The Makita Carbon Brush Set CB-440 is a crucial replacement component designed for trade professionals and DIY enthusiasts. It ensures efficient electrical contact in a wide range of compatible Makita cordless tools, restoring power and extending their operational life. While essential for tool performance, carbon brushes are wear items that require periodic inspection and replacement to maintain optimal functionality.
Essential Electrical Contact: Facilitates efficient transfer of electricity to the tool's motor, critical for operation.
Performance Restoration: Replacing worn brushes helps restore your Makita tool's original power, speed, and efficiency.
Wide Makita Compatibility: Designed for use across numerous Makita cordless tools, including various Auto Feed Screwdrivers, Screw guns, Drill drivers, Impact Drills, Angle Grinders, Impact drivers, Impact Wrenches, Electric Shears, and Angle Drills. (MPN: 194427-5)
Genuine Makita Part: Ensures proper fit, reliable performance, and adherence to Makita's quality standards.
Set of Two Brushes: Each package contains two carbon brushes, providing a complete replacement set for one tool.
Restores Tool Performance: Brings back the power and efficiency of tools suffering from worn brushes.
Extends Tool Lifespan: Prevents damage to the motor's commutator and prolongs the overall life of your Makita tool.
Genuine Manufacturer Part: Guarantees compatibility and reliability with specified Makita models.
Broad Application: Compatible with a large array of popular Makita cordless power tools, making it a versatile maintenance item.
Cost-Effective Repair: Often a more economical solution than replacing an entire tool due to brush wear.
Wearable Component: Carbon brushes naturally wear down over time, requiring periodic replacement.
Tool-Specific Compatibility: Only suitable for specific Makita models; not a universal brush.
Requires Disassembly: Installation involves opening the tool's motor housing, which requires basic DIY skills.
Potential for Incorrect Installation: Improper seating can lead to tool malfunction or further damage.
Restores Tool Performance: Brings back the power and efficiency of tools suffering from worn brushes.
Extends Tool Lifespan: Prevents damage to the motor's commutator and prolongs the overall life of your Makita tool.
Genuine Manufacturer Part: Guarantees compatibility and reliability with specified Makita models.
Broad Application: Compatible with a large array of popular Makita cordless power tools, making it a versatile maintenance item.
Cost-Effective Repair: Often a more economical solution than replacing an entire tool due to brush wear.
Wearable Component: Carbon brushes naturally wear down over time, requiring periodic replacement.
Tool-Specific Compatibility: Only suitable for specific Makita models; not a universal brush.
Requires Disassembly: Installation involves opening the tool's motor housing, which requires basic DIY skills.
Potential for Incorrect Installation: Improper seating can lead to tool malfunction or further damage.
Carbon brushes are a vital component in many brushed electric motors, including those found in your Makita cordless tools. They serve as an electrical conduit, transferring current from the stationary parts of the motor to the rotating commutator. Over time, friction causes these carbon brushes to wear down.
Identifying worn carbon brushes is key to timely replacement and preventing damage to your tool:
Reduced Power or Intermittent Operation: Your tool may not operate at full power, or it might cut out sporadically.
Excessive Sparking: You might notice more sparks than usual emanating from the motor vents.
Burning Smell: A distinct burning odor can indicate brushes wearing down excessively or arcing.
Tool Stops Completely: In severe cases, the tool may stop working entirely as the brushes can no longer make contact.
When brushes become too short or damaged, they lose proper contact with the commutator. This leads to inefficient power transfer, excessive heat buildup, and potential damage to the motor's internal components. Replacing them with the CB-440 set restores efficient electrical contact, ensuring your tools, such as the BFR550 Auto Feed Screwdriver or DHP458 Drill Driver, operate with their intended power and reliability. This maintenance step is crucial for trade professionals relying on consistent tool performance and DIY enthusiasts looking to extend the life of their investments.
Replacing carbon brushes is a common maintenance task. Always refer to your specific Makita tool's user manual for detailed, model-specific instructions.
Safety First: Ensure the tool is completely disconnected from any power source. For cordless tools, remove the battery pack before proceeding.
Locate Brush Caps: Identify the brush caps, usually small, often slotted or Phillips-head screws on the side of the motor housing. Some tools may require partial disassembly of the casing.
Remove Old Brushes: Unscrew the brush caps. Carefully pull out the old carbon brushes and their springs. Note their orientation.
Insert New Brushes: Carefully slide the new Makita CB-440 carbon brushes into their slots. Ensure the spring provides proper tension and the brush makes full contact with the commutator.
Secure Caps: Re-attach and tighten the brush caps securely. Do not overtighten.
Test Tool: Reinsert the battery (for cordless tools) and perform a brief test run to ensure proper operation. Listen for unusual noises or excessive sparking.
This Makita Carbon Brush Set CB-440 (194427-5) is compatible with a wide range of Makita cordless tools, including:
Auto Feed Screwdrivers: BFR540, BFR550, BFR750
Screw guns: BFS440, BFS441, BFS451, BFS45
Cordless Drill drivers: BHP440, BHP442, BHP446, BHP450, BHP451, BHP452, BHP456, DHP458
Cordless Impact Drills: BTD140
Cordless Drills: BTP130, BTP140
Angle Grinders: BDA340, BDA341
Impact drivers: BTD130F, BTD134, BTD146
Impact Wrenches: BTW152, BTW251
Electric Shears: BJS130
Angle Drills: BDA350, BDA351
Always verify your tool's model number against this list or your tool's manual to ensure correct compatibility.
Carbon brushes are a wear-and-tear item and do not require specific 'care' beyond timely replacement. Regular inspection, especially if your tool experiences heavy use, can help you identify worn brushes before they cause tool failure. Replace them as soon as signs of significant wear appear.