I need to drill approx. 120 3/4" holes into sheet metal, specifically, into sheet metal from an old clothes dryer cylinder. (Pretty thick and stiff as far as sheet metal goes, but less than 1/8" thick ...

Almost any general-purpose twist bit will do a decent job of drilling holes in metal. In fact, most drill bits labeled specifically for metal are manufactured to drill through various materials, ...

In sheet-metal fabrication, parts are formed from metal sheets by punching, cutting, stamping, and bending. 3D CAD files are created using a host of different CAD packages and then converted into ...