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.
