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Old 03-02-2009, 01:38 PM
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Low CFM Die Grinder?

Hey guys,

Just wondering what you would recommend in regards to a low cfm die grinder. I have an IR 24gal garagemate compressor that puts out 5.7cfm @90psi.

I'll be using it for basic stuff around the garage nothing big

Also, is it best to get a straight or angle version?

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Old 03-02-2009, 05:47 PM
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Well for sure none of the "cheapies" will be satisfactory since they are well known as air hogs, I hate to say it but most will require about twice the CFM they claim in order to work properly. Due to the way the things work they all require a relatively large air supply so you are going to find even the best of them will not work very well with a compressor that size. If you have a lot of use for a die grinder you might want to consider an electric type but they are usually quite a bit bigger.
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Old 03-03-2009, 07:24 AM
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Although you asked about a air grinder, a electric model was mentioned. I'm using a Makita electric die grinder and it works very well for me. The main thing is for small jobs I'm not waiting for the compressor to come up to pressure. The compressor is not on all the time, just when air is needed.

I can't see running one tool (compressor) to run a second tool, die grinder.
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Old 03-03-2009, 07:51 AM
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Quote:
Originally Posted by jaguarxk120
I can't see running one tool (compressor) to run a second tool, die grinder.


Most people just don't realize, or at least don't stop to think about it, just how energy inefficient most air tools are, especially rotary motor tools like die grinders and cut-off tools. Most die grinders and cut-off tools need around a 14 or 15 CFM compressor to be able to run full time and then they will only produce a fraction of the HP required to run the compressor! That little compressor, 5.7 CFM, will work very hard to run even the best of these things and will require a lot of time waiting on the compressor to catch up so that's why I suggested an electric die grinder.


Those Makita die grinders are REALLY good, they have lots of power, run smoothly and will hold up well under everyday use. For a cheaper alternative for just occasional work the Harbor Freight "DeWalt knock-off" is a decent grinder and comes on sale quite often. It has a lot of power and it too runs very smooth but I would not buy one to use in a shop everyday, weekend hobby use it should be just fine.
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