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Old 01-18-2011, 07:55 AM   #31
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Impact Driver - Why?


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i think the word percussion would more defining
Yeah, I think that's accurate. We could also probably campaign for the word vibrate.


Hey - I'm going to be building a couple decks this summer. I've actually got my eye on an 18v DeWALT Impact Driver (already have an 18v kit), and am waiting for it to go on sale. Do you have any experience with the DeWALT? Good, bad, ugly? Got a better recommendation?

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Old 01-18-2011, 08:02 AM   #32
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Impact Driver - Why?


Makita sells both impact drivers and impact wrenches. They look identicle based on the web site pics. The Impact wrenches delivers higher torque and have a 3/8" square drive. The Impact drivers have the 1/4" socket drive. The web site does not describe how the impact hammer works.
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Old 01-18-2011, 08:09 AM   #33
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Impact Driver - Why?


The wikipedia site does have some good info.
http://en.wikipedia.org/wiki/Impact_driver
http://en.wikipedia.org/wiki/Impact_wrench

It makes sense. According to this the impact driver is intended for screws and other similiar fastners. The impact wrench is intended for nuts and bolts where a downward force is not needed and potentially damaging.
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Old 01-18-2011, 08:22 AM   #34
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Impact Driver - Why?


Quote:
Originally Posted by DrHicks View Post
Yeah, I think that's accurate. We could also probably campaign for the word vibrate.


Hey - I'm going to be building a couple decks this summer. I've actually got my eye on an 18v DeWALT Impact Driver (already have an 18v kit), and am waiting for it to go on sale. Do you have any experience with the DeWALT? Good, bad, ugly? Got a better recommendation?

the dewalt is a good one
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Old 01-18-2011, 08:28 AM   #35
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Impact Driver - Why?


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Originally Posted by beerdog View Post
The wikipedia site does have some good info.
http://en.wikipedia.org/wiki/Impact_driver
http://en.wikipedia.org/wiki/Impact_wrench

It makes sense. According to this the impact driver is intended for screws and other similar fasteners. The impact wrench is intended for nuts and bolts where a downward force is not needed and potentially damaging.

they are confusing 2 different impact drivers,the hand one uses the downwards force of a hammer blow and converts it to a rotational action

the cordless impact drivers we are talking about ARE just like the impact wrenches that mechanics use
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Old 01-18-2011, 08:33 AM   #36
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Impact Driver - Why?


As far as the torque control:
Most of the time when driving screws we want a certain level of countersink, we can control that on a drill/driver with the torque settings.
An impact provides a great deal of torque but doesn't turn the screw very far on each hammer blow.
Because each little hammer blow is at full torque, you can hit the trigger to drive it in just a little farther.
Pushing in a 3" screw "just a little farther" is difficult with a drill driver, but this is where an impact excels.

Long story short: because of the way an impact driver works you don't need adjustable torque settings the way you do on a drill/driver.
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Old 01-18-2011, 08:40 AM   #37
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Impact Driver - Why?


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Originally Posted by tomstruble View Post
the dewalt is a good one
Good! I assumed so. DeWALT isn't a top-of-the-line product, but pretty good. I've been happy with all my DeWALT tools. And since I already have most of the 18v DeWALT tools, adding the impact driver would make sense.

Thanks!

Last edited by DrHicks; 01-18-2011 at 09:26 AM.
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Old 01-18-2011, 08:50 AM   #38
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Impact Driver - Why?


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Originally Posted by tomstruble View Post
they are confusing 2 different impact drivers,the hand one uses the downwards force of a hammer blow and converts it to a rotational action

the cordless impact drivers we are talking about ARE just like the impact wrenches that mechanics use
Read it again. It is very clear...and DOES distinguish between the manual and power impact drivers. You are the only one confusing things....
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Old 01-18-2011, 10:28 AM   #39
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Impact Driver - Why?


They only rotate no downward force is applied from the tool just from the user. If it did it would bounce the tip out of the fastener head and besides that screws pull themselves thru from rotational force. I think wiki doesnt have it right on this one. You can read the discriptions from all the tool makers on their websites and nowhere does it state downward force.
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Old 01-18-2011, 11:43 AM   #40
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Impact Driver - Why?


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Originally Posted by piste View Post
Read it again. It is very clear...and DOES distinguish between the manual and power impact drivers. You are the only one confusing things....
you really should try using onethere is no need to hammer a screw,bolt or nut in,the only pressure needed or wanted is to keep the bit engaged in the screw tip...so your saying when you need to remove a screw you hammer it out?

you believe what you want tho i don't care
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Old 01-18-2011, 12:22 PM   #41
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Impact Driver - Why?


The problem with Wiki is that anyone can add and edit.
Piste, there is no downward force to an impact driver.
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Old 01-18-2011, 12:27 PM   #42
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Impact Driver - Why?


i first used one a couple of months ago at my father in laws when we were installing a tray ceiling in his garage so the 69 chevelle SS would fit when his lift was all the way up and i fell in love. after all these years of using a drill/driver, what the hell was i thinking? i just converted my loft into a bedroom and was tempted to not even get out the framing nailer and just do it all with screws... never before has screwing been so much fun (pun intended).

I still used the drill/driver for the drywall, but for driving screws in wood, there is nothing like it. I got the 18v DeWalt drill/driver and impact driver combo for xmas (my last drill/driver had died when i had finished my basement) and so far i love it. one hour charger works great and even though they are not the XRP units, the charge on the batteries lasts a good amount of time.
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Old 01-18-2011, 12:32 PM   #43
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Impact Driver - Why?




Ok, again, I went and checked mine, again. It does NOT have a linear impact action. It is ONLY a rotational impact. The pic is a blow up of my gun. Notice #9, #10, and #11. That is what "impacts". There are no facilities for it to provide a linear or downward impact but only a rotational impact.

So, everybody go and check yours. I would put money on every one of them acting the same.

Wikipedia is only as reliable as the people that edit it and that happens to be everybody on the planet. It is an open source information system and if somebody like piste posts that an impact driver has linear impact forces and nobody ever corrects it, that is how it will stay.


So Piste, have you checked yours to see how it works? I would suggest it.

Last edited by nap; 01-18-2011 at 12:35 PM.
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Old 01-18-2011, 12:40 PM   #44
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Impact Driver - Why?


Here's a good operational cutaway video of the inside workings.
http://www.finehomebuilding.com/how-...t-drivers.aspx
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Old 01-18-2011, 12:46 PM   #45
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Here's a good operational cutaway video of the inside workings.
http://www.finehomebuilding.com/how-...t-drivers.aspx
Great video!

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