|Re: Grit blasting [message #66039 is a reply to message #58513 ] Fri, 12 April 2013 03:30 UTC
I use it now. |
Be forewarned though. Do NOT use Aluminum Oxide or Silicon Carbide grit!! It is nasty stuff and you need a face respirator to keep from
getting Silicosis. The little mask in the kit is useless with these grit.
Ok I had to modify mine to allow more air flow because I use Baking Powder. It is a mild abrasive so it can do a good job with out cutting into your designed part.
It is like talc so the holes need to be opened up to allow more air flow.
I have tried an unmodified one and it seems to work fine with out the modification. Go figure.
Ok you need absolutely dry air for this to work. A small compressor with a moisture trap in line plus the trap in the hose and you are OK.
Pressure setting is between 25-65 PSI.
I set mine to 40 to defrost the FUD parts I have and it works great. But I had to try different PSI settings to get it right.
The Baking Powder is dirt cheap and I have about 7 pounds and it cost less then 5 bucks. Once you get it pushing the baking power, it gets everywhere. I use the face respirator too. The kind with cartridges on it.
I use mine outdoors so it isn't too bad. The tip has a tendency to get clogged up with baking power too. Not much but you will need to use a
piece of 30 gauge wire to push it down the opening. Be careful or you can damage the air tube behind the tip insert. I just unscrew my tip and use a needle to open the orifice back open. And then once you depress the trigger you get a cloud of powder before the pressure kicks in and at that point you start cleaning your parts. The more delicate the detail, the less air pressure and longer time to clean them up.