shortie
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| posted on 23/3/04 at 09:55 PM |
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Shot Blasting
Took my donor parts to be shot blasted tonight but was told that it would not be the best idea due to the fact all the shot\grit would get in the
bearings\holes etc.
He said that alot of the bits would be ruined by shot blasting.
Have others had similar problems?
Rich.
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Mark Allanson
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| posted on 23/3/04 at 10:49 PM |
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The guy is right, strip everything down to bare castings, and protect machined surfaces with old inner tube before blasting
If you can keep you head, whilst all others around you are losing theirs, you are not fully aware of the situation
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Hugh Paterson
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| posted on 23/3/04 at 10:53 PM |
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Rich the shot can be quite destructive, more like he could not be bothered to bung up all the holes that migh clog up or bearing seats that could be
damaged,if u want to try again suggest hardwood bungs to seal areas like that prior to shotblasting the exterior faces. Either that or elbow grease
and a wire brush. Another option is an Acid bath, anywhere that does galvanising might dip them in acid for you for a small fee Your too far South
for me to do them for u
Shug.
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andrew-theasby
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| posted on 24/3/04 at 12:20 AM |
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I agree i used dense foam bungs but was blasting them myself so was careful not to blast the foam away. Someone else might not be so careful! Dont
touch them with bare hands afterwards either get some paint on them straight away or plating etc or theyll be rusty again in no time.
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ceebmoj
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| posted on 24/3/04 at 09:20 AM |
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Another thing you might want to try is electrolysis have a search in the forum and you will find a couple of threads on it. However don’t uses
stainless steal as the electrode (it is bad for your health).
I get the best results from using a thin bit of sheet punched with a nail witch leave lots of raged holes in the sheet. A no brain reason for this is
that it is easer for the electrons fall out of the + chard bit of metal this way.
The piece of sheet you use will not last all that long. It takes me about 2 to 3 hours to clean some thing using this method. But the is little or no
effort involved.
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Ian Pearson
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| posted on 24/3/04 at 10:01 AM |
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Shortie,
There is a post here http://www.bhi.co.uk/hints/rust.htm
that may help you out. I have found that it takes a little longer than I thought, the results are good, but a little messy!! Failing that, there is a
guy in Broadbridge Heath who will sand blast small-ish bits and get them powder coated for a reasonable price. I don't have the number on me but
if you are interested, I may be in Horsham either tomorrow or the day after, and can get hold of the number for you.
Regards, Ian.
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James
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| posted on 29/3/04 at 01:42 PM |
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DON't USE STAINLESS
IMPORTANT: Whatever you do, don't use a piece of stainless with the above instructions.
There are posts about this elsewhere but basically it gives off some nasty chromate gas.
Craig looked into this quite a lot- ask him!
HTH,
James
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