JEPY
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| posted on 24/2/08 at 10:17 AM |
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Grit blasting advice
Hi
Does anyone know of a good website or book with advice on grit/sand/bead blasting? I've had a look on google and found a few corporate bits and
pieces but a no-nonsence guide would be good.
I've just got a new attachment for my compressor and been playing yesterday with aluminium oxide grit - nice results especially on cast iron
items.
Things I'd wished I'd known before I played:
The grit really does get EVERYWHERE (even when you think you contained/masked things up)
It uses a load more than you think
 can it be re-used???
Thanks
James
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madrallysport
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| posted on 24/2/08 at 10:26 AM |
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Grit can be re used, i have a small self contained unit, small parts only, the grit gets sucked up a tube into the gun and blast out, then falls to
the bottom of the cabinet and gets re-used. It does however need replacing every so often.
A mate has a system like yours and he use's it inside a old green house, still very messy but it helps.
UNDERSTEER is when you hit the wall with the front of the car.
OVERSTEER is when you hit the wall with the rear of the car.
HORSEPOWER is how fast you hit the wall.
TORQUE is how far you take the wall with you.
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fatfranky
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| posted on 24/2/08 at 10:27 AM |
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I'm no expert but have sandblasted a few bits myself, aluminium oxide is a good blast media but can be expensive, some people use kiln dried
sand but this is a big health and safety risk and can cause silicosis.
Yes you can re-use the media but it will become blunt in time, if using a cabinet it's fairly easy to gather up to recycle but if doing large
components not so easy. I've see commercial blasters that blast inside a shipping container and literally shovel up the media for re-use.
Yes, it does get absolutely everywhere usually including your nether regions!
Regards
Frank
Damn Too slow!
[Edited on 24/2/08 by fatfranky]
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big_wasa
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| posted on 24/2/08 at 12:14 PM |
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I used to use an old caravan 
As you say it gets every where.
To be honest I found that it was easier to let some one elts do it
Would be handy to be able to do the odd bracket on a sunday afternoon tho.
The media is or was cheap when I used to get it from a paint refinishers and not machine mart.
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JEPY
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| posted on 24/2/08 at 03:21 PM |
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Thanks for the info.. anyone got a good guide for when to use oxide vs sand vs walnut shell etc? and if any metals are sensitive to being blasted with
one particular product or not?
I'm wary of blasting thin metal or machined surfaces since I don't want to ruin anything - might give the diff casing a blasting during
the week!
I've built a temporary blasting box and thought I'd sealed it ok - the black snot in my left nostril says otherwise!! Better mask
required...
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NS Dev
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| posted on 26/2/08 at 10:03 PM |
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I have a pressure pot blaster (home made) and an unlimited supply of FOC glass bead blast media...............
still haven't solved how to keep it inside anything though!
I have a crappy machine mart cabinet, keep looking for an industrial jobbie which might actually work.
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
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