Ring cutter for tunnel drilling in rock

Details Ring cutter for tunnel drilling in rock Ring cutter for tunnel drilling in rock

E - Fixed Constructions

21

C

E21C 25/18 (2006.01) E21B 10/12 (2006.01) E21B 10/20 (2006.01) E21D 9/10 (2006.01)

Patent

CA 2074531

2074531 9111588 PCTABS00006 Cutter ring for drilling tunnels in rock, comprising two substantially identical halves being clamped to a rotation body (2) with two pins (6) arranged diametrically opposed each other and protruding into corresponding shaped holes (9) in the cutter ring halves, which radially inwardly directed portions having dovetail form for clamping in corresponding dovetail groove in the rotation body (2), whereby the dovetail groove being established by an inclined surface in the rotation body and by a wedge formed clamping ring (4) which is tightened radially inwards by means of bolts (5), between the cutter ring (1) and a second inclined surface in the rotation body, where the cutter ring halves being arranged on the rotation body with gaps (3) between the halves and the gaps (3) being offset 90· in relation to the pins (6).

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