spring loaded pencil

[Eric Tailor]

Hi All,

When I was in shop class, we had a spring loaded pencil that was used in place of a milling cutter to prove out g-code (cnc mill). I'd like to get one of these to use with my cnc router. Any ideas where I can buy one? Thanks.

Eric

[TexasFireGuy]

I've seen spring loaded center punches, which may be what you're talking about, but never a spring loaded pencil.