Where to buy that adapter female 16x1.5mm / male 1/2 NPT

[Boyan Silyavski]

Hi guys,

i believe i mislead you, also due to a lack of sleep

The connector is smaller than the m16x1.5 chinese connector.

I was browsing some forums for an answer and somewhere i read that 1/2 NPT is the standard for the american made plasma machines so i assumed without thinking it further that this is the case here. Cause the Thermal Dynamics universal torch sells or in ATC Connection or in something called O2B Connection . I bought mine with the ATC connector which is proprietary, looking something like a Mig Euro-plug and additionally bought the short adapter which adapts it to something which i assumed was the 1/2 NPT

Now here are some photos, the thread seems similar like the 1.5mm thread but this i can not confirm as i dont have all thread gauges and the ones i have dont enter properly so its difficult for me to judge.

Maybe hopefully its some popular thread. Now my bad was that i went to industrial shop and there was a fitting that almost fit at the side of the hose, but i did not ask him which size was, as i was still under the 1/2 NPT impression.


Right photo is the new one, left is the bigger Chinese 16x1.5mm


PS.Just checked again with the thread gauges i have, the thread seems more near 1.25mm size or 20G 1/4 BSW

[m_c]

Going by the hydraulic fitting chart I have, inside diameter of 12.5mm would likely be M14x1.5, or 12.9mm would be 9/16"-18 UNF. The chart only covers BSP, UN, NP and Metric threads though.
.
However going by the charts here - http://www.motalia.com/Html/Charts/thread_charts.html, the only thing near given the ID and pitch, would be 9/16"-18UNF, which given the American origin, I'd say is the most likely.

[Boyan Silyavski]

Thanks for that.

Arent they bastards. I read this evening that american companies, like Miller and so tend to use metric or rare threads. Why? To f___ck their customers and discourage them from "this fits to that"

9/16"-18 UNF, i hear for that one for first time in my life :-). I also concluded that that M14 is a worthy candidate. As there are some Chinese adapters on the market that fit China plasma torches to 14x1.5 machines. Unfortunately the opposite to what i am going to do.

Will go tomorrow again to the local industrial supply to see what was the one that fit. A bit shameful having a lathe and don't know how to make the adapter myself , but don't have the time to dig into that

[Boyan Silyavski]

Ok. I found it. It does not show from ebay search from Spain . Fortunately found it from the .com site . Item number 251342793854, 4.50$ . Just ordered it.

I hope that's the one. If not i will brutalize it and make it fit

[mekanik]

A lot of Companies use special(odd) size threads so you are tied into buying there spares.
The fitting shown should be fine if its got a cone in the M14 end and if not that's easy enough to do on your lathe.
Mike