Shop made tap

The Photo Album is a place for "Shop Shots" as well as pictures and descriptions of projects that we are working on. Show off your Shops, Machines, and your Projects!

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Re: Shop made tap

Postby tornitore45 » Wed Mar 02, 2016 8:48 am

This is an old thread (pun not intended), I still have a question

I suppose the flutes were cut before the thread to avoid having burrs on the thread subjecting to the inconvenience of an interrupted cut.
Last edited by tornitore45 on Wed Mar 30, 2016 3:16 pm, edited 1 time in total.
Mauro Gaetano
in Austin TX

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Re: Shop made tap

Postby eeler1 » Tue Mar 29, 2016 9:22 pm

That is the question. Which came first, the flutes or the threads? And why?

Russ Hanscom
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Re: Shop made tap

Postby Russ Hanscom » Mon May 16, 2016 4:14 pm

For the one I made, threads came first, flutes last, otherwise, the threads tend to be uneven. A light past with a stone takes off the burrs.

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Re: Shop made tap

Postby Harold_V » Mon May 16, 2016 10:21 pm

The uneven condition of a thread so created can be controlled by placing a slight drag on the carriage while chasing the thread.

Still, the endless interrupted cut isn't in one's best interest. Best of all scenarios would be to grind the thread after the roughed tap was heat treated. A very unlikely thing in a home shop.

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