Member postings for Mark Vincent 1

Jim, Thanks for your help. They look about the same. I'll have to attempt a more accurate thread count to get it accurate. Looking at a different model I'm getting 10 threads per quarter of an inch, so that would indicate a pitch of 40 tpi. also it does look like a fine thread. I'm based in Macclesfield, Cheshire.

Hi, thanks for the information and questions so far, clearly more complex than I first thought. I have added 4 photos here. Three of the models and one close up of the air input. I have checked the other 10 models that I have and the input is exactly the same on all of them. The diameter of the tread is about 6.4mm, which is a quarter of an inch. There are about 7 or 8 threads in 0.2 of an inch so thats 30 to 40 per inch if that helps. Any advice on what to buy to connect them to a small air compressor would be much appreciated.

I have inherited several small engineering models from my late farther-in-law. I'm guessing that he inherited them too, so they are probably in the region of 40 to 50 years old. It looks like they run on compressed air and the input valve/fitting looks something smaller than a car tyre input valve. What do I look for in terms of a small air compressor and what is the specification/type/name of the thread on the input valve? It doesn't;t need to be massive, I'm happy to run them one at a time just to see them in action.

If I could work out how to do it I'd ad a couple of pictures.