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Old 09-11-2007, 11:36 AM
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Sand Blaster issue...

Got a sand blaster from Harbor Freight. Seems to clog up when I use it. Changed out the tips and tried other media, but it still cloggs up in the hose right behind the nozzle. Like to much media is being shoved down the hose at the same time.

Any ideas?

Thanks!

Dave

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Old 09-11-2007, 11:55 AM
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Is your media damp by any chance? What are you using. Also, which HF unit do you have?
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Old 09-11-2007, 12:02 PM
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Maybe the compressor is spitting water???
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Old 09-11-2007, 12:04 PM
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Cboy probably has already hit the problem as moisture is the most common cause of clogging except for particles too big to pass through the nozzle, you are screening your media?
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Old 09-11-2007, 12:13 PM
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Sand Blaster...

Yeah the media is being screened before it goes into the hopper. I can't recall if there is a screen before it heads down the hose from the hopper. Will have to look tonight.

Will look at moister as well but media was dried out pretty well just in case and I am not seeing any real moister in the line but will check that also.

Thanks for the feedback.

Dave
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Old 09-11-2007, 12:20 PM
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Air bleed hole?

My blast media (sand) pick up tube has a small hole that draws in air to mix with the sand in the pickup hose if that hole is plugged or too small for what you are using it can also cause problems. I use a water separator just before my cabinet and my system slopes the shop pipe down hill to a pipe drain valve. my shop compressor has an automatic tank bleed that spits out water every time it cycles. when the humidity is high I have to manually drain off extra accumulaation of water.
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Old 09-11-2007, 12:23 PM
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You may not be able to see the moisture but if the air is damp it will cause the problems you described, blasters need VERY dry air but compressed air as it comes from the tank is usually loaded with moisture. What type of water separator do you have on your air line? Where is it located? Do you have a separator attached to the blaster tank? (a very good idea)
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Old 09-11-2007, 02:55 PM
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I have a seperator attached to my blaster and it picks up a lot of water..I also found that buying the sand that comes screened and graded for size works a lot better..I have also attached a old vibrator sander to my sand tank that shakes the blaster and that helped as well...Can't say I have no troubles but I have mitigated against a lot of them...

Sam
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Old 09-11-2007, 08:52 PM
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Quote:
Originally Posted by OneMoreTime
.I have also attached a old vibrator sander to my sand tank that shakes the blaster and that helped as well...Sam

Now that's an idea worth passing on,
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Old 09-11-2007, 09:16 PM
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i have the harbor freight sandblaster and 2 thing i found is moisture from the air will condense in the tip and when it does it stops working--use a drier. the second thing i didnt see mentioned is the sand, regular "play sand" doesnt work well, it has diferent size grains and the larger ones will get stuck in the tip. when you buy sand get the bags with number #30 on the bag, it works fine.
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Old 09-11-2007, 09:45 PM
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Play sand can also kill you! Even if you do use a good respirator the dust produced from using that stuff contains enough free silca to cause serious lung damage if it drifts over any area where people are so be careful. One heavy exposure can cause serious and permanent damage and even light exposure does some harm so if you do use sand watch out for "collateral" damage from drifting dust as it can affect your neighbors or even your pets.
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