Description
Overview:
This Brush Holder 6x9 (MPN 643839-4) is a Genuine Makita part for selected compact angle grinders, including GA4034 and GA4534. It houses and guides the carbon brushes, keeping steady contact with the commutator so the motor runs efficiently. The holder is built from durable, heat‐resistant polymer with robust metal terminals and spring supports for reliable electrical connection. Sized for 6 x 9 mm brushes, it helps reduce sparking and uneven wear, supporting smooth starts and consistent power delivery. Ideal for maintaining everyday site and workshop tools, it replaces worn or damaged holders that can cause intermittent operation. Fitted correctly, this OEM component restores proper brush alignment and extends service life of the grinder's motor assembly across compatible Makita models.
Key Features:
- Genuine Makita spare (643839-4) for assured fit and function on listed angle grinders
- Sized for 6 x 9 mm carbon brushes to maintain correct alignment and pressure
- Heat‐resistant construction with durable metal contact points for stable conductivity
- Helps reduce arcing, brush chatter, and uneven wear for smoother motor performance
- Supports consistent power delivery and extends overall brush and commutator life
- Manufactured to Makita OEM specification for reliability in trade and DIY use
- Designed for straightforward replacement by competent users; follow the service manual
- Suitable as a like‐for‐like replacement when refurbishing or servicing the motor housing
Typical Applications:
Replacement of worn, heat‐damaged, or cracked brush holders during servicing of Makita angle grinders. Useful when diagnosing intermittent power, excessive sparking, or rapid brush wear. Commonly fitted during preventative maintenance, motor overhauls, or after heavy site use to restore reliable operation.
Also known as:
Brush retainer, carbon brush carrier, motor brush cage, brush carrier, carbon brush retainer.
Fits Models:
GA4030R, GA4034, GA4530R, GA4534, GA5030R, GA5034
Alternate Part Numbers:
6438394
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