Introduction Every other manufacturing method adds material or reshapes it. Machining does the opposite. It starts with a solid block and removes everything that is not the finished part. Michelangelo supposedly described sculpture the same way the statue was already inside…

Introduction A car body panel is stamped for the first time on a Tuesday morning, and it comes out right. That sounds unremarkable until you consider what it means. The die that formed it was designed, its springback predicted and compensated…

Introduction A factory has a fifteen-year-old machine. A plastic guide bracket inside it snaps. The manufacturer stopped supplying spares for that model five years ago, and the machine is now down. There are three options. Wait weeks for a machine shop…

Introduction Every manufacturing process covered in engineering so far starts with more material than the finished part needs. Machining cuts metal away as chips. Forming pushes it into shape. Casting pours it into a mould that already defines the outer surface….

Introduction A CNC machine will cut whatever the program tells it to, with complete precision and absolutely no judgement. If the program says drive the spindle into the vice at rapid speed, it will do exactly that. This is why the…

Introduction A skilled machinist can turn a shaft on a manual lathe to within a couple of hundredths of a millimetre. Give the same machinist the same drawing tomorrow and the part will be very slightly different. Give it to a…

Introduction Rub your palms together hard and they get warm. Keep going and they get uncomfortably hot within seconds. That is friction converting mechanical work into heat, and it is a nuisance in most engineering the thing bearings and lubricants exist…

Introduction A pharmaceutical plant and a steel mill are both manufacturing. One runs in a climate-controlled clean room where a speck of dust is a serious incident. The other pours molten metal at 1,500°C into moulds under an open shed. Same…

Introduction In 1750, a skilled worker could produce one pair of shoes in a day. Today a single automated line turns out thousands, and nobody on that line has ever cut leather by hand. Getting from one to the other took…

Introduction Give the same simple metal bracket to three different plants and you will get three different answers. One will pour it as a casting. One will press it from sheet. One will cut it from a solid block on a…