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DIY, Homemade Media Blasting Cabinet

169K views 136 replies 32 participants last post by  JaCkHoLe  
#1 ·
After many delays, my sandblaster is finally done, and it works great. :rock:


The structure of mine is elusively wood; I didn't use any metal to cover the inside.

I'm not gonna tell you how to actually build the box, if you need help with that part then you shouldn't be working on a motorcycle. :D

I didn't draw out a plan of any kind, I just started cutting plywood, and designed it as I went.

Early phase, basically just a box:

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Here I enclosed the bottom:

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Once the bottom was enclosed, I made pieces for the inside that made it taper in both directions, as you see here:

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Found some fittings to run the air hose through the plywood wall. I think they are plumbing fittings though.

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I installed the hoses for air and the sand pickup. I bought a super cheap blasting gun off fleabay, it works great, and came with the pickup hose, pickup pipe, and some spare nozzles.

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Added a light so I can see:

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At this point it started to get kinda heavy, so I added some wheels. Do not underestimate the value of this feature. :D

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Then I put my door on. I used regular home door hinges, very sturdy, and cheap. Home depot sold acrylic sheets in 30"x30" for like $17, so I bought one and cut it in half, that way I have a spare for when the glass gets shitty. I cut the hole a little smaller than the glass, and made little wood retainers on three sides to hold the glass in, then I just used some race tape around the edges, and viola! :rock:

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I put foam weather stripping around the edges to seal it, and used these style of latches, I dont remember what they're called but you get the idea.

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I put a pvc fitting in the side near the light so I could hook my shopvac up to it. The vacuum fits in great, but I need to add some vents on the other side, it sucks to hard right now that you can't move your hands with the vacuum on.

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Completed, ready for operation:

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My local place didn't have any alum oxide, so I got impatient and went with glass beads. A little softer, but works great.

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Overall this was a great idea and saved me a ton of money.

I spent about $90 on wood, $20 on the gun, $20 on the media, $20 on hardware, $17 on hose & fittings, $15 on glue and screws. I'm not sure how much I spent total, maybe $250, but I think to buy a unit this large would be $1000 or more.

It should be large enough to do my frame if need be. It will def fit, but I'm not sure if I'll have the mobility to actually do a good job.
 
#2 · (Edited)
Any questions or comments would be appreciated.



Does anyone know how much pressure I should be running in this thing? So far I've run it at 60 psi, and I fell like I would like more power. My compressor is pretty big, so at 60psi it only kicked on every once in a while.

What should I run, 80 psi ? 100 psi ?
 
#5 ·
Gloves were $18 on fleabay. THey're great though, cotton lined. They are just hose clamped on 2 giant PVC fittings.
 
#6 ·
How much more would it have cost to do it out of sheet metal?
 
#7 ·
I dunno, prob a lot more. There seems to be no probs with wood construction.
 
#10 ·
It's not even close to that heavy. It's plenty sturdy the way it is. The box itself gives the legs plenty of strength.
 
#12 ·
I see what you're saying, but I'd be comfortable putting 300 lbs in it the way it is.
 
#14 ·
NO prob:

THis is the seller for the gloves, various sizes are available. Look at his other listings.

Gloves

Gun is like this one, lots of sellers offer the same one for similar prices

blasting gun
 
#17 ·
When I was preparing to do this I saw pics of people's media blasters made out of all sorts of stuff. Steel 55gal drums was a common one. I did mine the way I did because I needed it to be a specific size and be able to move it around easily.
 
#21 ·
actually, I've been using this a fair amount and the unprotected wood is not an issue at all. I can't even see wear from it.

I'm running 90psi, glass media.

Biggest issue is how fast the window wears out. I'm using plexiglass right now, but I might try real glass, because this shit gets cloudy kinda quick.


I love it though, I shoulda built this thing a long time ago.
 
#22 ·
The thing that's been keeping one from showing up in our garage is the several hundred dollar air compressor that is also needed. My dad wants one to run some basic air tools off of, but I keep telling him to just do it right the first time and get a bigger unit. Then the problem becomes weight. We want to mount it in the rafters of the garage so we don't use up an precise floor space.

Once again, the Benjamin's just aren't growing fast enough... maybe I should plant another tree in the back yard. :)

Have you tried other media then the glass beads? I keep hearing great things about soda blasting but I think you need some extra equipment to use it so it doesn't clog the gun.
 
#23 ·
ah, that is key, I have a good size vertical standing compressor, and it works great, but any smaller would be bad news. A small one would be unusable. You def need a compressor though, I use the impact wrench all the time, my air grinder, etc.....

EDIT: haha, stop spending money on your damn car. :D
 
#28 ·
ya? where would I find something like that? is it designed for blasting, or how would I find it?
 
#30 · (Edited)
This is what I have:

26 gal

4 cfm @ 90 psi

6 cfm @ 40 psi

1.5 running HP motor




It is fine for what I need, bigger is always better though. I give mine a break every 12 min or so to catch up and cool off. The pressure I run it at depends on what I'm blasting, but lately it's been at 90 psi. That's been great for most things.
 
#32 ·
thanks man, I've been using it alot and it's holding up perfect. No wear problems or anything.
 
#34 ·
I've used it a TON, and it's fine. I dont think it's gonna be a problem.
 
#36 ·
I have wanted a blaster for a long time. ever since i was doing my appernticship as a auto sparky and had to blast all the casings and stuff i was repairing. loved how clean every thing casme out and looked like new.
i have a small 50ltr compressor and the gun, i had a bag of beads but my mum thought it was sand and used it in the garden. once the shed is built im hoping to get a much larger compressor of my mate. im hoping to make a cabnet that i can multi use as a small spray booth as well. but im de=reaming at the moment. i need to build the shed 1st.

but im glad to know the wood is holding up well. that knowledge makes it much cheaper and with in most peoples skill sets to make it out of wood.

some kind of film or thin plastic sheeting is in order i think. keep us postd on what you do about the window.

rep for trying it out and adding to the knowledge pool that is CF.
 
#37 ·
the plastic is starting to get pretty screwed up.


You can see what you're doing fine, but you can't see the surface texture anymore. I have a spare piece of plexi, but I just havn't used it yet.


You could use some film covering to make it last longer, but honestly, I'll prob just replace the glass every year or two. I can get a sheet of plexi for $18 that is big enough to make 2 windows out of.
 
#38 ·
What's the purpose of using the vacuum?
 
#39 ·
It helps clean the air inside. I need to modify my venting system, because right now it's too much suction and it's pulling on the window.


When running properly, it pulls all the dust and debris out of the air so you can see better. :rock:
 
#40 ·
Man, I want to make one... it's just that my compressor is one of the teeny pancake style ones. :(
 
#41 ·
I still give mine a break every 15 min roughly. a tiny one would be a waste of time. Save up for a bigger one dude, they aren't too bad.
 
#44 ·
hmmmmmmmmmmmmmmmmmmmmmmmm

what kind do you have? size/cfm@??psi?