Thread grinding gauges

[trapper23]

Does anyone know a source for angle and pitch gauges so that I can grind my own thread cutting tools for use on my lathe. Enquiries to some of the tap and die suppliers have resulted in ludicrous cost quotations eg a gauge for 1/4 NPT £527 + vat !!!! est result would be a set of drawings which i could have accurately drawn up into etching transfers then i can make my own

Anyone got any thoughts...... I'm particularly after acme threads i know the angle is 29 degrees but pitch is the problem

[Okapi]

Hi,

It's not very well explaind what you need.
Is it the steel piece with the form of the thread cutting tool ?

[trapper23]

yes that's the one i just need the grinding gauge for the tool

[Okapi]

If it's what you have on the second picture, then it's a very usual tool, you can found it by every sellers of material for the lathe.
The first one is a very fine tool for extreme precision, but I don't know if you can found it on the market, normally it is selfmade.

[trapper23]

Yes its the second one I'm after but I need one with the NPT thread i can easily get the larger acme metric and imperial sizes but the NPT thread here in UK seems to be not readily available bsp thread is more common here . I can buy tap and dies for NPT. I'm also having difficulty in getting info on 1" X 8 tpi dies or gauges. My thought is I'm looking in the wrong places

[Okapi]

You can eventually ask them if you are loooking for something special, they are specialised in threading products.
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[trapper23]

Hi again,

Thanks so much for the link. Before i contact them i@ll make a schedule of the items i need.
Thanks again