Occasionally I've come across a reference to a scientific instrument makers having a micrometer thread cutting machine. Is this any different from a precision screw cutting lathe?
Is the material from which the spindle of a micrometer soft enough to turn? I'd like to modify one to have truncated cone shaped tips (like a Starett 210) for measuring the distance between watch balance jewels.
Clearly I need to avoid the type with carbide anvil/spindle tips, which seem to be the ones most frequently found second hand, but I imagine older ones may have lacked this refinement.
Alan