Air Compressor Size

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Coreyw454
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Air Compressor Size

Postby Coreyw454 » Fri Dec 08, 2017 8:46 am

What size compressor is best for running air tools like air ratchet, impact, die grinder, etc. Will this be big enough?

https://monterey.craigslist.org/tls/6406111417.html

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REDONE
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Re: Air Compressor Size

Postby REDONE » Fri Dec 08, 2017 9:22 am

Die grinders use a lot of air. I can't see in that pic, but I've found 5hp to be the minimum for running a single die grinder. Another consideration I can't see in the pic, but oilless compressors are throw-away compressors. They are good for minimal garage use: inflating stuff and occasionally running an air tool. For extended use at or near the duty cycle, stick to oiled compressors and use a filter/dryer when you need clean air.

Personally, I've gotten away from air tools. There's a cordless equivalent for nearly all of them, and a compressor big enough to run most of them takes up a lot of space and energy. I mean, a 5hp electric motor only gets you maybe a 1/4hp at the tool. A big compressor is pretty much necessary for serious body work, but not much else.
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Stuka
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Re: Air Compressor Size

Postby Stuka » Fri Dec 08, 2017 10:04 pm

With air tools it all comes down to duty cycle. Your basic impact wrench or the like does not require that much if its used off and on a lot. However, die grinders and such that are being used continuously need a compressor that can really put out some CFM.

I too have moved to electric impacts and such. They are just so much nicer to use.

With that compressor, I have a feeling it won't be what you want for a grinder that you will be using regularly. If its for 30 seconds so off and on, you should be fine. You may have to wait now and then. But for prolonged work, way too small.
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Coreyw454
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Re: Air Compressor Size

Postby Coreyw454 » Fri Dec 08, 2017 11:09 pm

Thanks for the replies. You both make good points about electric tools vs air.

1979bettywhite
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Re: Air Compressor Size

Postby 1979bettywhite » Tue Dec 12, 2017 8:58 am

Glad this got posted. Am in the market for a compressor, but in all my research, you guys are correct. For my application, I think I can get away with just using all the electric/lithium equipment. And with all the black friday etc deals out there, it has been hard to justify throwing down $300+ for a solid oiled compressor.

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Re: Air Compressor Size

Postby Adventure_Wagon88 » Tue Dec 12, 2017 11:12 am

I've got my eye on the Eastwood QST scroll compressor down the road. They just came out with it, it's an incredible machine on paper. Their HQ is close to where I live and they often have scratch and dent/RM tools at a heavy discount. Like most said I too have built my shop around electric tools and don't miss the compressor. But I'd like to be able to run a paint gun, blow off tool, sander, and have shop air for a big plasma cutter. The little throw away $25 HF oilless I have does fine for airing tires and the occasional nailer, sheet metal punch, or blow off (given ample time haha). Save your money for a good one but invest in electric stuff in the mean time.

1979bettywhite
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Re: Air Compressor Size

Postby 1979bettywhite » Tue Dec 12, 2017 2:30 pm

Picking up this one for Christmas.

https://www.amazon.com/Senco-PC1131-Com ... 89%3ASenco

Get's great reviews and a great price for what you get. Should be able to run some air tools with this. If I ever do want to run a paint gun or die grinder I may need to look elsewhere. But I don't intend to.

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REDONE
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Re: Air Compressor Size

Postby REDONE » Tue Dec 12, 2017 2:49 pm

You're right that it won't run a grinder or a sprayer, but I have used that exact same compressor (borrowed) to run a framing nailer ( closing up crates the size of cars with 2+3/4 nails) and it kept up just fine. In honesty, I think that's the exact right size for a handy homeowner.
79 J-10 (The Money Badger) KE0LSU
304/Performance Fuel Injection TBI/MTA1/SP2P/Magnum rockers
T18/D20/D44s/33" Mud Claws
Grizzly Locker Rear
4" front spring drop, 5" rear shackle flip
Chevy style HEI (ECM controlled)
Dolphin "Shark" gauges in a fancy homemade oak bezel
3/4 resto, rotting faster than I've been fixing it.

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Lumpskie
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Re: Air Compressor Size

Postby Lumpskie » Fri Dec 15, 2017 5:48 am

I use the Dewalt version of that compressor too. It's great for the impact, air wrench, nail gun and tires. That's all I've used it for but it has held up well for 6 years or so.
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tgreese
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Re: Air Compressor Size

Postby tgreese » Fri Dec 15, 2017 6:54 am

The main reason the pros use air tools is because of the bulk and weight of electric motors. An air turbine is much lighter and more compact than an equivalent electric motor - really makes a difference when you are lifting and holding the tools all day.

Modern electric motors have gotten much more powerful, driven by the market for portable battery-driven tools, I presume. If I did not already have a compressor, I would own an electric impact.
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