Mind your language and don’t lose your temper
Having had some bad experiences with drill bits recently, I was doing some research to figure out what sort of replacements I ought to buy. Reading over some hints published by a drill-bit manufacturer I was surprised by the statement that mistreating some high-speed steel bits could make them “lose their temper”. The surprise at seeing that common expression used in a discussion about steel was quickly followed by equal surprise that I had never before realised where the expression had come from. To me, losing your temper has always been the same as “doing your…