Cemented Carbide Peripheral Scrapers for TBM

Cemented carbide peripheral scrapers play a vital role in maintaining tunnel shape, reducing cutterhead wear, and ensuring the safety and efficiency of the TBM operation. Their durability and cutting performance make them an indispensable tool in modern mechanized tunneling.

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monfils.chen@mtwkj.com

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Cemented carbide peripheral scrapers are essential wear parts located on the outer edge of the cutterhead in a Tunnel Boring Machine (TBM). Also known as carbide edge scrapers or rim scrapers, they are designed to clean, trim, and stabilize the tunnel perimeter during excavation, ensuring smooth wall profiles and consistent tunnel diameter.

These scrapers are typically made of high-quality tungsten carbide, offering excellent wear resistance and long service life, even in highly abrasive and mixed-ground conditions.

Key Features:
- High wear resistance: Effectively handles abrasive soils, rocks, and mixed strata
- Tough and impact-resistant: Withstands edge pressure and vibration at the tunnel circumference
- Precision edge geometry: Designed to reduce torque load and enhance cutting efficiency
- Customizable shapes and sizes: Available based on TBM specifications and geological requirements
- Secure mounting: Can be brazed or mechanically fastened for reliable operation
Applications:
- Installed along the outer ring of TBM cutterheads
- Used in Earth Pressure Balance (EPB) and Slurry-type TBMs
- Suitable for subway, highway, water tunnel, and utility tunnel projects
- Effective in soft soil, gravel, clay, mixed ground, and soft rock conditions