Description
Overview:
The Brush Holder Unit (MPN 638715-5) is a genuine Makita replacement for the HR4001C and HR4011C hammer drills. It houses and guides the carbon brushes, keeping accurate contact with the motor commutator for stable power and reduced sparking. The assembly uses a robust, heat‐resistant moulded body with metal contacts and spring components, manufactured to OEM tolerances for dependable fit and performance. Replacing a worn or heat-damaged holder restores correct brush alignment and prevents premature brush wear, helping protect the motor and maintain drilling performance. Supplied as a complete unit for straightforward replacement during routine servicing, it supports reliable day‐to‐day operation for both professional users and DIY owners of compatible Makita hammer drills.
Key Features:
- Genuine Makita OEM part (MPN 638715-5) for assured compatibility
- Durable, heat‐resistant housing with precision metal contacts
- Maintains correct brush pressure and alignment to minimise arcing
- Restores consistent power delivery and smooth motor operation
- Pre‐assembled holder for quick, tidy installation
- Helps extend carbon brush and motor service life
- Built to fit without modification on the specified models
- Suitable for routine maintenance or corrective repair
Typical Applications:
Used when a drill shows intermittent power, excessive sparking, or heat around the brush area, or after heavy use that has worn the original holder. Suitable for hammer drills working in concrete, masonry, and stone across construction sites, workshops, and maintenance settings where dependable performance and reduced downtime are important.
Also known as:
Brush holder assembly, carbon brush holder, motor brush carrier, brush block, brush cage, commutator brush housing, drill motor brush holder. These terms refer to the same component that positions the brushes and keeps stable electrical contact with the armature for reliable tool operation.
Fits Models:
HR4001C, HR4011C
Alternate Part Numbers:
6387155
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