DRILL BIT WITH DOUBLE CUTTERS
作者： Karski Rafal
DOI:
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摘要: Drill bit equipped with a chipper bevel and plates cutting edges is characterised by having (4) conical tip no less than two cutter (5) the edge of (7) shaped in layer made polycrystalline diamond (PCD), geometry created from lateral surface cone, whereas cone angle within range 0.5 2 degrees, so that entire external plate contained not just its (5). The drilling (6) chipping blades distributed on both sides connected axial central line body (1). centre spur (3) attached to (1) grub screws (2).
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