Electric Power Tool Accessories: Makita Carbon Brushes (CB315, CB314, CB318, CB325, CB336) – 16×11×5mm

1. Product Identification

• Brand Compatibility: MK refers to Makita, a leading manufacturer of power tools.

• Models: CB315, CB314, CB318, CB325, CB336 (specific carbon brush model numbers for Makita tools).

• Dimensions: 16mm (length) × 11mm (width) × 5mm (thickness) — uniform size across these models for consistent fit.

• Category: Electric power tool accessories (consumable parts for motor maintenance).

2. Core Function

• Current Conduction: Transmit electrical current from the tool’s power source to the motor’s rotor via contact with the commutator, enabling the motor to run.

• Wear Protection: Designed to wear gradually, protecting the commutator (a critical motor component) from excessive damage during high-speed operation.

3. Compatibility

• Applicable Tools: Specifically for Makita electric power tools that use these CB-series brushes, such as:

• Cordless drills

• Impact drivers

• Angle grinders

• Small sanders or polishers

• Verification: Check your Makita tool’s user manual or model label to confirm compatibility with CB315/CB314/CB318/CB325/CB336.

4. Material & Specifications

• Composition: Graphite-copper composite (typically 10–15% copper content) for balanced conductivity and wear resistance.

• Size Precision: 16×11×5mm ensures a snug fit in the brush holder, preventing loose contact that could cause sparking.

• Service Life: Approximately 40–60 hours of standard use (varies by tool load and operating speed).

5. Replacement Indicators

• Brush length worn down to less than half of original (≈8mm for 16mm length).

• Excessive sparking from the motor during operation.

• Reduced tool power, intermittent operation, or unusual motor noise.

6. Installation & Maintenance

• Replace in pairs (if the tool uses two brushes) to ensure even pressure on the commutator.

• Clean the commutator with alcohol before installation to remove carbon dust buildup.

• Avoid bending the brush leads during installation, as this can damage conductivity.

7. Key Note

• These are genuine or OEM-compatible accessories for Makita tools. Using incorrect brush models or sizes can lead to motor damage, so always cross-verify with your tool’s part list. The 16×11×5mm dimension is critical for proper fit in the brush holder.