Description
Overview:
This Genuine Makita gear assembly (part no. 125485-0) is a direct replacement for the drivetrain in selected Makita cordless combi drills, including the 8391D and BHP453. Built with metal components for strength and reliability, it transfers power from the motor to the chuck to keep drilling and screwdriving smooth and consistent. If your drill is slipping, grinding, or struggling to hold speed, replacing the worn gears with this unit restores proper operation and helps protect the motor and chuck from further wear. Designed to fit the specified Makita models without modification, it is suitable for both trade and DIY users who need a dependable repair to keep their drill working to its original performance.
Key Features:
- Genuine Makita replacement part (125485-0) for assured fit and performance
- Direct-fit gear assembly for the specified combi drills, no modifications needed
- Metal construction for durability under frequent use on site or in the workshop
- Restores smooth drive, reliable torque transfer, and efficient operation
- Helps extend overall tool life by replacing worn or damaged gears
- Precisely matched to Makita housings to maintain correct alignment and tolerances
- Easy to install using standard hand tools, minimising downtime
- Stable performance for drilling and screwdriving across common materials
- Cost-effective repair compared with replacing the complete tool
- Suitable for routine maintenance or as a preventative spare in busy fleets
Typical Applications:
Used to replace a stripped, noisy, or slipping gearbox in Makita combi drills, restoring reliable power delivery for everyday drilling and screwdriving in timber, metal, and plastics, and supporting hammer drilling where the model allows. Ideal for site repairs, workshop servicing, and maintaining tool fleets.
Also known as:
Drill gearbox, gear set, drive gear unit, transmission assembly, reduction gear, drive train, gear pack, replacement gearbox, motor-to-chuck gear, internal drill gears.
Fits Models:
8391D, BHP453, DHP453SFE, DHP453SY
Alternate Part Numbers:
1254850
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