We use multi-spindle gun drilling machines that work 24 hours a day, 7 days a week, 52 weeks a year with 2 days off for Christmas.
Our computer specifications are measured to within 100ths of millimeters to get the best possible hole pattern everytime.
To create a hole, it is a one operation pass. This means we do not pre-drill a hole and then ream it. We use a gun drill tool that has a fine hole drilled down the centre. High pressure oil is then injected to the head of the gun drill to produce a mirror finished hole.