What is garnet?

With reference to sandblasting, what is garnet? - Mike

"Michael Horowitz" wrote in message
...
With reference to sandblasting, what is garnet? - Mike

It is a mineral that is very hard, and is one of the more common choices of
grit found on sandpaper.

I'm no expert on sandblasting, but I believe it is only used when the job
calls for very aggressive removal, such as very rusty or heavily painted
THICK steel.

Typically NOT aircraft. :-)
--
Jim in NC

we;;, there goes the planned visit to TSC
I'm wondering if I' m just not using this handheld blaster correctly;
sand works but oh, so slow - Mike


On Sat, 1 Nov 2008 06:01:12 -0500, "Morgans"
wrote:


"Michael Horowitz" wrote in message
.. .
With reference to sandblasting, what is garnet? - Mike

It is a mineral that is very hard, and is one of the more common choices of
grit found on sandpaper.

I'm no expert on sandblasting, but I believe it is only used when the job
calls for very aggressive removal, such as very rusty or heavily painted
THICK steel.

Typically NOT aircraft. :-)

"Michael Horowitz" wrote in message
...
we;;, there goes the planned visit to TSC
I'm wondering if I' m just not using this handheld blaster correctly;
sand works but oh, so slow - Mike

You using a unit run off of a 3 HP or smaller air compressor? That is just
a toy, meant for small parts.

Like another poster said, the garnet leaves stress in parts, especially
aluminum, so I have heard.
--
Jim in NC

Hello Jim - Craftsman 5 HP, 20 gal tank capable of 150 psi but I've
only been able to get it to 125.
Do you think I'm fooling myself? I know SB takes a lot of air - Mike



On Sat, 1 Nov 2008 07:37:10 -0500, "Morgans"
wrote:


"Michael Horowitz" wrote in message
.. .
we;;, there goes the planned visit to TSC
I'm wondering if I' m just not using this handheld blaster correctly;
sand works but oh, so slow - Mike

You using a unit run off of a 3 HP or smaller air compressor? That is just
a toy, meant for small parts.

Like another poster said, the garnet leaves stress in parts, especially
aluminum, so I have heard.

"Michael Horowitz" wrote in message
news
Hello Jim - Craftsman 5 HP, 20 gal tank capable of 150 psi but I've
only been able to get it to 125.
Do you think I'm fooling myself? I know SB takes a lot of air - Mike

Real horsepower or Sears horsepower? If it runs on 110 volts, you aren't
getting 5 HP.

The maximum pressure is irrelevent.

You can do some sandblasting on a 110 volt compressor, but it's pretty much
limited to small parts and you have to take a break every now and again to
let the compressor catch up.


What are you trying to clean up?

--
Geoff
The Sea Hawk at Wow Way d0t Com
remove spaces and make the obvious substitutions to reply by mail
When immigration is outlawed, only outlaws will immigrate.

"Michael Horowitz" wrote in message
news
Hello Jim - Craftsman 5 HP, 20 gal tank capable of 150 psi but I've
only been able to get it to 125.
Do you think I'm fooling myself? I know SB takes a lot of air - Mike

Yep, 'fraid so.

Craftsman ALWAYS over rates their power tools. It probably uses 13 - 15 amps
at 110 V. That's 2 HP to most others.

Any blasting with that is low volume and low pressure, with lots of waiting.
--
Jim in NC

On Sat, 01 Nov 2008 13:18:47 -0400, Michael Horowitz
wrote:

Hello Jim - Craftsman 5 HP, 20 gal tank capable of 150 psi but I've
only been able to get it to 125.
Do you think I'm fooling myself? I know SB takes a lot of air - Mike



On Sat, 1 Nov 2008 07:37:10 -0500, "Morgans"
wrote:


"Michael Horowitz" wrote in message
. ..
we;;, there goes the planned visit to TSC
I'm wondering if I' m just not using this handheld blaster correctly;
sand works but oh, so slow - Mike

You using a unit run off of a 3 HP or smaller air compressor? That is just
a toy, meant for small parts.

Like another poster said, the garnet leaves stress in parts, especially
aluminum, so I have heard.

you would need 3 of those compressors all joined together with T
pieces to get anywhere near continuous air.

been there done that. beadblasting the auster fuselage took 6 weeks
with 3 compressors.

can I suggest that you investigate trailer mounted diesel compressors
of the type made by broomewade.
you will need to brew up some adapters but the trailer mounted
compressor *will* give continuous air at full pressure.

your other problem is concerning the air pressure of your compressor.
120psi will see grunge and corrosion removed quite well.
110psi will only remove corrosion if you play the gun over the part
continuously.
80psi is a waste of time.

my mate ant took my advice and bead blasted his entire sonerai in 1
day and had it painted in that same day.
he reported needing to stop to sweep up the ballotini( you use it time
and time again) but never needing to stop for air to pump up.

Stealth Pilot

"Michael Horowitz" wrote in message
news
Hello Jim - Craftsman 5 HP, 20 gal tank capable of 150 psi but I've
only been able to get it to 125.
Do you think I'm fooling myself? I know SB takes a lot of air - Mike


Mike,

Crapsman is kidding about the 5 HP. A true 5 HP compressor would pull 5000
watts. One horsepower is 746 watts,
and the conversion is never 100%! We always figured about a kilowatt of
input to get one horsepower output. My
5 HP compressor requires at least a 220 volt circuit and pulls 25 amps at
220 volts. To get 5 HP on 110 volts would
require about 50 amps. They measure the current with the motor stalled to
get their horsepower numbers. You can't
run them that way, they would burn up in minutes! Besides, the breaker
will blow. But for a few seconds there, you
were pulling 5000 watts in that little compressor! :-)

Highflyer
Highflight Aviation Services
Pinckneyville Airport ( PJY )