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Tried out my mini sand blaster...


 
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lastcowboy32
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Joined: 20 May 2015
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PostPosted: Wed May 15, 2019 4:49 am    Post subject: Tried out my mini sand blaster... Reply to specific post Reply with quote

FIRST OF ALL, Thank you to "unc" for suggesting this idea on my previous post.

I had previously posted about air requirements for sand blasting, and a small blaster was recommended. It's handheld and has a media hopper right on the gun.

This picture shows what I could get done with two charges of air in my 24 gallon compressor that stores at 135 PSI and the output regulator set to 90PSI.

I'm happy, because this is exactly what I needed: the ability to get into crevices. As a matter of fact, it cleaned this fender crevice and exposed a crack at the root that I'm going to weld. When I welded, the blaster was just as good at getting back into the crevice for slag cleanup before priming/painting. PS...it's a good thing I was wearing protective gear, because blasting after welding equals HOT SAND flying all over...

PPS, my estimates of run time vs air recharge time using the ideal gas law (PV =nRT) were just about right on the money.

With my system (24 gallons, 135PSI, regulated output at 90PSI and 4.0SCFM pump) I got about 15 seconds of blasting with a 30-45 second run time to recharge.

The blaster is a Neiko 30068A, $35.99 on Amazon.

This is not an ad, just an evaluation.



 
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unc
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PostPosted: Wed May 15, 2019 6:03 am    Post subject: Re: Tried out my mini sand blaster... Reply to specific post Reply with quote

Looks good. That's a nice finish. unc
 
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lastcowboy32
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PostPosted: Wed May 15, 2019 7:06 am    Post subject: Re: Tried out my mini sand blaster... Reply to specific post Reply with quote

That was initial cleaning.

After cleaning, welding the crack...adding a reinforcing rib made from a piece of lawnmower blade, then blasting all the welds (and all the other crevices on the fender) with the handheld blaster (which took about ten blast/ recharge cycles)...

We wire-wheeled the rest of the fender enough to get the loose paint and rust bubbles.

This was all that I wanted to do, get a surface ready good enough for some rust oleum and krylon.





 
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Ultradog MN
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Joined: 22 Apr 2001
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Location: Twin Cities

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PostPosted: Sat May 18, 2019 2:44 am    Post subject: Re: Tried out my mini sand blaster... Reply to specific post Reply with quote

Lastcowboy,
Just to make you jealous. Wink...
I live right by a small high tech
foundry and have gotten to know the
owner real well. The place runs two
shifts and a skeleton crew on Saturdays.
They have two sand blast cabinets -
hooked up to a 75 hp screw type air
compressor.
So I go over there and blast my parts on
occasion - evenings and Saturdays.
The cabinets are large enough to put
your fender in and turn it over/around
pretty easily.
Here are a few parts off a Ford I'm
quasi restoring that I sand blasted
lately.
To say I'm grateful to get to use them
is an understatement.




 
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lastcowboy32
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PostPosted: Tue May 21, 2019 12:44 pm    Post subject: Re: Tried out my mini sand blaster... Reply to specific post Reply with quote

Ultradog,

The word envious is not strong enough.

Coincidentally, my wife's uncle runs a professional polishing shop. I worked there for about six months when I was between engineering jobs.

She suggested that I see about getting some time in his blast cabinets. He would probably let me, but it's a half hour away...

But man... if it was next door?
 
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