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Old 03-15-2006, 09:30 PM
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Loss of air pressure

My die grinder will run my air lines out of air, this is the same line that will keep up with a pressureized sand blaster.

I can turn it on and watch the regulator go down from 100lbs at the regulator to fifty lbs in short order, any ideas here, please.

Rob

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Old 03-16-2006, 05:02 AM
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did it work b4 on the regulator? regulator's are great but they cut CFM, which will kill your preassure if you don't have enough CFM required for the tool, die grinder could require as much as 10 cfm depending on brand and whatnot.
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Old 03-16-2006, 05:55 AM
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What matt said,try bypassing the regulator,it's really not needed for a die grinder anyway,you'll probably find that unless you have a very large compressor,it wont keep up with steady use of most die grinders.
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Old 03-16-2006, 06:02 AM
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What size is your compressor? A small single stage will not be able to keep up. Die grinders are CFM hungry and will quickly drain a small compressor.
Mark
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Old 03-16-2006, 07:47 AM
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10 CFM is very Conservative for a die grinder, 14-15 CFM is more like it for most, and some of those "cheapie" grinders will make you think the hose is busted
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Old 03-16-2006, 09:13 AM
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It used to work fine, now it won't.
I run two sharpe F88 filters, then a sharpe 880A filter with a sharpe GA160U pressure gauge, I took the front off the regulator, it looks okay, I would hate to have to tear it all apart.
Picture # 22 on here shows the set up.
Thanks guys, I appreciate it a lot.
Paint booth, Ventilation, etc.
http://www.2manitowoc.com/paintroom.html

Rob
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Old 03-16-2006, 02:41 PM
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Quote:
Originally Posted by oldred
10 CFM is very Conservative for a die grinder, 14-15 CFM is more like it for most, and some of those "cheapie" grinders will make you think the hose is busted
my HF die grinder is rated for 8 CFM but most tools are rated for less than they acutlly need. for instance my IR DA sander is rated to use 17 CFM@90, but a HF DA sander, is rated to use around 6CFM@90.
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Old 03-16-2006, 03:51 PM
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Matt, Let me back up a bit there. You are right about the ratings on the die grinder a die grinder should not use nearly as much as I said. What I was thinking about at the time was a cut-off tool, not a die grinder A cut-off tool will generally use a good deal more air than a die grinder, my mistake.
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Old 03-16-2006, 04:45 PM
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I found the problem, it was the first F88 filter stone, it was plugged.

When I changed out compressors, I changed all the filter stones out, so if you're putting in a new compressor, watch your pressure drop after a month or two.

This one is a porter cable 7 horse two stage.

I'm guessing it came out of the tank, maybe there is a film they put in to keep them from rusting, don't know.

Appreciate the help I always get, you guys have a good one, thanks again.

Rob
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