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Sandblaster

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wdTom

04-28-2003 18:25:32




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I have a small sihpon sandblaster that I use for small projects. Lately I have been having trouble with it not sucking up the sand. Then I tried some fine sand a friend had given me when he moved. Worked much better. The sand I had been using was sand I had collected and sifted myself. It all went thorugh the sifter that came with the blaster, but some of it was good sized. Does anyone know if these small blasters have trouble with large particles of sand? Or so I have something else going on.

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Brad Houck

04-30-2003 19:27:33




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 Re: Sandblaster in reply to wdTom, 04-28-2003 18:25:32  
It sounds to me like you don't have a problen with your sand. Do you have a water filter element in line on you compressor. If so check it to see that it is working properly. Remember the sand going through the carbibe nozzle creates heat and when you blow cold air with a little moisture through the warm nozzle constantly you will get condensation inside the nozzle that will turn any organics in your sand to mud. So you need to make sure the air coming from you compressor is as dry as possible. If that doesn't get it try opening up the through diameter of the nozzle tip and have a counterbore put on the end of the nozzle that is inside the trigger mechanism. I did this to mine. This will allow better flow. Oh yea you will need to have this done at a machine shop. You won't drill that carbide with a HHS drill. Hope this helps.

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wdTom

04-29-2003 18:38:32




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 Re: Sandblaster in reply to wdTom, 04-28-2003 18:25:32  
My sand is dry, but you guys gave me some good tips too, THANKS!!



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C

04-29-2003 17:59:42




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 Re: Sandblaster in reply to wdTom, 04-28-2003 18:25:32  
After the sand is recirculated and reused over and over and over it breaks down into very fine dust, kind of like flour. Then it just sticks and does not flow. Dump out what you have and clean out your blaster real good and start over with fresh new sand.



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Peter (NY)

04-29-2003 12:01:02




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 Re: Sandblaster in reply to wdTom, 04-28-2003 18:25:32  
There's also a product called black beauty. You can get it from a lumber yard or hardware store. Maybe even an auto parts store. It's relatively cheap and made specifically for sand blasting. It's made from slag.



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hay

04-29-2003 09:54:36




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 Re: Sandblaster in reply to wdTom, 04-28-2003 18:25:32  
i have been using construction morter sand left over at building sites. just screen it well and heat it in the oven at 200 degrees for about 1 hour. it will flow a lot better when it's hot.



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Ben in KY

04-29-2003 11:15:39




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 Re: Re: Sandblaster in reply to hay, 04-29-2003 09:54:36  
WOW!! Hot sandblasting, that stuff burns be up enough cold :)



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RayP(MI)

04-29-2003 09:28:50




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 Re: Sandblaster in reply to wdTom, 04-28-2003 18:25:32  
Any moisture in your sand? If so, that may be the problem. I have a sand pit on my place, and usually collect several 5gal buckets at a time, and store it in a dry barn for up to a year before use, turning it once in a while, to be sure it is dry.



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JoeK

04-28-2003 20:34:47




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 Re: Sandblaster in reply to wdTom, 04-28-2003 18:25:32  
If it screened OK,I would say it's not the size.What you collected may have some clay particles in in which will absorb moisture from the atmosphere and airflow from compressor.Other than that,check that nozzle and air jet inside are not worn.When I scrounge "raw sand" I try to find a sandy beach or riverbank and only skim the top inch or so,which has been "washed" by the water and rainfall,then dry it thouroughly on a tarp in the sun.Screening it by letting it fall a couple feet from the screen to the container with a lite breeze blowing will allow a lot of the useless dust/clay/organics to blow away.Or look for a sand/gravel dealer that sells bulk washed sand for concrete/mortar use.

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Wayne

04-28-2003 21:31:05




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 Re: Re: Sandblaster in reply to JoeK, 04-28-2003 20:34:47  
Even bulk washed sand like the kind used for mortar, etc is likely to have clay particles in it. Also it's a different kind of sand than normal blasting sand. Blasting sand is a silica based material that has sharp edges that make it more condisive to removing the paint, rust, or whatever. If you blast something with regular sand you stand the chance of the impurities being forced onto the metal and into the pits caused by the sand. If this happens, not to far down the road your gonna be watching the paint release from those areas. I learned that the hard way years back, and have never forgot it.... I didn't do the job right the first time, and tried to save money on the sand, and it wound up costing me double in the end. Around here I can buy regular BX-12 medium grit blasting sand in 100lb bag for about $4 a bag. I get mine from one of our local concrete companies that carries it along with the mortar, etc, in with the building materials. Even if you can't reclaim it, you should come out ahead in the end because with it's cutting ability you don't have to use as much as you would "regular" sand. I use a pressurized pot type blaster with a 300lb capacity and you'd be amazed how much you can do with just one pot. Good luck with the blasting. Just remember when blasting to wear some type of respirator/dust mask to prevent breathing the dust created when the sand particles shatter. This is especially importanty with blasting sand as the dust is silica based. I don't know all the details about the silica dust, but I do know it isn't good for the lungs.

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