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Harbor freight sand blasters

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speed bump

08-23-2001 04:21:32




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tried my brother inlaws siphon unit with my air compressor and it just would not work , not enough air I reckoned. how about the pressure blasters from harbor freight . they claim they work with less air , are they any good . thanks for replys!!! speed bump




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Al English

08-23-2001 16:27:38




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 Re: harbor freight sand blasters in reply to speed bump, 08-23-2001 04:21:32  
Pressure pot blasters operate at a lower air pressure than is needed to get something done with a siphon blaster, but pot type blasters require a greater volume of air. As you have found, pot type blasters deliver a greater volume of sand, which makes them more effective...Al English



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Greg

08-23-2001 11:37:25




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 Re: harbor freight sand blasters in reply to speed bump, 08-23-2001 04:21:32  
I've had a harbor frieght pressure blaster for 14 years now. Over the years I've used it several times for various projects. Here's what I've learned: plan on buying fine blast sand, run at least 90psi continuous on your compressor, completely dry the compressed air, estimate the time you think it will take to do the job then double it. This may sound pessimistic but it does take time to blast with one of these small units, especially if you don't have a good air supply and dry sand & air (you'll spend more time clearing clogs than blasting). I'm doing a project right now that I plan on taking the big parts to a commercial blaster at $65 per hour, and doing the small pieces myself. The commercial guy can do in one hour what it would take me nearly all day to do at nearly the same expense, not counting my time.

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Chuck

08-23-2001 10:38:53




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 Re: harbor freight sand blasters in reply to speed bump, 08-23-2001 04:21:32  
I have a HF pressure rig that I used to clean my case VAC. Needed a bit of air. I used two 3+ hp compressors in parralel and it worked ok. I did go through the shut off valve pretty quickly, and the valve from the tank is getting bad also.



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Mike

08-23-2001 08:33:01




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 Re: harbor freight sand blasters in reply to speed bump, 08-23-2001 04:21:32  
You have to have "dry" air, if you're in a humid climate. Otherwise, the sand gets wet around the outlet from the tank and won't work. I got mine from TIP, and it works fine now that I dried up the air supply. Their catalog shows how to do it.



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Bill

08-23-2001 06:11:04




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 Re: harbor freight sand blasters in reply to speed bump, 08-23-2001 04:21:32  
I have a pressure sand blaster (sand is in a tank that is pressurized and you control the sand output, and mixture with the airline, with a valve). This works the best of all blasters I have used. The siphon type uses a lot of sand and doesn't have the same nozzle pressure. I bought a siphon sand blaster, from Nortern Tool, that goes on a pressure washer. All it did is use sand and what it did clean rusted again. They did refund my money. My vote is for the pressure sand blaster.

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Butch(OH)

08-23-2001 05:58:33




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 Re: harbor freight sand blasters in reply to speed bump, 08-23-2001 04:21:32  
If you have much work to do, those syphon blasters will test a persons patience no matter what compressor you have. Reason being, they only have the short distance from the suction hose to the tip to accelerate the sand. With a pressure blaster, the sand is moving almost at the air velocity. The pressure blasters will work with a small compressor if you put a small tip in the nozzle. But you must buy the higher priced fine screened sand to prevent clogging, and you still will have to stop and wait on the compressor. My harbor freight blaster has the next to smallest tip installed and when I use it takes both of my compressors, a 3 HP Sears and a 6.5 HP Coleman to blast continuously. Order some extra tips, they don't last long.

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speed bump

08-23-2001 21:59:08




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 Re: Re: harbor freight sand blasters in reply to Butch(OH), 08-23-2001 05:58:33  
well it sounds good enough to buy for the 100 bucks . I will run it with a dryer at the end of my air hose ware the air is cooler too get out the most moisture. thanks for the good info, speed



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Butch (OH)

08-24-2001 05:56:05




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 Re: Re: Re: harbor freight sand blasters in reply to speed bump, 08-23-2001 21:59:08  
On real humid days you will still have problems even with the seperator located at the blaster. One thing that realy helps is to have an extra 50' of hose connected up and coil up the excess in a drum or bucket of cool water, "condenser" I beleive is the proper name.



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