Tag: Gundrilling

Deep Hole Drilling Services: Gundrilling and BTA for High Depth-to-Diameter Bores

Once a hole gets deeper than about ten times its diameter, an ordinary twist drill stops being a tool and starts being a liability. It wanders, it packs with chips, it burns, and it produces a bore that drifts off centre by millimetres over its length. Deep hole drilling services exist to solve that problem […]