Toller wrote:>The clerk at HD didn't know what it was. He got the expert who
said it was
It could be something you smack with a mallet or hammer, that tranfers the
energy into a "righty-tighty/lefty-loosey" direction. There are pneumatic
impact drivers, too, that you might see at the tire changing places. Tom
Someday, it'll all be over....
An Impact Drill is a drill that is used for drilling in to concrete or
other masonary stuff. You can get a good explanation of how it works
From their site:
"Like the name implies, impact drills are equipped with an impact
mechanism that you can switch on when drilling in very hard materials
like concrete or stone. A special mechanism in the gearing pulses the
drill chuck (and thereby the drill bit) forward at a rate of up to
48,000 times per minute. These forward movements help you get more
work done. But be careful! As universally useful as an impact drill
is, the impact mechanism itself may only be used when drilling into
masonry. When drilling in metal, wood, plastics or other more
sensitive materials, always turn the impact mechanism off. This rule
applies also to screwdriving, sanding, or polishing"
You are talking about impact drills, more frequently referred to as "Hammer
drills". An impact screwdriver is completely different.
An impact driver is a tool for loosening stuck nuts or screws. It is
sort of a heavy duty Yankee screwdriver, usually with a socket
attachment on one end and a steel plate on the other. You put it over
the nut or against the screw head, then bash the impact driver with a 2
lb. hammer. It provides a sudden torque that will break the nut or
screw loose, or maybe just break it.
An impact driver is a "driver" in the same sense that a screw driver is
a screw "driver". Screw drivers are for pulling screws, a hammer is for
Actually, the hammer impact also applies force down on the screw
at the same time it turns it. This downward force helps avoid
stripping out the slot in the head, and additionally, "unloads"
the threads a bit, making the screw turn easier. I used to use it
on motorcycles to get loose "frozen" screws.
the guy at home depot is correct. here is a link from makita.
I just bought the Craftsman version. It is awesome at driving long drywall
screws in without stripping thier head.
The Makita and DeWalt use a similar 1/4" hex drive "chuck." The HD
expert must think "chuck" only means the Jacobs version. The extra
"torque" comes from the impacting portion. Sort of like beating on the
end of a wrench.
But, since he said it was a 12v DeWalt, look at this:
Sounds like a 12v electrical version of a pneumatic impact wrench, with
the square drive replaced with cordless screwdriver fitting. It will
spin until a certain resistance is met and then the "impacting" will
kick in to "pulse" the torque to overcome whatever friction would choke
a regular cordless screwdriver.
Looks like they are all limited to 1/4" hex drive bits.
Grandpa Koca - SAHD for 6 - Keeper of the Perpetual Kindergarten
To send me email, see: http://homepage.mac.com/papakoca /
It looks like a eight inch metal tube with a screwdriver sticking out of it.
What it does is set or remove stout machine screws. The stubby ones that
usually are about 3/8" in diameter, and short. The type of machine screws
you take your biggest screwdriver to and can't get it to budge.
What it does is turn, but it uses the energy provided from a blow to its
end, and transfers that to the screwdriver bit. They are reversible, so you
can use them to tighten or loosen. You position the bit in the screw, and
then smack it on the end with a hammer.
Impact driver work by a blow toward the end which cause a screwdriver
or socket to turn. Mechanical ones use a handheld piece that you hit
with a hammer and electrical or air drills have the hammer built into
the mechanism. An impact socket driver is typically what a tire
places uses to remove wheels.
An impact screw driver is a heavy metal device in which different
screwdriver bits can be inserted (they come with the impact driver).
They are used to break loose very tight screws without buggering them up.
Hold the impact screwdriver bit tight in the screw head and hit the end with
a hammer (not low impact hammer). This causes the screw to turn a little
and and when it is loose, a regular screwdriver can be used to finish the
They are most frequently used by mortorcycle owners and mechanics.
You want one? Gpt one I never use anymore.
I got one that is at least fifteen years old. I use it about every three
years. Looks brand new, and is still in its box. But when I need it, I
need it, and nothing else will get out that stubborn screw.
If you get rid of yours, I predict you will need one within one week. It
happens to me every time.
I bought an Ingersol-Rand for use with my air compressor. Boy, could I
tell you stories about rusted in bolts and screws. That impact driver gets
them out, pronto. I don't use it normally, but when one of those stubborn
bolts turns up, the ol' impact driver comes out and really does a number on
it. It sure beats busting a knuckle, or breaking the head off a bolt, or
rounding one out.
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