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Spiral blades

Spiral blades

The spiral blades are one of the key components at the front of the EPB and are usually located behind the cutterhead (or cutting head). It consists of a series of curved blades arranged in a spiral pattern. These blades are usually made of high-strength steel to resist the high pressures and abrasion of the underground environment.

  • Brand name :

    SANXIN

The working principle of the shield machine is to cut and transfer the soil or rock to the inside of the shield machine by rotating the spiral blades, and then use the propulsion of the spiral blades to push the cut soil or rock out of the tunnel. The design of the spiral blades allows the EPB to advance and excavate.

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