I. Basic Information and Product Positioning

• Product Code: 61114

• Core Attribute: A replacement carbon brush for power tools, serving as a wear-and-tear component for motor current conduction.

• Application Scenarios: Suitable for small to medium-sized power tools such as drills, angle grinders, and rotary hammers. Specific compatibility requires verification with the brand and model.

II. Technical Parameters and Dimensional Specifications

1. Typical Dimension Reference

• Subject to physical measurement, common specifications may be 6×12×18mm (thickness×width×length), with a tolerance of ±0.5mm for some models.

2. Material Characteristics

• Typically made of electrographite with 15–20% copper powder, featuring conductivity up to 10⁻⁵Ω·m and a wear coefficient <0.15mm/100h.

III. Compatible Equipment and Compatibility Logic

• Brand and Model Examples

• May be compatible with specific models from brands like Bosch and DeWalt (e.g., Bosch TSB1300 drill, DeWalt D28402 angle grinder). Verification should be done via the old brush dimensions or equipment manual.

• Key Compatibility Points

• Matching the brush slot size, adapting to spring pressure (typically 1.5–2kg), and ensuring consistency with the motor commutator arc.

IV. Working Principle and Replacement Thresholds

• Current Conduction Mechanism

• The carbon brush contacts the commutator via spring pressure to transmit current to the rotor windings, driving the tool. The graphite-based material ensures stable contact at high speeds (e.g., angle grinders at 10,000 RPM).

• Wear Replacement Criteria

• Replace when the remaining length is less than 1/3 of the original.

• Abnormal sparking, reduced power, or difficult startup in the motor.

V. Installation and Maintenance Guidelines

• Installation Steps

1. Power off and remove the tool's rear cover; extract the old carbon brush and spring.

2. Clean the commutator surface with alcohol to remove carbon powder, and inspect for scratches or burns.

3. Polish the new brush arc to fit the commutator, ensuring uniform spring pressure (calibrate with a spring scale if needed).

• Maintenance Recommendations

• Inspect wear every 50–80 hours of use. Replace the carbon brush and spring assembly simultaneously for optimal performance.

VI. Purchase Notes and Precautions

• Specification Verification

• In addition to the code, measure the old brush dimensions (precise to 0.1mm) and confirm the current-carrying capacity (typically 10–15A) and compatible voltage.

• Compatibility Tips

• If unable to match the model, provide the tool brand, model, and photos of the old brush to query the exact specifications through after-sales services or parts databases.