With
Documented compatibility includes the following, with model-specific confirmation required due to conflicting broad listings:
- LiftMaster HCT overhead gate operators where Q086 retaining ring is specified
- LiftMaster HCTDCU overhead gate operators where Q086 retaining ring is specified
- LiftMaster HCTDCUL references where the same retaining clip is shown
- HS670 and HS670GL industrial operator references in some parts listings
- Any LiftMaster operator shaft assembly that calls out K87-E-050, 87-E-050, or Q086 in the parts diagram
Features & Specifications
| Manufacturer | LiftMaster |
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| Product Type | Retaining Ring Clip / E-Clip |
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| Part Number | K87-E-050 |
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| Related Size / Reference | Q086 |
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| Application | Shaft component retention |
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| Compatible Operator Type | Select overhead and industrial gate operators |
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| Material / Finish | Metal retaining clip |
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| Notes | Confirm shaft diameter and groove size |
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Also Known As / Related Part Numbers
- K87-E-050
- 87-E-050
- Q086
- Retaining ring clip
- E-clip
- External retaining ring
Technician Note
When replacing this clip, look for the reason it came off. A bent clip, worn groove, loose idler, or side-loaded shaft can allow the retaining ring to fail again. Replace any worn mating parts instead of relying on a new clip to hold a damaged assembly together.
Before Ordering
- Verify K87-E-050 or Q086 in the operator parts diagram
- Confirm the shaft groove and diameter before ordering
- Inspect the clip groove for wear, burrs, or deformation
- Check the retained component for side play or misalignment
- Replace damaged clips rather than reusing sprung or distorted rings
Professional Advisory
Retaining rings are often located near moving chains, belts, pulleys, or shafts. Disconnect power and secure the gate before service. Use proper retaining ring tools where applicable.
Important Ordering Warning
Some listings associate this part with HCT/HCTDCU while others reference HS670/HS670GL. Treat model fitment as parts-diagram based, not universal.
Product Questions
What is the Q086 reference?
Q086 is the related size or diagram reference commonly associated with the K87-E-050 retaining ring clip.
Can I reuse the old retaining ring?
Only if it is not stretched, bent, corroded, or weakened. A distorted retaining ring should be replaced.
What happens if this clip is missing?
The retained component can move out of position, which may cause misalignment, noise, binding, or damage to nearby parts.
Does this fit HCT and HCTDCU operators?
Several listings support HCT and HCTDCU overhead gate operator use, but the exact shaft location should be confirmed by diagram.
Why is HS670 mentioned on some listings?
Some supplier references associate the Q086 clip with HS670 or HS670GL applications. Because listings differ, verify the original parts diagram before ordering.
