pilot punch

pilot punch

A machine punch in which the cutting tool is provided with a small central plug which fits into a hole in the material and acts as a guide for punching a larger hole.
References in periodicals archive ?
CPR in Montreal became the key operational centre for the plan and veteran bush pilot Punch Dickens was assigned the job of hiring volunteers.
The manufacturer offers a line of ground perforators, close space punches, punch blanks, stepped punches, ejector punches, pilot punches, bevel-headed punches, core pins, mold pins, nitrided ejector pins, EDM die blanks, precision die buttons, tool blanks, sleeves, and miniature tools and components.
Pilot punched engineer after an argument, causing the latter's nose to bleed ..
Emirates Airlines is in damage control after a flight with 275 passengers and crew came within seconds of a disastrous crash at Melbourne Airport because a pilot punched the wrong numbers into a computer.
"The pilot punched off his wing tanks which exploded on the runway."