Liftmaster K12-3000, FLANGED BEARING, 1-1/4"X1/8"
The LiftMaster K12-3000 is a flanged bearing / bushing component used in select commercial gate operator mechanical sections. It supports a moving shaft or pivot area and helps keep the drive or arm linkage running smoothly without excessive metal-to-metal wear.
This type of bearing is often replaced when the original part has worn thin, loosened in its mounting point, or started creating play in the operator mechanism. It is a fitment-sensitive part, so the 1-1/4 inch x 1/8 inch reference should be used along with the model parts diagram rather than by size alone.
Common Replacement Reasons
- Worn or loose flanged bearing
- Shaft or pivot has side play
- Mechanical linkage has rough movement
- Visible wear at bearing flange
- Drive or arm assembly is being rebuilt
Compatible With
Common Compatible Applications
- Select LiftMaster commercial gate operator assemblies
- Select Elite / OSCO high-torque swing gate operators
- CSW200 series references where K12-3000 or 12-3000 is shown in the parts diagram
Important Compatibility Notes
Do not substitute by diameter only. Confirm flange thickness, installed position, and mating shaft condition.
Features & Specifications
| Feature / Specification | Details |
|---|
| Manufacturer | LiftMaster / Chamberlain Group |
| Product Type | Flanged bearing / sleeve bushing |
| Part Number | K12-3000 |
| Dimension Reference | 1-1/4 inch x 1/8 inch |
| Application | Gate operator shaft or pivot support |
| Compatible Operator Type | Select commercial swing gate operator assemblies |
| Notes | Match by parts diagram and original part number |
Also Known As / Related Part Numbers
- K12-3000
- 12-3000
- 123000
- G123000
- LM-K12-3000
Technician Note
When a flanged bearing wears, the mating shaft or bracket may also be worn. Check for ovaled mounting holes or shaft scoring before installing the replacement.
Before Ordering
- Match the manufacturer part number to the operator parts diagram before ordering.
- Compare the shaft, bearing, bushing, or gasket dimensions against the removed part.
- Check the operator model, series, and generation because similar LiftMaster mechanical parts may not interchange.
- Inspect nearby collars, sprockets, chains, keys, fasteners, and bushings for wear before reassembly.
- For commercial gate or barrier operators, have a qualified technician handle service if the gate movement is unsafe or the drive system is under load.
Professional Advisory
Commercial gate and barrier operator drive parts should be serviced with the gate secured, power disconnected according to the operator manual, and all safety devices left in proper working order. Do not bypass entrapment protection or operate a damaged gate system to test a mechanical repair.
Product Questions & Answers
What is K12-3000?
It is a flanged bearing or sleeve bushing used in select LiftMaster commercial gate operator mechanical assemblies.
What dimensions are commonly listed?
It is commonly listed with a 1-1/4 inch x 1/8 inch dimensional reference.
What operator family is it commonly associated with?
It is commonly associated with select high-torque swing gate operator references, including CSW200 style diagrams when confirmed.
Is K12-3000 interchangeable with K12-2727?
No. They are different bushing or bearing sizes and should not be treated as interchangeable.
What related part numbers should be included?
Related numbers include 12-3000, 123000, G123000, and LM-K12-3000.
