Drill 40mm thick Chrome Alloy Steel

[1Hector]

Casn anyone recommend a tool maker that can produce a drill bit or combination bit for drilling into 40mm thick Chrome Alloy steel pipe to facilitate a thermowell?

I cant get anyone at the moment that can sort this problem?

 

[SnTMan]

http://www.hougen.com/

 

[racookpe1978]

I've also used Hougen drills for even deeper, larger bore holes.

Their holes won't make "reamer quality" finishes, but they are fast and adequate for a thermocouple hole. You'll need a way to clamp the mag-based drills to the pipe.

What diameter thermocouple?