On 11/05/2017 04:07 AM, Gene Heskett wrote:
And where can I src from here in the US, a decent quality, 10mm 1.5
pitch, solid carbide spiral machine tap? Ebay's search engine and the
sellers have no clue that there is a difference between HSS and carbide,
using both words to describe the same item, nor what the difference is
between a spiral tap and a spiral point. And neither do the sellers. :(
Geez, I sure wouldn't spend money on solid carbide taps!
Those must cost a LOT! If the material is hard, why not
thread mill it? There are single-row thread mills that can
be used over a range of hole sizes. I've got a 1/4" solid
carbide single row thread mill from Micro-100, probably cost
about $100 today. But, it will do a wide range of thread
pitches, and from anything it can fit into up, in diameter.
I've only used it a few times, but where a tap won't do for
some reason (or you have an oddball thread pitch-diameter
combination) it is great. Takes VERY little power, no need
for spindle sync, but it is a bit slower than tapping.
Jon
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