Liftmaster K11-2725, DRIVE SHAFT
The LiftMaster K11-2725 is a replacement drive shaft used inside the mechanical drive section of select commercial swing gate operators. On a swing gate operator, the shaft is part of the torque-transfer path between the motor/gear train and the moving arm or output linkage. When this shaft is worn, bent, grooved, or damaged at the keyway, the operator may still run but can sound rough, lose smooth motion, or place extra stress on adjoining sprockets, bearings, collars, and disconnect parts. This is not a cosmetic cover or general hardware item; it is a fitment-sensitive mechanical part that should line up with the exact operator breakdown. The strongest published application for K11-2725 is the LiftMaster SW420GL swing gate operator family, with some sources describing it more generally for select LiftMaster or OSCO industrial swing gate operator applications. For best results, compare the original shaft, keyway, set screw locations, and parts diagram before ordering.
Compatible With
- LiftMaster SW420GL swing gate operators
- Select LiftMaster commercial swing gate operator applications when the parts diagram lists K11-2725
- Select older LiftMaster / Elite / OSCO swing gate operator assemblies where the original shaft number matches
- Not confirmed as a universal CSW200, CSW24V, LA400, LA412, or residential garage opener shaft
Also Known As / Related Part Numbers
- K11-2725
- 11-2725
- 112725
- G112725
- LiftMaster drive shaft K11-2725
Features & Specifications
| Manufacturer | LiftMaster / Chamberlain Group |
|---|
| Product Type | Drive shaft |
|---|
| Part Number | K11-2725 |
|---|
| Application | Commercial swing gate operator drive assembly |
|---|
| Compatible Operator Type | Select swing gate operators |
|---|
| Material / Finish | Steel shaft; finish may vary by production run |
|---|
| Notes | Match to the operator parts diagram and original shaft before ordering |
|---|
Technician Note
This is a fitment-sensitive mechanical service part. Check the original part number, operator model, shaft length, keyway or flat location, retaining hardware, and parts diagram before ordering. Similar LiftMaster shafts may look close in photos but may not share the same diameter, length, or hardware position.
Before Ordering Checklist
- Confirm the complete LiftMaster operator model and suffix from the nameplate.
- Compare the original shaft or bolt to the parts diagram callout.
- Inspect related sprockets, bearings, collars, keys, chain hardware, and retaining clips.
- Do not substitute a similar-looking shaft unless the part number or diagram confirms the match.
- For operators that move unsafely, bind, or have damaged drive hardware, have the system inspected by a qualified gate technician.
Professional Advisory
Gate operator drive components are under load and may be connected to heavy moving gates, chains, springs, or high-voltage operator sections. Disconnect power where required by the manufacturer instructions and use a qualified gate technician when drive-train disassembly, electrical work, or unsafe gate movement is involved. Do not bypass required safety devices to test or operate the gate.
Product Q&A
What operator is K11-2725 most commonly used with?
K11-2725 is most strongly associated with the LiftMaster SW420GL swing gate operator family. Other use should be confirmed by the parts diagram.
Is this a universal LiftMaster drive shaft?
No. It is a model-specific mechanical shaft and should not be ordered by appearance alone.
What symptoms can point to a worn drive shaft?
Rough movement, looseness in the drive assembly, damaged keyways, abnormal vibration, or poor torque transfer can point to shaft or related hardware wear.
Can this shaft be substituted with another similar LiftMaster shaft?
Similar shafts may have different length, keyway, diameter, or collar locations. Use the original part number or diagram to confirm.
Should a technician install this part?
A qualified gate technician is recommended if the operator must be opened, the drive train disassembled, or gate movement is unsafe.
