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1. 07:09 PM - Quiet Drills (Merems)
2. 11:03 PM - SEC: UNCLASSIFIED : Quiet Drills (Francis, David CMDR)
Message 1
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--> RV7-List message posted by: "Merems" <merems@cox.net>
I have seen posting from builders about there mega compressors and their air drills.
Everyone knows that if your really are going to be an airplane builder
you must use air drills. Just about every major aircraft company uses air drills,
so they must be the right choice.
Well here is some real food for thought if you haven't made the plunge yet. I
image most builders build there RV's in their garage. Most of these garages maybe
attached to their homes and many are in a neighborhoods. I used electric
drills on my RV-4 and I thought I would graduate up to the big leagues with an
air drill on my RV-7 project. I have been eyeing that big 60 gallon upright
220 Volt Husky compressor at Home Depot for years. My time had come, I was going
to load that baby in the back of my pickup and join the few, the proud the,
"real" builders. Then I saw it, on sale, price reduced, a CH air drill at
Home Depot. I thought to my self, I can buy it an see if it has a good "teasing"
throttle on it. This is important because without slow speed control of the
drill, it will very hard to use. So I bought it and took it home and hooked
it up to my 20 gal. 110 volt compressor I have had for 20 years. I wanted to
see how loud the drill was and how many holes I could drill until the compressor
would startup. I got about 5 holes drilled and the compressor chimed in.
I had the pressure set to 65-70 psi. Not only was the whine of the air drill
motor and the compressor cranking in to stay up with every 5 holes annoying
to my ears, but the spitting of the light oil from the air drill onto my hands
and onto the parts I was drilling made matters intolerable. Seeing that I could
barely tolerate the noise in the shop, my neighbors would have to endure some
of the collateral noise coming from my shop. Considering there are over 10,000
rivets in an RV, my compressor would mostly be running continuously when
I would be drilling and a few pints of oil (exaggerated) would be misting on
my parts. If I bought the 60 gallon compressor it wouldn't run as much, but still
quiet a bit.
After considering the noise (to me and my neighbors-which might just be your wife
in the room next to the garage), the oily mess, the cost of the Mega compressor,
I decided the electric drill worked before and it will work again. I researched
what was available on the market and was disappointed by the weight of
many of the electric drills out there. If you buy the cheep electric drills,
they won't last through the project. I settled on a Makita 6410 3/8 VSR 2200
RPM. It has a low noise rating and is 1/2 lbs or so lighter then any other
"quality" drill on the market. I bought it for $32.00 delivered (Tool King).
Van talks about cutting speeds of 2000-3000 rpms to drill aluminum. Since most
of the new RV kits are pre-punched, you are not drilling out a lot of material.
In fact, I find that I run my drill rather slowly most of the time. When
I microstop machine countersink is when I run my drill at full bore.
Food for thought.
Paul
Message 2
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--> RV7-List message posted by: "Francis, David CMDR" <David.Francis@defence.gov.au>
Paul,
I do not wish to disagree with your very well reasoned arguments. However my
experience has been different.
Rule # 1 is "you get what you pay for". A good quality compressor of at
least 17cfm will be quiet and will operate intermittently except only for a
die grinder.
Makita and Bosch electric drills, plus some other brands are good quality
drills. However they are electric and there is a real issue of swarf buildup
over time maybe leading to a zap. This is aside from the weight and size
over an air drill.
I have a Shimano air drill that does 5,000rpm cost US$150, is fairly quiet,
has a teasing trigger and has never ever dripped oil. Its beautiful to use,
compared to my other air drill, a cheapie US$60, 1,700rpm deal that is
pretty rough. My air nibbler does deposit oil, which lubricates and cools
the cutting bit.
I need the compressor anyway to drive the rivet gun, so I got a good
compressor. So having used lots of electric tools in wood work for many
years I am gradually converting to air tools.
Have fun, David Francis, VH-ZEE
Email: David.Francis@defence.gov.au <mailto:David.Francis@defence.gov.au>
After considering the noise (to me and my neighbors-which
might just be your wife in the room next to the garage), the oily mess, the
cost of the Mega compressor, I decided the electric drill worked before and
it will work again. I researched what was available on the market and was
disappointed by the weight of many of the electric drills out there. If you
buy the cheep electric drills, they won't last through the project. I
settled on a Makita 6410 3/8 VSR 2200 RPM. It has a low noise rating and is
1/2 lbs or so lighter then any other "quality" drill on the market. I bought
it for $32.00 delivered (Tool King).
Van talks about cutting speeds of 2000-3000 rpms to drill
aluminum. Since most of the new RV kits are pre-punched, you are not
drilling out a lot of material. In fact, I find that I run my drill rather
slowly most of the time. When I microstop machine countersink is when I run
my drill at full bore.
Food for thought.
Paul
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