On Mon, 25 Mar 2013 14:59:19 -0600, "Pete C."
wrote:


Physically they are a comparable size and material quantity as a similar
tap or similarly sized end mill, only the geometry of them is really
different. Since all these tools are presumably produced on the same
multi axis CNC grinders, why the cost difference? Is it just because
they are newer technology?

Why can you not get a HSS thread mill, all I want to cut is 6061
aluminum.


Thread mills are used in "aerospace" work, that jacks up the price a
bunch.

Only used them once to cut big threads on a brass part, sold them to
my customer as part of the deal. 11.5 TPI NPS was a bitch to find.

Remove 333 to reply.
Randy