Overview
Replacement carbon brushes restore proper electrical contact between the stationary housing and the spinning armature in brushed power tools. As brushes wear down during normal operation, intermittent sparking, reduced power, and eventual motor failure can occur. These aftermarket brushes are manufactured to OEM dimensions for a precise fit.
Key specifications
- Aftermarket carbon brush replacement
- Manufactured to OEM dimensions
- Pre-formed contact surface for faster break-in
- Spring-loaded design for consistent pressure
Compatibility
These brushes are designed for Makita power tools as listed in the compatibility section above. Verify your tool’s model number and brush part number before purchasing to ensure correct dimensions and lead configuration.
Installation notes
Disconnect the power source before servicing. Locate the brush caps on the motor housing, typically held by a slotted cap or Phillips screw. Remove each worn brush and note its orientation, then insert the replacement brush and secure the cap. Run the tool briefly at low speed to seat the new brushes.
Common questions
Q: Will these 194074-2 carbon brushes fit my Makita 9557NB2 and GA5040 angle grinders, or are they only for one specific model?
Yes, this brush set is compatible with both the Makita 9557NB2 and GA5040, along with other listed models like 9557NB, 9558NB, 9563CV, and 9564CV. Since it replaces several brush numbers including CB340, CB314, CB315, CB336, CB330, and CB318, it covers a wide range of matching Makita grinders that use that brush style.
Q: My Makita 9563CV is sparking and cutting out under load. Could worn 194074-2 brushes be the cause?
Yes, excessive sparking, intermittent power, and reduced performance are common signs that the motor brushes are worn down and need replacement. On the 9563CV, checking the brush length and replacing both brushes as a pair is the right first step before assuming there is a larger motor problem.
Q: Do I need to do anything special after installing these 194074-2 carbon brushes in a 9558PB or 9564H grinder?
After installation, make sure both brushes move freely in the holders and the springs are seated correctly before reassembling the tool. It is also a good idea to run the grinder with no load for a few minutes so the new brushes can seat properly against the commutator, which helps reduce arcing and improves brush life.
