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Tool Talk Discussion Forum

Question about a cheapie sand blaster

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Kmiller

10-16-2005 21:29:59




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I bought one of those cheap sand-blasters, it just has a hose with a pipe on the end to stick down into the sand. I never could make it pick up any sand, is there some kind of trick to it? I don't expect it to be as good as a "real" sandblaster, but I couldn't get anything out of it but water. It does have suction on the port on the bottom where the hose hooks on.

Is there a trick to making this thing work? I did cut off half the hose for the pickup tube, it was collapsing instead of sucking up sand.

Kerry

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BobinKY

10-17-2005 19:30:09




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 Re: Question about a cheapie sand blaster in reply to Kmiller, 10-16-2005 21:29:59  
I bought a sandblasting box from Eastwood some years ago and it uses a suction pick-up for the sand. I have never had trouble with this system in all of the years I have used it. I also have a cheap sand blaster that uses a five gallon can and a siphon hose. It works well for small parts. Your sand must be strained through a window screen to ensure that you do not have large chunks in the sand. Your air supply must have a water trap in line to ensure that you do not get "ANY" moisture into the sand or the pick-up tube. The sand must be loose in the bucket, not compacted. Stir it up with your hand or a big stick. Do not jam the pick-up tube down into the sand but introduce it gradually so that it does not form a plug in the end of the tube. Occassionally, place the end of the nozzle "firmly" against the palm of your hand covered with a thick rubber glove and pull the trigger. This will make the pick-up tube flush backwards and ensure that tube is not plugged and the sand is flowing into the tube. I hope that you have a hood and a cheap pair of coveralls or you will be getting sand out of your drawers until you bathe again. They are available cheap from places like Harbor Freight or Norther Tool. Painters coveralls work great. We get them for about $10 pair and just throw them away when they get a hole in them. By the way, you wnat to be careful where you choose to sandblast. If you are sandblasting in your driveway, be sure to get away from doors and windows where the sand can blow back into your workspace when the wind blows. Take it from a guy who found out the hard way!!! Hope this helps.

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Kmiller

10-17-2005 13:09:19




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 Re: Question about a cheapie sand blaster in reply to Kmiller, 10-16-2005 21:29:59  
I misspoke about the water, I meant it would pick up water out of a cup just fine and I can feel suction on the tube on the bottom but it wouldn't pick up the sand. I'm using play sand, maybe it's too coarse. I'll try tinkering with it again, thanks!

Kerry



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onefarmer

10-18-2005 13:00:08




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 Re: Question about a cheapie sand blaster in reply to Kmiller, 10-17-2005 13:09:19  
If your using the brown play sand then it is too course. What you need is the fine white silca sand. It's about like sugar or tablesalt in granual size



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jmh

10-17-2005 06:50:42




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 Re: Question about a cheapie sand blaster in reply to Kmiller, 10-16-2005 21:29:59  
I have used the cheap blaster very successfully for several years. The secret is plenty of pressure, DRY sand, and the right size tip. I have had excellent results using only fine sand. Too coarse grade sand causes all kind of problems. Be aware the tip orfice is continually getting bigger as you wear it away. I make my own tips with a 3/16" dia. orfice. If you seem to be getting air only at the tip, pull the hose off the handle and look up in the bottom of the handle, probably will be a rock or trash blocking the sand. jmh

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Mike M

10-17-2005 04:56:15




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 Re: Question about a cheapie sand blaster in reply to Kmiller, 10-16-2005 21:29:59  
I bought one made similar many years ago it doesn't work too bad. I ended up using it in a blast cabinet. The pickup tube on mine has a hose connected to a metal tube that has a bigger tube around that. I think it is to help let air in so the sand can suck up. You can also change the nozzles and an air jet inside to vary performance.



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BillR-CA

10-16-2005 22:21:47




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 Re: Question about a cheapie sand blaster in reply to Kmiller, 10-16-2005 21:29:59  
Could be that the sand has dirt or other junk in it that plugged the pickup tube. That would cause it to collapse. Try blowing air back through the hose to clear it. If the hose is plugged then no sand will go through, but the air will throw off water as it decompresses, so all you'll see is a lot of air and a little water.



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old

10-16-2005 21:44:57




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 Re: Question about a cheapie sand blaster in reply to Kmiller, 10-16-2005 21:29:59  
You sort of answered your own question when you said water. You need dry, dry ,dry sand and a compresser with a water trap or they/any sand blaster will not work. I never have trouble with my $12 wal-mart one. But I don't use it on wet days and I have a water trap in the air system.



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Kmiller

10-17-2005 18:24:04




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 Re: Question about a cheapie sand blaster in reply to old, 10-16-2005 21:44:57  
Thanks for the info, I'll tinker with it again. If you guys say they work ok, I'll assume I'm doing something wrong! I do need a separator because I was getting a little water out of it (before I dipped it into a cup of water) so I'll put that on first.

Thanks,
Kerry



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