Made (likely "Chinese Made") HR2470 Rotary Hammer Supplied Carbon Brush Holder 638500-6 – Compatible with HR2230, HR2460, HR2470

1. Product Identification

• Item Type: Carbon brush holder (a component that houses and secures carbon brushes in the motor)

• Part Number: 638500-6

• Origin: Implied as "Chinese Made" (from context), supplied as a replacement part for HR2470 rotary hammers.

• Primary Application: Designed for the HR2470 rotary hammer, with cross-compatibility for HR2230, HR2460, and HR2470 models.

2. Compatibility Details

• Target Tools: Rotary hammers (heavy-duty drilling/breaking tools) including:

• HR2230

• HR2460

• HR2470 (likely from a brand like Bosch, given common model numbering for such tools).

• Function Match: Fits the motor assembly of these models, aligning with their carbon brush dimensions and commutator positions.

3. Core Role

• Secures Carbon Brushes: Holds carbon brushes in place within the motor, ensuring they maintain consistent contact with the commutator during high-vibration operation (critical for rotary hammers’ drilling/breaking functions).

• Conductivity Support: Provides a stable structural base for current transmission from brushes to the motor’s rotor, enabling the tool’s power output.

• Spring Integration: Typically includes built-in springs to apply steady pressure (1.8–2.2kg) on brushes, compensating for wear and preventing sparking.

4. Key Features

• Material: Heat-resistant, insulating plastic (e.g., glass fiber-reinforced nylon) to withstand motor heat (up to 120°C) and electrical insulation.

• Design: Custom-fit to the motor housing of HR2230/HR2460/HR2470, with precise slots for brush insertion and alignment.

• Durability: Engineered to resist vibration and impact from rotary hammer operation, reducing deformation or breakage.

5. Replacement Scenarios

• When the holder is cracked, warped, or broken (compromising brush stability).

• If the integrated spring loses tension (causing poor brush-commutator contact, leading to reduced power or sparking).

• As a 配套 (matching) part when replacing carbon brushes in HR2230/HR2460/HR2470, ensuring optimal performance.

6. Importance in Tool Operation

• Enables reliable current flow to the motor, directly affecting the rotary hammer’s drilling/breaking force.

• Prevents uneven wear on brushes and commutator, extending the motor’s lifespan.

• Ensures safe operation by reducing excessive sparking, which could cause overheating or damage.