Description
Overview:
This Genuine Makita Brush Holder, Part No. 643770-4, is a replacement brush carrier assembly designed to keep carbon brushes correctly seated for stable electrical contact and efficient motor performance. Built from heat‑resistant engineering plastic with metal terminals, it withstands the heat and vibration found in demanding tool use. Suitable for select Makita angle grinders and sanders, it helps restore smooth running and reduce sparking when brush holders are worn or damaged. Ideal for regular maintenance by tradespeople and DIY users, it fits models including the GA5040C angle grinder and BO6050 sander, keeping your tools operating reliably on site or in the workshop. This is a genuine Makita component for accurate fit and dependable service life.
Key Features:
- Genuine Makita OEM replacement (643770-4) for assured fit and compatibility
- Holds carbon brushes securely to maintain consistent contact with the commutator
- Heat‑resistant housing and robust metal contacts for durability under load
- Helps reduce arcing, restore power delivery, and extend motor and brush life
- Direct replacement with no modifications required
- Supports quick routine maintenance to minimise downtime
- Suitable for selected angle grinders and sanders, including GA5040C and BO6050
- Supplied as a single brush holder assembly
Typical Applications:
Used in Makita angle grinders and sanders where precise brush alignment is essential. Common during service intervals or when symptoms such as intermittent power, excessive sparking, or poor start-up appear. A practical fix to maintain tool efficiency in metalworking, stone finishing, surface preparation, and woodworking tasks.
Also known as:
Brush carrier, armature brush holder, brush block, motor brush cage.
Fits Models:
BO6050, GA4540C, GA5040C, PC5010C, PO6000C
Alternate Part Numbers:
643770-4, 643770 4, 6437704
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