Whirl Thread cutter

[Smrkoul]

Hi,
can somebody recommend me whirl thread cutter for hardened steel?
I found only for stainless and titaniun: http://www.zecha.de/html_en/whirl_thread_cutter.html
Thanks

[78nova]

The name you mentioned " whirl cutter " I believe is a trade name for that specific brand of cutter.

Before this, I had never heard of whirl cutters. Your link showed them being used in the dental field.

Check out Scientific Cutting Tools website, www.sct-usa.com

We buy our thread mills or thread hobs as we call them from them.

We are using solid carbide spiral fluted thread hobs with TAILN coating in 15-5stainless with good results and tool life. These work well in stainless so they should work well in your hardened steel. Our tools are set in shrink fit holders.

You never mentioned what size threads you were cutting?

[Smrkoul]

YES, :-) "Single profile thread cutter"
Our company is specialized in EDM machining. We have HSC mill for making electrodes and direct milling of hardened steel.
I am looking for faster way how to make thread in hardened steel than EDM.
I tried drill up to 65 HRc from FRAISA and it works excellent, i have also tap for 60 HRc, but dont tried it yet, because i am affraid of tool breakage.
I have experience with single profile thread cutters in aluminium (Zecha tool). It is absolutely safe to make thread and tool is more universal (internal, external, i also used it for making grooves with undercut), so this is the reason why i am looking for coated variant for hardened steels of this tool.
In the most cases we make therads from M6 up to M8.