Alan B
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| posted on 3/4/07 at 02:03 AM |
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Home made bushes
I finally got round to casting some bushes from polyurethane (shore 80A)..turned out pretty well...
 
Bushes
[img][/img]
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t.j.
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| posted on 3/4/07 at 06:19 AM |
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Ik like to see how nutty we are 
Nice job, everyone is using optimal their skills.....
so i bought mine (steel-ones from a peugeot 205)
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miegru
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| posted on 3/4/07 at 07:47 AM |
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Fantastic. Haven't heard of someone doing this themselves.
What's involved in doing this? Special equipment needed? Is machining needed after casting?
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Mr Whippy
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| posted on 3/4/07 at 08:28 AM |
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hmm very impressive, but why do this when you can get them off the shelf?
Is it to get just the right hardness?
Fame is when your old car is plastered all over the internet
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Alan B
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| posted on 3/4/07 at 12:13 PM |
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Thanks guys...a few answers.
No special equipment needed, just a mould to pour the liquid into.
No machining required after casting, you just figure out the size you want up front.
I couldn't get the size I wanted off the shelf, and I HATE machining the stuff hence my motivation to do it this way.....once the mould is made
it works out pretty economical.
Yes, you do have some choice of hardness but that wasn't a major factor.
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Peteff
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| posted on 3/4/07 at 12:22 PM |
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My nephew does something similar, he makes false teeth He can get two part mix for the pu and it must be cheaper than buying them for £1.55 per
half bush.
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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Alan B
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| posted on 3/4/07 at 12:30 PM |
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Pete, yep it is a huge amount cheaper than that..if you calculate the volume needed pretty accurately there is very little wasted...a one pound tin
makes a LOT of bushes.
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James
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| posted on 3/4/07 at 01:19 PM |
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Christ! Don't let Trueblue see this....
it'll be his next thing after his finished vulcanising the DIY tyres!
James
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"The fight is won or lost far away from witnesses, behind the lines, in the gym and out there on the road, long before I dance under those lights."
- Muhammad Ali
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sgraber
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| posted on 3/4/07 at 02:53 PM |
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Looks like you're gonna be my one-stop supply shop! Yesssssss!
I currently buy mine from a local off-road shop. I then have to machine them to fit my application. It just takes a long time and is very messy. So if
you're going to stock up.... Let me know!
Steve Graber
http://www.grabercars.com/
"Quickness through lightness"
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pewe
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| posted on 3/4/07 at 04:28 PM |
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Sounds as if you're onto a fledgling business and providing the market is there go for it. Can't beat a low cost, high margin product
no-one else has thought of!
Cheers, Pewe 
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andyd
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| posted on 9/4/08 at 09:20 AM |
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Alan, a few Q's...
What exactly is the process involved to "mix your own"?
Any clue where in the UK the materials/powder or whatever could be obtained from?
What's the cure time?
Does it require heat application or just time?
Were you just careful to pour the liquid into the mould to minimise bubbles or did you have a way of expelling them?
Any other "tips" that you can offer as this seems like a pretty easy DIY thing (once the mould is made obviously).
Wouldn't mind having a bash myself as I've looked for pre-made rod to turn my own but can't seem to find the right stuff. 
Edited to say... I've found
this stuff on eBay. Would this be good stuff to use?
[Edited on 9/4/2008 by andyd]
Andy
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jono_misfit
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| posted on 9/4/08 at 02:42 PM |
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If you type casting polyurethane into google you get the same kit at half the price.
http://www.tomps.com/shop/polyurethane-fast-cast-resin-p-129.html
http://www.notcutt.co.uk/polyresins.html
[Edited on 9/4/08 by jono_misfit]
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andyd
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| posted on 9/4/08 at 03:15 PM |
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Ah but the eBay ones *are* from Tomps and are subject to VAT on top of their website price?
Perhaps... maybe, I've not checked before posting though.
[Edited on 9/4/2008 by andyd]
Andy
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IDONTBELEIVEIT
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| posted on 9/4/08 at 06:10 PM |
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alright alan b do you need any release agent,do you get much shrinkage,if so how much cos i'm gonna make the mould and die shortly
regards wayne
Are We There Yet, Are We There Yet!!!!
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Alan B
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| posted on 11/4/08 at 09:05 PM |
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Hi Guys...a few answers/observations..
The mix is two liquids.....no heat required
Shrinkage is fairly minimal.....not enough to bother about.
I did use a release agent...just sprayed it on the mold.
Cure time is about 24 hours I think.
To avoid bubbles I pour very carefully in a thin stream...it seems to work.
Alan
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