AUK tooling manufacturer has adopted gun-drilling as part of an integrated machining cycle on a Mazak J-200 Integrex multi-tasking turn-mill centre as a replacement for the sequential application of conventional twist drills to produce 3.2mm-diameter × 145mm-deep coolant feed holes in M2 tool steel. As a result of adopting the recommendation of Chessington-based Mollart Engineering (www.mollart.com) to incorporate gun-drilling and change to a single-cycle drilling method, cycle times and lead times have been significantly reduced - and quality has been improved. In fact, rejects and scrap have been totally eliminated, as straightness is now held to within 0.25mm TIR.
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