I see 2 advantages of a high speed air drill. The burr is less prominent and the air drill starts and stops almost instantly. This really increases your efficiency.
You can get a good start with a 2.5 HP 10 gal. OIL lube (see Harbor Freight) air compressor. Later, if you need more, add another to double your cfm and capacity. When the project is over you can take one to the hangar and still have one at home.
Add an 11 gal air tank from Harbor Freight for $40.00 and you end up with 10.6 cfm and 31 gallons of storage for a very small investment and many options when your project is done.
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VAF #897 Warren Moretti
2019 =VAF= Dues PAID
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