"Mark" wrote in message
...
John Rumm typed:

Doctor Drivel wrote:

dills. A 12v impact driver can outperform a 18 or 24v drill/driver
in driving screws. They cam be used as drills too, but are primarily
designed

They are are their best tightening and
freeing nuts/bolts rather than
screws. That is why they typically have
a 1/2" square drive on the end.

Wrong,

Right.

different tool and intended use.
Do read
http://tinyurl.com/9htyt
and try and keep up

It is clear by what you write, that you only have half a clue at best. From
the above link, which I have given already...

Cordless Impact Drivers vs. Cordless Drills - How Do They Compare?

"Although they look like a smaller replica, don't confuse a cordless impact
driver with a standard cordless drill or hammerdrill. The biggest difference
is inside. Unlike a cordless drill - which creates continuous in-line
torque - a cordless impact driver uses an internal spring-loaded pulsating
cam and gear mechanism to create rotational torque. In simple terms, the
effect is similar to that of a hammer wrapping on a wrench to loosen a
stubborn lug nut, only faster."

Cordless Impact Wrenches

"The basic difference between cordless impact drivers and cordless impact
wrenches is the chuck configuration. Impact drivers have a chuck which
accepts 1/4 inch hex-shank bits for screwdriving, drilling, and nut driving.
A cordless impact wrench uses a 3/8 inch or a 1/2 inch square anvil
primarily for driving impact sockets. In addition, the wrenches develop more
torque. Today's cordless impact wrenches, like the ones from DeWALT, now
have enough power to rival many corded electric wrenches, a big plus when
you're up on a lift away from an outlet.
The type of work you're doing will dictate which category to choose - driver
or wrench. For example, if most of your work involves driving self tapping
sheet metal screws or deck screws, an impact driver would be right for you.
If most of your work involves driving large lag bolts or bolting pipe
couplings, a dedicated cordless impact wrench would be a better choice.
Although a cordless impact driver can be fitted with a socket adaptor, the
larger square shaft of the impact wrench will prove more durable for heavy
duty applications."


So, "Impact Divers", do hard driving and can do drilling too. Some have a
detyachable chuck. One model is switchable from a dril/driver to an impact
driver. Check drill specs before buying

Some "Impact Wrenchs" have fixed 3/8" or 1/2" shanks to take sockest ad the
likes.

Some "Impact Drivers" may have 3/8 or 1/2 adaptors, so it can be used as
both. The "drill/driver - Impact Driver" Panasonic can be used for all
functions with suitable adaptors. Not cheap, but maybe worth it if all
functions are used regularly.

Now you know, you can update the FAQ.