LiftMaster K07-2705 Arm Stop Overview
The LiftMaster K07-2705 is a mechanical arm stop used in select commercial swing gate operator arm assemblies. Its job is to provide a physical stop point or buffer within the drive-arm mechanism so the gate and operator linkage are controlled at the end of travel. On heavy swing gate operators, worn or damaged mechanical stops can create clunking, overtravel, poor arm positioning, or stress on the drive linkage.
This is a fitment-sensitive mechanical part. Current listings commonly describe K07-2705 as being used with high-torque LiftMaster and OSCO industrial swing gate series, including CSW200 and CSW24V-style references. Because swing operator parts changed across Elite, LiftMaster, UL, U, V, and VDC generations, this arm stop should be matched to the operator parts diagram and the existing arm hardware. It should not be confused with the arm hub, disconnect bushing, output shaft kit, or complete arm assembly.
Compatible With
Use this arm stop only where the operator parts diagram supports K07-2705 or a confirmed related number:
- Select LiftMaster commercial swing gate operators using the K07-2705 arm stop
- Commonly associated with CSW200 swing gate operator family references
- Commonly associated with CSW24V-style swing gate operator references where the parts diagram supports it
- Legacy Elite / OSCO industrial swing gate operator applications with matching arm stop hardware
- Verify CSW200U, CSW200UL, CSW24U, CSW24UL, and CSW24VDC suffix models by exact diagram before ordering
Features and Specifications
| Manufacturer | LiftMaster / Chamberlain Group |
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| Product Type | Arm stop / mechanical stop component |
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| Part Number | K07-2705 |
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| Application | Commercial swing gate operator arm assembly service part |
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| Compatible Operator Type | Select high-torque commercial swing gate operators |
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| Material / Finish | Heavy-duty mechanical hardware; verify current supplied finish |
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| Notes | Not a complete arm assembly and not interchangeable with arm hub K07-2706 |
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Also Known As / Related Part Numbers
- K07-2705
- 07-2705
- 072705
- G072705
- LiftMaster arm stop
- CSW200 arm stop reference
- CSW24V arm stop reference
Technician Note
A damaged arm stop can be a symptom of a gate that is binding, hitting a hard stop, or adjusted beyond its intended travel. Inspect hinges, gate stops, limit settings, and arm geometry before replacing only the part.
Before Ordering
- Confirm the operator model and generation from the nameplate
- Match the original arm stop to K07-2705 or a confirmed related number
- Review the arm assembly parts diagram before ordering
- Inspect the arm hub, output shaft, fasteners, and gate stops for related wear
- Do not adjust mechanical stops to override proper limit or entrapment-protection setup
Professional Advisory
Heavy swing gate arms store force and can move suddenly if not secured. Mechanical swing gate repairs should be performed by a qualified gate technician when the arm assembly is damaged or out of adjustment.
Product Questions and Answers
What does the K07-2705 arm stop do?
It acts as a physical stop or limit buffer in select commercial swing gate operator arm assemblies.
Is K07-2705 used on CSW200 operators?
It is commonly associated with CSW200 family references, but the exact CSW200 generation should be checked by parts diagram.
Is this the same as the K07-2706 arm hub?
No. K07-2705 is an arm stop. K07-2706 is an arm hub and is a different mechanical part.
Can a broken arm stop indicate another problem?
Yes. Binding hinges, incorrect limit settings, poor arm geometry, or missing gate stops can overload the arm stop.
Does this fit all LiftMaster swing gate operators?
No. It fits select commercial swing operator applications only when the diagram calls for this part.
