I. Basic Information and Core Parameters

• Dimension Specifications

• Thickness: 6mm × Width: 11mm × Length: 13.5mm

• Compact size suitable for carbon brush slots in impact drill motors.

• Product Positioning

• Dedicated carbon brush for DU-16/1000ER model, used for motor current conduction in electric impact drills, a wear-and-tear replacement part.

II. Compatible Equipment and Model Details

• Applicable Tool Types

• Specifically for DU-16/1000ER electric impact drills, commonly found in 1000W models from brands like Dongcheng and Bosch.

• Compatibility Logic

• Designed for medium-high speed operation of impact drills (suitable for 4,000–8,000 RPM), with spring pressure ranging 1.3–1.8kg to ensure stable contact for combined drilling and impact functions.

III. Technical Parameters and Working Mechanism

1. Material Characteristics

• Made of carbon-graphite composite with 15–20% copper powder, conductivity up to 8×10⁻⁵Ω·m, wear coefficient <0.13mm/100h, adapted to high-frequency vibration conditions of impact drills.

2. Current Conduction Principle

• Maintains sliding contact with the commutator via spring pressure to transmit current to rotor windings, driving the drill bit for rotation+impact actions (e.g., 6,000 RPM for a 1000W impact drill).

3. Wear Replacement Thresholds

• Replace immediately when remaining length is less than 1/2 of the original, or when abnormal sparking or significant power reduction occurs to prevent motor failure due to commutator wear.

IV. Installation and Maintenance Guidelines

• Installation Steps

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

2. Clean the commutator surface with alcohol to remove carbon powder, and inspect for burn marks.

3. Polish the new carbon brush arc with sandpaper to fit the commutator, and secure the spring in the fixing slot (recommend calibrating pressure to ~1.5kg with a spring scale).

• Maintenance Recommendations

• Inspect wear every 40–50 hours of use. Replace the carbon brush and spring as a set for optimal pressure matching in impact conditions.

V. Comparison with Other Carbon Brushes

VI. Purchase and Replacement Recommendations

• Specification Verification

• Beyond dimensions, confirm current-carrying capacity (10–12A) and compatible voltage (220V/110V), and note voltage compatibility for imported models.

• Professional Tips

• If the impact drill has difficulty starting or weak impact force, the carbon brush may be worn or the spring failed. Replace the entire assembly and check commutator wear depth (grind for repair if exceeding 0.4mm).