V-strut for Skeletal bracket

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NaughtyBits
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V-strut for Skeletal bracket

Postby NaughtyBits » Sat Dec 30, 2017 3:31 pm

Thanks for any help locating one.

Have a good one.

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Oyster 49
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Re: V-strut for Skeletal bracket

Postby Oyster 49 » Sat Dec 30, 2017 6:09 pm

I'll look closer at mine, maybe somebody like Nudge will be able to cast one?
Last edited by Oyster 49 on Sun Dec 31, 2017 12:33 pm, edited 1 time in total.

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NaughtyBits
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Re: V-strut for Skeletal bracket

Postby NaughtyBits » Sat Dec 30, 2017 7:10 pm

Thanks Oyster/Nudge - if someone's willing and able.

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Oyster 49
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Re: V-strut for Skeletal bracket

Postby Oyster 49 » Sun Dec 31, 2017 12:36 pm

I had a closer look last night. The V strut could be made I suspect from some brass plate, with some assistance from a milling machine. The original is cast however, so it would not be easy to create a perfect match by machining. However a replacement could be made by a skilled miller.

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Nudge
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Re: V-strut for Skeletal bracket

Postby Nudge » Mon Jan 01, 2018 6:01 am

A drawing and 3d printed pattern for a casting may work... the cost of shipping?
Is it better to over think, than not think at all?

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Oyster 49
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Re: V-strut for Skeletal bracket

Postby Oyster 49 » Mon Jan 01, 2018 12:26 pm

This is where it starts to get difficult, as the demand is possibly only for one or two parts at best. I suspect making one out of brass plate by hand on a mill might be the quickest and easiest option?

I came across this when making new bayonet caps, I made some and the demand evaporated when it came to parting with the cash...I have a couple left and still have not quite recovered the costs, not that I'm particularly bothered.

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Charles uk
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Re: V-strut for Skeletal bracket

Postby Charles uk » Mon Jan 01, 2018 4:33 pm

As the A-strut is a sand cast item, what would seem the most obvious answer, is that we provide a 3D printer suitable drawing, that could be downloaded anywhere in the world, where there is a brass/bronze sand/casting foundry & a 3D printer.

Oyster are you still in the UK & do you have access to an XRF at work? if the answer is yes to both, could you let us know what this strut is made from, so we can get the clones looking the same color, & I can calculate, the shrinkage allowance for the drawing/pattern.

We can hardly stitch up the Nudges of this world, with a weekends worth of work, for something he doesn't need!

Manually milling one from a bronze billet, would require probably £40 for material (guesstimate) & 4 to 5 hours machine time on a Bridgeport with a DRO & a rotary table, all for a 225 gram item.

Sorry about the dreadful picture!
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Make it idiot proof and someone will make a better idiot.

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NaughtyBits
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Re: V-strut for Skeletal bracket

Postby NaughtyBits » Mon Jan 01, 2018 8:26 pm

That would be extremely helpful, if the 3D drawing to be printed & cast turns out not to be too much trouble - thanks fellas.

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Hugz
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Re: V-strut for Skeletal bracket

Postby Hugz » Mon Jan 01, 2018 9:05 pm

Yes. I'll second that.

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Oyster 49
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Re: V-strut for Skeletal bracket

Postby Oyster 49 » Tue Jan 02, 2018 12:40 am

Charles, sorry, no and not sure to your questions :P We do have a small lab that do analysis of engine oil system findings. I’m not sure what equipment they have there, and most stuff has to go off site to a university lab for analysis.

I think the part is bronze alloy of some sort.

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Charles uk
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Re: V-strut for Skeletal bracket

Postby Charles uk » Tue Jan 02, 2018 1:32 am

I've never seen a Seagull drawing for anything that early so have no idea of what sort of bronze they were using in the late 40's.

Nowadays I don't know anyone who has access to an XRF, so I'll just have to visit my local bronze foundry, they do giant bronze planters & the BAFTA awards & see what they recommend for the shrinkage allowance.
Make it idiot proof and someone will make a better idiot.

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Nudge
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Re: V-strut for Skeletal bracket

Postby Nudge » Tue Jan 02, 2018 10:02 am

The shrinkage of bronze is anywhere from 1.05 to 2.1 %
The main area that will need to be correct will be accross the pins. The last thing you need is to spend all day making a part only to find out it is too big and you cant fit it inbetween the bracket or too small and it drops out!
Is it better to over think, than not think at all?

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Oyster 49
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Re: V-strut for Skeletal bracket

Postby Oyster 49 » Sat Jan 06, 2018 11:43 am

So a cast basic shape with a little machining to size?

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Charles uk
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Re: V-strut for Skeletal bracket

Postby Charles uk » Sat Jan 06, 2018 11:54 am

A basic cast shape, finished with a sanding disc & a hand file!
Make it idiot proof and someone will make a better idiot.

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Oyster 49
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Re: V-strut for Skeletal bracket

Postby Oyster 49 » Sat Jan 06, 2018 12:09 pm

Yes, either way would be good, as long as you don’t overdo it.

Interesting stuff, when you get into remanufacturing 8)


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