Micro-Engraving Bits: Why Fine Carbides Fail on 2mm Text

When Daniel bought a Dremel 7760 for engraving PCBs and plastics, he expected asthma and dust to be his biggest problems. Instead, the real puzzle is bits — why fine carbides produce chicken-scrawl on 2mm numbers, and how to actually get clean results. This episode unpacks the counterintuitive geometry of micro-engraving: why a 0.1mm V-bit fails at larger text, how runout makes tools lie about their cut width, and why single-flute bits solve the HDPE fur problem that multi-flute bits create. We explore the practical hobbyist limits (0.5mm for legible text), the extreme outer limits (Graham Short engraving 6-micron letters between heartbeats), and the surprisingly simple fix for clean numbers — use a wider bit for wider strokes. Episode #955493 — open it directly at myweirdprompts.com/955493