Cutter for tunnel boring machine

Details Cutter for tunnel boring machine Cutter for tunnel boring machine

E - Fixed Constructions

21

D

E21D 9/10 (2006.01) E21B 10/12 (2006.01) E21B 10/20 (2006.01)

Patent

CA 2419876

A cutter for a tunnel boring machine is equipped with a cutter body (1) with a slanting surface (2), a cylindrical contact surface (12) and a preferably tapered threaded portion with specially designed threads (6), a clamping ring (4) with threads adapted to the cutter body's threads with a slanting surface (5) with a groove (13) with a spring (14). The cutter has an undivided (3) or divided cutter ring (with segments 3a, 3b) with a cross section with slanting lateral surfaces (7, 8) in the foot and a cylindrical contact surface (11). The diameter of the cutter ring's cylindrical contact surface (11) has a clearance tolerance relative to the diameter of the cylindrical contact surface (12) of the cutter body.

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