1. Product Identification

• Part Number: 10080108

• Compatibility: Dedicated to Bosch GBH4DSC rotary hammer drills

• Quality Grade: High-performance design for prolonged service life

2. Technical Specifications

• Dimensions:

• Thickness: 8mm × Width: 12mm × Length: 22mm

• Material Composition:

• Graphite-copper composite (25% copper content)

• Ceramic wear-resistant additives (≤5%)

• Electrical Parameters:

• Resistance: 8×10⁻⁵Ω·m

• Current rating: 12–15A

3. Compatibility Details

• Applicable Models:

• Bosch GBH4DSC (1100W, 26mm chuck)

• Verified fit for serial numbers starting with "2607335XXX"

• Functional Role:

• Conducts current to rotor windings during impact drilling operations

• Maintains contact with commutator under high-vibration conditions

4. Replacement Indicators

• Residual brush length < 11mm (50% of original 22mm)

• Excessive sparking (visible arcs >5mm) during operation

• Reduced impact frequency or motor stalling

• Commutator grooves deeper than 0.5mm

5. Installation Protocol

1. Disconnect power and remove the motor housing screws

2. Extract the old brush assembly (note spring orientation)

3. Clean commutator with isopropyl alcohol (99%)

4. Polish new brush arc with 400-grit sandpaper for commutator matching

5. Calibrate spring pressure to 2.0–2.3kg using a tension gauge

6. Performance Advantages

• Wear Resistance: <0.12mm/100 hours (30% better than standard brushes)

• Heat Dissipation: Operating temperature ≤120℃ under full load

• Electrical Stability: Consistent conductivity at 1,800–2,800 RPM

7. Purchase & Warranty

• Genuine/OEM Verification:

• Look for Bosch logo and part number embossed on the brush body

• Cross-reference with GBH4DSC service manual (page 18, part list)

• Warranty Terms:

• 6-month guarantee against material defects

• Not covered for wear due to improper maintenance

8. Maintenance Recommendations

• Inspect every 40 hours of use (or 800 impact cycles)

• Replace both brushes simultaneously to ensure balanced pressure

• Store in humidity <60% to prevent graphite degradation