That is probably not really enough compressor. I have a similar Craftsman
setup. Using fine sand and a fine nozzle, it works if I wait pretty often
for the compressor to catch up. If you watch the pressure gauge on the
sandblaster tank you'll know when it is time to wait - of course the fact
that it isn't stripping very much of anything any more is also an important
clue. It will work, and if you are doing small things it will be ok. For
big things it will be pretty frustrating. Change nozzles frequently, the
small nozzles become large nozzles pretty quickly.
Also, I agree with the previous comments about reducing the sand volume. I
find that on this blaster, it works best to open up the sand valve until a
lot starts coming through (to start the flow), then quickly reduce the sand
amount by quite a lot. Experiment a little, it'll be obvious when you get
the right combination of sand and air because it'll work like you thought a
sandblaster was supposed to!
----- Original Message -----
From: "Rex Burkheimer" <firstname.lastname@example.org>
To: "Randall Young" <ryoung@NAVCOMTECH.COM>; "shop-talk"
Sent: Monday, October 02, 2000 4:09 PM
Subject: Re: SAND BLASTER QUESTION
> My compressor is the 6hp oilless "Professional" Craftsman, with about a 30
> gallon tank.
> You think I don't have enough compressor?
> There is nothing between the compressor except a 3/8"x50' hose and Milton
> Pressure at the blaster gauge reads 120#. I have not watched it while in
> Rex Burkheimer
> Marketing Director, WM Automotive Warehouse
> Fort Worth TX email@example.com
> Great minds discuss ideas;
> Average minds discuss events;
> Small minds discuss people.
> ----- Original Message -----
> From: Randall Young <ryoung@NAVCOMTECH.COM>
> To: 'Rex Burkheimer' <firstname.lastname@example.org>
> Sent: Monday, October 02, 2000 4:07 PM
> Subject: RE: SAND BLASTER QUESTION
> > Rex :
> > Sounds to me like something is seriously limiting the air pressure
> available at
> > the nozzle. Are you perchance working through a pressure regulator ?
> Many of
> > them won't pass the air flow necessary to run a sand blaster.
> > Note that there is a vast difference between CFM and SCFM (something
> > at 90 psi) and compressor manufacturers like to gloss over the
> > Unless your compressor is seriously huge (like requires a 220v 30a
> service of
> > it's own to run), I'll bet it's actually rated 11.5 SCFM which is less
> than 2
> > cfm @ 90psi.
> > You didn't say how many cfm your sand blaster is rated.
> > Randall
> > On Monday, October 02, 2000 1:37 PM, Rex Burkheimer
> > wrote:
> > >
> > > Gee, I have all this equipment and I can't figure out how to use it .
> > >
> > > I bought one of the HF $80 (on sale - like everything is) pressurized
> > > blaster. Bought some high tech "star" blasting media "Like sand only
> > > better". So I get the thing all filled, hooked up, and have a small
> > > project, a battery tray, that needs to be made naked. I turn on the
> > > in sequence, from the air pressure inlet downstream through the feed
> > > at the bottom. Media comes rushing out in fairly large volume, but
> > > seem to be taking off the paint very well. I changed to a smaller
> > > but it still did not cut the paint off as well as I thought it should.
> > > fact, I can hold it at a sport for 5 seconds or more and it gets the
> > > clean, but does not take it down to metal.
> > > Doesn't seem to be a air supply problem, as I used the blaster for
> > > a while before the compressor came out (11.5 CFM @ 90psi I think), and
> > > did not take it long to catch up.
> > > Humidity was very low.
> > > I have used blast cabinets with glass beads, I figured this would
> > > dramatically faster.
> > > What am I doing wrong?
> > >
> > > Rex Burkheimer
> > > Marketing Director, WM Automotive Warehouse
> > > Fort Worth TX email@example.com
> > >
> > > Great minds discuss ideas;
> > > Average minds discuss events;
> > > Small minds discuss people.