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Single disc cutter, also known as single disk, is a kind of disc cutter with only one cutter ring, which is mounted on the front and gauge area of the cutter head. It is mainly used as face cutter and gauge cutter to break hard rock with high uniaxial compressive strength (UCS≥70Mpa) and mixed ground. It is a key cutting tool for rock excavation.

Eccentric disk cutter is a kind of single tool used to break rocks. The cutter ring of eccentric disc cutter for drill is inclined to one side of the cutter hub, and this type of TBM disc cutter is usually mounted on the gauge area of cutter head, also known as gauge disc cutter.