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UNISIG a world-class manufacturer of deep hole drilling systems and technology, bring powerful and intuitive capability to their industry-leading customer across the globe.  UNISIG machines are engineered to handle a complete range of applications with confidence, and supported by their high level of knowledge and service.





Deep hole drilling is a highly sought after process across several applications and multitude of industries in Oil & Gas, Energy, Military, and Aerospace.  Deep hole drilling consists of BTA drilling and gun drilling, with additional processes designed for specific tolerance objectives and generally performed on BTA-style deep hole drilling machines. Deep hole drilling is used in a variety of materials from aluminium to super-alloys, and is capable of achieving tight diameter control, straightness, and superior surface finish into workpieces.

BTA drilling can achieve drill feed rates of typically 5-7 times faster than gundrilling at the same diameter, due to the tool design, more efficient chip exhaust, and machine design and power. BTA drilling machines introduce coolant around the tool head, and evacuate chips through the drill and machine spindle, compared to gundrilling, where coolant is introduced internally and chips exit through an external groove. BTA drilling is effective in holes from 20 – 200 mm [0.80 – 8.00 in], a greater size range than gundrilling.