I'm going nuts! (vol 2)

[allegro]

Anyone know where i can get some hollow steel hex bar?

Ideally it would be stainless or at least rust resistant with the internal shaft an appropriate size to tap for an M10 thread.

My top secret pension fund is on the verge of collapse if i cannot source some steel somewhere

Thanks guys

[Bill]

Ok, I'm curious - What's it for?

[Bill]

If 30mm isn't long enough (that seems to be extension nut length) you could probably get some bar from an extension nut manufacturer.

http://www.1mta.com/product.php?id=967

[Ledaig]

It can be obtained, just google hollow hex bar to find suppliers - but it will not be cheap unless you can find an offcut or a bar which has been deformed,(Most of these bars will be long lengths which would be machined on multispindle lathes - hence a bent bar cannot be used).

Otherwise.......

1) How long does it need to be?

2) How Deep does the thread need to go?

3) Does anything pass from end to end?

Would the following be possible when considering the above:

Take a length of standard hex bar, machine a male thread, attach an extension nut as mentioned above.
And finally, attach whatever it is to the free female end of the extension nut.

The above does of course require the answer to No. 3 to be No!

[freecar]

For an M10 thread you need a nominal hole of 8.8mm if I remember correctly, you can use say 9.0mm but the thread wont be as deep so wont have the same strength.

http://cgi.ebay.co.uk/12mm-OD-x-1-5mm-Wall-9mm-ID-...

Try this guy, this tube would work albeit with a terrifyingly thin wall thickness.

Try searching for 9mm ID Tube (Internal Diameter)

[allegro]

Thanks for the input guys. For those who didn't see my previous thread ideally i am looking to buy something very similar to an extension/coupling nut but it needs to be 90mm long, hex shaped, rust resistant and an M10 thread either all the way through or at least 40mm deep or so.

I have tried all sorts of variables, the last being hex shaped turnbuckles but so far the very few hits i have had have been quite expensive and custom made.

I need to keep costs as low as possible and need a bulk-ish amount. The bent off cuts of hex bar/pipe might be a good idea though at the moment i cant seem to find a supplier who do hollow hex bar in steel, only brass seems available.

Apologies for the rambling post.

[Bill]

Well, if I'd known you had a previous thread...

Have a look at rigging screws the centre part looks like it might be what you're after.

[allegro]

Cheers Bill.
I have come across a few such sites in my long nights searching but the turnbuckles always seem to be a cylindrical shape with tapered ends I unfortunately need it to be a hex bar shape.

[Bill]

Ah, so that's what a turnbuckle is

Fencing tensioners any good? I guess they tend to be open sided.

[allegro]

Bill said:

Ah, so that's what a turnbuckle is

Fencing tensioners any good? I guess they tend to be open sided.

Yes

[Bill]

And presumably the threads are reverse at one end.

[Bill]

What sort of prices have you got so far?

And have you had a word with PHer mel?

[allegro]

Appreciate the persistence Bill, a left hand thread at one end wouldn't be the end of the world.

The best price i have had so far was around £8 each but could do with them being at least half that if possible. As i say, my quotes were for custom stuff hence the price (which i guess is quite reasonable) but what i really need is something off the peg i can subvert from its intended use.

Edited by allegro on Friday 14th May 17:15

[Bill]

allegro said:

appreciate the persistence Bill.

The worst thing is I do actually have either a home to go to or work to do

Someone's calling me back on Monday with a price.

[allegro]

Bill said:

allegro said:

appreciate the persistence Bill.

The worst thing is I do actually have either a home to go to or work to do

Someone's calling me back on Monday with a price.

Top Bloke

If this little pension plan pays off expect a crate of beer or two on your doorstep

[jimmyjimjim]

Having had a bit of a dig around (though clearly not as much as you have had!), I've reached the conclusion that you're going to be very unlikely to get anything off the shelf that'll do.

Primarily because DIN 6334 states 30mm length for M10 couplers, so pretty much everything off the shelf will be for this standard.

There's various Chinese, Indian and other places that appear to be happy to quote for bulk (some for 1000 pieces, some with a minimum order of 5 tonnes, which could prove a few too many!), but I suspect that their lead times might be a little too much for you.

So, I think you're going to be looking for a friendly local engineering company who'll knock some up for you. They'll be able to get the apppropriate hex stock in, drill and tap it, without great difficulty.

This guy might be able to help, or hopefully point you in the right direction:

http://www.ekpsupplies.co.uk/index.php

His stuff is usually smaller, though.

[allegro]

Cheers JimmyJimJim i will check it out

[Bill]

Dunno how you're getting on but the guy i called got back to me with a quote of £5.99 a piece. Let me know if you want the contact details.

[Simpo Two]

Hollow steel hex bar - you're building a Hawker Hurricane AICMFP!

[allegro]

Cheers Bill, glad to see there are stil a few good folk who will lend a hand left in the world.
That price matches some of the quotes ive been getting but would eat into any profits i may make.

Got a company from the states getting back to me tommorrow with a price which im hoping will be favourable, the imperial stuff they do seems well priced so fingers crossed.

If you ever find yourself in Manchester Bill let me know, i know a few choice establishments with fine ales!