I. Basic Information and Core Parameters

• Dimension Specifications

• Thickness: 6mm × Width: 16mm × Length: 17/18mm (length tolerance for different motor batches)

• Core Attribute

• Specialized carbon brush for power tools, serving as a wear-and-tear replacement component for breaker motor current conduction.

II. Compatible Equipment and Model Details

• Applicable Tool

• Specifically designed for TTB280DRH breaker model, compatible with universal parts of similar models from brands like Bosch and DeWalt (subject to actual motor specifications).

• Compatibility Logic

• Dimensions tailored for high-load breaker motors, with spring pressure ranging 1.8–2.2kg to ensure stable contact during high-frequency impact operations.

III. Technical Parameters and Working Mechanism

1. Material Characteristics

• Electrographite with 20% copper powder, conductivity up to 8×10⁻⁵Ω·m, wear coefficient <0.2mm/100h (suitable for breaker operation at 1,800 RPM).

2. Current Conduction Principle

• Maintains sliding contact with the commutator via spring pressure, transmitting current to rotor windings to drive the breaker piston (e.g., impact frequency of 4,500 times/minute).

3. Wear Replacement Threshold

• Replace immediately when remaining length is less than 1/3 of original or severe sparking occurs, preventing motor jamming due to excessive commutator wear.

IV. Installation and Maintenance Guidelines

• Installation Steps

1. Power off and remove the breaker rear cover; extract the old carbon brush and spring.

2. Clean commutator surface carbon powder with alcohol and inspect for burn marks.

3. Polish the new carbon brush arc with sandpaper to fit the commutator, maintaining spring pressure at 1.5–2kg (calibrate with a spring scale).

• Maintenance Recommendations

• Inspect wear every 30 hours of use; replace carbon brush and spring as a set for optimal pressure matching in high-frequency impact scenarios.

V. Comparison with Other Carbon Brushes

VI. Purchase and Replacement Recommendations

• Specification Verification

• Beyond dimensions, confirm current-carrying capacity (12–15A) and compatible voltage (220V/110V) to avoid motor overheating from parameter mismatch.