Thread: Anyone want to do a small job on the side?

Ok, the background is that I am modifying my car and I am planning to build some new hoses using AN fittings.

These hoses will screw onto an adaptor which is AN-10 on one end and and male BSP or NPT the other.

What I need is someone to make up a couple of stainless weld on bosses which are drilled then threaded with either 1/2" BSP or 1/2" NPT.

I would prefer NPT as most of these fittings are based around the US system and BSP means I will have to buy from the special Aus range, which is dear as poison.

The boss would need to be say 5mm longer than the thread needs to be so I can carve the end to suit the contour of the pipework it will be welded to.

Other than that, no special requirements. Would be nice to keep OD to a minimum and run a little chamfer to make things neat.

Anyone interested?

Hi Browny,

I'm not interested myself but a drawing of exactly what you want maybe a good idea - a picture is better than a thousand words as they say. I've done the odd job in the past when given to the buyer he would say "that isn't what I wanted". So nowadays they don't get the job done unless they give me a picture (or drawing) with the dimensions on it.

MH

ok, this is what I want...



The above is aluminium,threaded 3/8BSP. I want the same thing in stainless, threaded 1/2NPT.

I'd be happy to do it but don't have a 1/2" NPT tap.

Originally Posted by hux

I'd be happy to do it but don't have a 1/2" NPT tap.

Come on Craig, the tap is only $20 to buy, what is that between friends. I'm sure Brownie is not expecting you to do it for nothing?

MH

Actually I think I've just found some BSP adaptors and even the possibility of some weld on AN male nipples in SS, which would eliminate the need for bosses and adaptors altogether. Will find out more tomorrow morning.

Oh and of course i'm not expecting this to be done for free.

Originally Posted by browny

Oh and of course i'm not expecting this to be done for free.

So what do you think is a fair price to do the job now? So once again WHAT do you exactly want doing? What are the dimensions between centres? Are they to be 180 degrees to one another? What thickness of tube are you requiring?

Maybe once you have answered some of those questions may you get a bit more interest.

MH

Honestly, it is as simple as a piece of round stock with a NPT threaded hole in it....this is not a precision part, just a simple boss that would be welded on and then something screwed into it.

Something roughly like the picture I posted above would do. About the only way I can see to stuff it up would be to get the thread size wrong.

I would make them myself but I would need to buy the drill bit, the tap, stuff around finding some stainless, which I will probably have to buy 10x more than I need, and then try to drill a straight hole down the centre (which I am not set up to do).

So I posted on here hoping that someone might want to make a few bucks from some scrap they have lying around. If that's not the case then I am not going to cry about it.

WRT to cost, I don't know. For $60 I can get a SS AN male to male adaptor that I can cut two nipples from which would cut out the need for an adaptor altogether. Which is tempting.

Browny

You still haven't said how long they have to be?

The hard thing with machining is operating off a well about that long and about so round would be good description. Makes it hard to determine whether your want to do something.

I guess for me, to buy a tap I don't need or particularly want then do the work, supply the material and ship it, I think it is sort of cancels out the cost effectiveness compared to your AN adapter. (My normal supplier's website is down but another is quoting $46 for a 1/2" NPT tap - NPT isn't common here - BSP is.

Originally Posted by hux

Browny

You still haven't said how long they have to be?

The hard thing with machining is operating off a well about that long and about so round would be good description. Makes it hard to determine whether your want to do something.

I totally agree with you Hux - Sorry Browny but I do make precision items at work for the Australian airforce and navy. We make amongst many things dummy torpedo's & bombs that are used in real jet fighters Hornets and Collins classed submarines. So I am not used to someone coming up to me with a rough sketch on the back of a fag packet. I have plenty of SS and taps/dies to do what you want but it doesn't look like I will be doing it for you with a poor attitude like that - you just shot yourself in the foot boyyo.

As per my very first post, they would need to be long enough to take a NPT thread, which going off 1/2 BSP, would be about 20mm long. Add another 5mm allowance to shape the back if neccesary. I'm sure someone who knew NPT or had a NPT tap on hand (ie the sort of person I was hoping might take this on) would be able sort this out straight away.

Hux, no worries. I know NPT isn't common here. Unfortunately these fittings originate from the US where everything is NPT. My enquiry is obviously more suited to someone who already has access to a NPT tap. As soon as you are buying tooling you're pretty much in the same situation as I am.

Metal Head, your first post indicated you didn't want to do this anyway, so exactly what am I missing out on? All you seem to be trying is to stir me up, and congrats, you have succeeded.

Cant you just buy a 1/2" npt socket and cut it in half and shape to suit your pipe work.

That is one of my backup plans, however nothing will be stocked locally and last time I did this it turned out pretty expensive because I think they charged freight on top. Plus the local hose place doesn't like doing counter sales so they are a bit of a pain to deal with.

If it came to this I would be better off to go for the stainless hose fittings instead. Maybe marginally more expensive but a neater solution.

Browny you can get 1/2 or full 1/2" npt couplings in Newcastle for $10 plus gst,the 1/2 couplings are 24mm lng and full 48mm lng.(these are $10 +gst each)

I am not sure of your application or your requirements re ascetics or strength but could it be as simple as welding a nut on? or a nut into a tube and welding the tube on?