How Do Sandblast Guns Work? How Do You To Set A Sandblast Gun Up? 

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The challenging part is keeping it all in a slurry so the suction gun can pull it up. Then making sure you have the right suction. Your compressors CFM capabilities plays a big role in that. This is for dry blasting, but it gives you an idea of what is needed: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-OaWxDhMGiIk.html

@@blastitall thanks ! I’ve a 7,5 hp with 25 CFM i’ll try to choose my jet accordingly, i use a water pump to also help getting the slurry up !

Yes, the gun body can wear out. We have seen some with holes in them.

I'll try to give you an explanation. A proper vacuum gauge will read from 0"-29" HG. So the higher the indicated value, the better or more vacuum. We usually see our suction guns read from 15"-16" HG once they have been adjusted. As the orifice is extended out of the gun the vacuum will increase to a certain point and past the point it begin to decrease (kind of like a sweet spot). Using this type of setup for the gun is the best way to know if your gun is drawing the most amount of vacuum and is working correctly. Thanks for the question and I hope this helps. - Tracy

@@blastitall that is a great help now i understand thank you for your help and quick reply regards john

@@blastitall thank you Tracy fine tuned my sandblast gun today and working fantastic regards john

The nozzles are matched with the orifice to provide the best possible suction. Here is a chart that shows nozzle and orifice pairing. blast-it-all.com/cfm_requirements/

Yes we do. You can find a video on those here: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-yNiTg98F6TE.html They can be purchased from our store: blast-it-all.com/product-category/eco-gun-parts/

Edward that particular Gun requires a minimum of 21 CFM at 60-80 PSI. Here is how an Ingersoll Rand rep explained it to WorkshopAddict.com. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-6vWqa7WjkVU.html

Thanks for informative video. Really liked about vacuum gauge attachted to gun to measure best adjusment. Will try that.

@@pizdriks Let us know how it goes.

@@blastitall measured vacuum on inlet. Thought that range would be greater, but it didn't change a lot between almost fully threded in to say 6 or 7 threads out. Gauge read about 0,4bar vacuum +/- 0,2bar But still, was good to check that.

@@pizdriks Make sure your nozzle is in good shape as well and is the correct size (Matches the Orifice size)

The nozzle and jet size will be different depending on what type of work you are going to be doing. What will you be blasting?

@@johnklaver4960 I will be running coal slag on car frame its about .140 thick

What blast gun do you have?

Try a number 4 or 5 Nozzle

The principals of suction will still work outside the cabinet. Provided you have the correct compressor for the nozzle and jet pairing. Moisture is your enemy. Try to keep the media dry.

That does seem a little odd. When you say it shoots like crap what is it doing or not doing?