Question:

I am making screws in 1/8” mild steel.
I will drill a small hole in the metal. Then heat it to red & punch a hole the size needed to put a screw in it.
(1)   I understand that after the metal cools down the hole will become slightly larger & the punch will come out easier. Is this correct?

(2)   In the code can I put in a delay of 15 seconds before the CNC machine goes to the next hole, so I have time to heat up the next hole?   What is the code?

(3)   I need a router that runs very slow & powerful to make the screw threads. Is there a router out there & where I can buy one?

(4)   I then need to make the screw threads with a cutter that doesn’t cut the screw threads just forms it.  Where can I get one?

Thanks for the help
Rkjohn

I'd look at flowdrill.com first as it may save you a bunch of work. I have seen this demonstrated at various shows using a drill press so it should work great on a CNC.

Just an FYI, thread forming cutters are generally only used in soft metals like aluminium, generally you would cut a thread in steels.

I think the code for a delay would be G04 P15.00