The Best Drill for aluminum sheet metal
What is best in an air drill for aluminum work on an airplane? #1 Speed, #2 User friendly, #3 comfort, #4 quiet, #5 reversible. For aluminum 2000+ RPM is needed. A drill that is user friendly will accept the drill and accessory sizes you need to use and will be easy to change bits/tools. A keyless chuck is the best way to accommodate this. A drill should be comfortable in your hand. A drill should be quiet. Some air drills like the Sioux palm drill are very quiet. Many builders are going to high speed battery operated drills which are also quiet. Reversible -- well, I threw it in but have never owned one myself. That's why it's at the end of the list. I've never seen a worn out reversing trigger on a used drill.
Reports from the International Builders' Show.
 We hadn’t even left our hotel when we saw one of the first cool things. Stabila levels met us for breakfast and brought three new tools.
They just came out with two new levels with digital readouts and audio alarms. This is good for three reasons. First, it tells you very quickly exactly the angle you’re looking at. I don’t know about you, but I’m really not capable of determining much more than whether a bubble is in the middle of the lines. Second, the audible tone lets you know when you’ve hit your angle if you can’t see the display. When you’re higher than the angle you want, the tone beeps high; when you’re lower, it beeps low. When you hit the angle, you get a flat tone. One day of working in a basement, and you’ll appreciate that. Best of all, though, you can set any angle you need, and the tone will tell you when you hit it. Stabila VP Mike Frazier told us this was originally developed primarily for use in building accessibility ramps, but anyone who’s tried to remodel around stairwells, especially in older houses, knows that a 45-degree angle is a rarity.
These aren’t the first or even the cheapest electronic levels you can get. M-D Building Products SmartTool electronic levels will do just about anything the new Stabilas will for less cash, but for just a little bit more you get a product made in Germany. Plus, Stabila made this thing run on AAA batteries, rather than 9-volts, which assists me in my crusade to eliminate the 9-volt battery from my life.
When Having a Small Impact Is a Good Thing
 Its amzaing to see what some of the manufacturers are doing with lithium ion battery technology. For the most part, they have either used it to create lighter versions of existing cordless tools, or high-voltage tools that would be too heavy to use with older battery technologies.
Bosch however, seems to have also used the opportunities presented by lithium ion to dream up tools that have never even existed. Last year, they scored big hits with the Pocket Driver, which redefined ideas about drills and screwdrivers at the same time.
This year, they've extended that out-of-the-box thinking to impact drivers, with the Litheon "Impactor", and it is another jaw-dropper.
Impact drivers are smaller and lighter than cordless drills, but because they have a simple hammering function and are geared specifically to spin fast, they produce about three times the torque of a drill. This means an impact driver will put in screws, bolts, and other fasteners much faster than a drill would. They can drill holes, too. What they won't do is drill holes bigger than 1/2 inch, but they'll handle just about any job a homeowner or contractor would do around the house.
In size and feel, the Litheon "Impactor" is very much like the Pocket Driver. It's small and light enough to fit into a drawer. Hitched to your belt, you could carry it around all day and barely notice the weight, although it looks so cool, you're definitely going to want to keep taking it out. With the three LED lights on the front, Bosch has not only made sure this thing doubles practically as a spare flashlight, they've really solidified the space-age ray gun look, and it's pretty hard not to pull it out just to play. But with the hammer action on top of the respectable 10.8 volts of power, this can do even more than the Pocket Driver could.
International Builders' Show - More Impact
Makita wheeled out their new 7.2-volt lithium ion cordless straight line impact driver. It's not much different from existing cordless screwdrivers. It works straight or in right-angle format. With the hammer action and higher voltage, however, it gives you about twice the torque of other cordless screwdrivers. And at $100, it's not much more than most 3.6-volt regular power screwdrivers.
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