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12/18/2021 5:08 PM  #1


Sand blasting media input

Just want to do some light paint and light rust removal on my cars inner subframe engine bay and few impossible  to sand out places. I just purchased a 20lb harborfreight sandblaster also a larger blast nozzel with a better ball valve Large Ceramic Sandblaster Nozzle Assembly: C1 (1/8" ID) Nozzle Tip, Steel Ball Valve & Holder- Longer-Lasting Professional Abrasive Blasting Nozzle Tip Replacement https://www.amazon.com/dp/B07RZNY6KT/ref=cm_sw_r_apan_glt_fabc_VSRCRSKP49ZAZQ1D2F5J?_encoding=UTF8&psc=1. Im sure the brass valves that come with the harborfreight unit wont last very long at all especially since I plan on turning down my ball and limiting my sand out put some people dont like to do this to the bottom exit valve as it cuts the life. I plan on buying some stainless steel ball vales for my harborfreight  sand blasting unit. That way they should last longer plus I plan on keeping one on hand for a spare. Im probably thinking over kill again. As my cars pretty clean and for the most part the paints stripped off. I have used 80 mesh red garnet blast media it seemed to work pretty well just didnt know if there was another good option. Also anyone have experience with nozzle sizes? I ended up buying a couple different nozzles for the large ceramic blast nozzle kit. I will post feedback on the different sizes. I have only used the regular harborfreight replacement nozzle before. Hopefully the new nozzle will turn out to be a good buy. IVE been debating starting a small sandblasting side business There isnt many people out here doing that type of work.

 

12/18/2021 7:10 PM  #2


Re: Sand blasting media input

You size the nozzle to match your available CFM after taking grit size into consideration.  Small compressor = small nozzle
Big compressor = big nozzle.

My guess is that 1/8” is about right for most home compressors.

 

12/18/2021 7:51 PM  #3


Re: Sand blasting media input

Bentworker wrote:

You size the nozzle to match your available CFM after taking grit size into consideration.  Small compressor = small nozzle
Big compressor = big nozzle.

My guess is that 1/8” is about right for most home compressors.

 
Thank you I was planning on using 80 mesh garnet. I have 1/8" nozzles and 3/32".  I will be powering the blaster with my quincy honda powered air compressor its a 30 gallon tank capable or 17 cfm i think at 175 psi. I might grab a reserve air tank if my newly built compressor is lacking under taking the task..

     Thread Starter
 

12/23/2021 8:18 PM  #4


Re: Sand blasting media input

I ended up taking a trip about 45 minutes away to a local sandblasting supply house. I ended up buying green diamond 60/30 I believe its called. Representative stated their sandblasting techs use this abrasive almost every day on most all their body panel work very universal he stated. And there are a few other meshes out there as well he said work good for hoods where if you are scared of worpping the metal. One trick I realize is to dust the steel don't blast directly at it. The cost out the door for one 1 100#lbs bag 60/30 green diamond was 17.25 out the door. I will let everyone know how the media performs its supposed to be great in cabinets and works well as wet blasting as well.

     Thread Starter
 

12/24/2021 6:25 PM  #5


Re: Sand blasting media input

Seventeen cfm at 175 psi?

Serious compressor envy coming at you from TX!!!

I am looking forward to your detailed feedback on how this blasting job works out.


Money you enjoy wasting is NOT wasted money... unless your wife finds out.
 

12/26/2021 12:20 AM  #6


Re: Sand blasting media input

Something else from when I was using my Brut blaster a lot.  I got a cheap toaster oven to rejuvenate desiccant.  Had enough desiccant on hand to have a spare charge for the large desiccant air dryer I used.  Made blasting much easier when I had bone dry air.

I used AC (60-120) glass bead. 

Get a fitted respirator.
Also keep it mind you don’t want that stuff in your eyes.  Goggles and a nomex balaclavas under your blasting hood it a good idea.  After I got media in my eyes one time I’d keep the goggles on until I was in the shower and had shampooed my hair.

The ophthalmologist was pretty stoked to go fishing for glass beads, I didn’t share the same enthusiasm.

 

Board footera


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