Then attach the same drill bit to your hand drill, run it through the hole in the scrap piece, and use that almost like a stencil or guide to drill through the piece that you actually need. 7.

Effective removal of cuttings from the central channel of the drill tool is critical for directional drilling using pneumatic down-the-hole hammers, yet the flow behavior of cuttings in reverse ...

Star Copper continues spinning drill bit in Canada Star Copper (CSE:STCU) is continuing to expand its discovery at its Star Project in British Columbia, Canada, following the drilling of a third hole ...