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.
| 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 |
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.
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.
K11-2725 is most strongly associated with the LiftMaster SW420GL swing gate operator family. Other use should be confirmed by the parts diagram.
No. It is a model-specific mechanical shaft and should not be ordered by appearance alone.
Rough movement, looseness in the drive assembly, damaged keyways, abnormal vibration, or poor torque transfer can point to shaft or related hardware wear.
Similar shafts may have different length, keyway, diameter, or collar locations. Use the original part number or diagram to confirm.
A qualified gate technician is recommended if the operator must be opened, the drive train disassembled, or gate movement is unsafe.