GB Precision sometimes uses gun drilling as part of its machining strategy, even when it is not the most obvious solution. On one recent occasion, the decision to use this technology resulted in the reduction of components in a tool set from three parts to one – resulting in considerable cost and time savings for the customer.
Gun drilling produces deep, straight holes, and has its origins in the manufacture of gun barrels, but, even though it is now quite widely used, particularly in the oil and gas sectors, GB Precision believes it has plenty to offer in other situations, including prototype and pre-production work for the aerospace and medical sectors, as well as for engineering mould tools.
Gun drills differ from conventional drills in several critical respects; in their single cutting edge head geometry, in their use of guide pads to maintain hole-straightness, in the insertion of high pressure coolant through the spindle and gun drill centre and the removal of chips through a groove on the outside edge of the drill. Together these attributes create a process that has been developed and refined over many years.
As Director Paul Turner says; “One of the reasons we choose to use gun drilling is the extreme precision we obtain – it completely solves the issue of drills wandering during the machining operation. For this reason, we have used it to drill holes through narrow sections, close to walls or other embedded features.”
For GB Precision gun drilling is just an additional useful weapon in its armoury of techniques, technologies and skills that can be brought to bear on the – usually very challenging – job in hand.