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Old 01-19-2011, 03:08 PM   #61
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Impact Driver - Why?


Getting back to the OP's original question of why. Because you can build a 12x20 pressure treated deck and end with the same phillips bit that you started with. Because you can build that deck without camming out any screw heads. Because it will run the lag screws in just as easily as the coated deck screws. And because it is one more cool tool to own and your brother-in-law can drool over.
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Old 01-19-2011, 03:23 PM   #62
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because it is one more cool tool to own
This is really the best answer in the whole thread.
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Old 01-19-2011, 03:44 PM   #63
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Originally Posted by Maintenance 6 View Post
Getting back to the OP's original question of why. Because you can build a 12x20 pressure treated deck and end with the same phillips bit that you started with. Because you can build that deck without camming out any screw heads. Because it will run the lag screws in just as easily as the coated deck screws. And because it is one more cool tool to own and your brother-in-law can drool over.
You, my friend, are a real man!
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Old 01-19-2011, 04:22 PM   #64
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Well there certainly is a lot of conflicting information out there on how these things work....
http://www.doityourself.com/stry/how-does-an-impact-driver-work
http://impactdriver.org/

There are a number of sources that state that a downward force is applied..others are silent on the point...and I haven't found one yet that explicitly states NO downward force is applied. However, the many posts in this thread stating that no downward force is applied cannot be ignored ...despite the fact that, just like Wikipedia, anyone can add to the thread...and unlike wikipedia there is no content accuracy oversight. Does that make this thread LESS credible than Wikipedia? I don't think so. To remove any doubt I spoke with Makita and confirmed that impact drivers and impact wrenches basically work the same way...just different interfaces to bits/sockets, variations in torque, etc. I stand corrected from my prior statements regarding downward force being applied with impact drivers.

Lastly, and back on track to the OP...I have the Makita 18V impact driver and find it to be a great tool. But I also do a lot of my own automotive work and am considering picking up their impact wrench as well.

PS. So who is going to update the Wikipedia entry on impact driver functionality? After all..anyone can edit...
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Old 01-19-2011, 04:28 PM   #65
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....Because you can build a 12x20 pressure treated deck and end with the same phillips bit that you started with. .....
And, if you were using a #2 Robertson bit and screws, you could probably start and end the summer with the same bit.
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Old 01-19-2011, 06:13 PM   #66
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The downward force is intened for breaking loose siezed or rusted fastners. It is a very effective technique. Obviously, it is a technique used more often in mechanical work than wood contruction work.

yea but its got nothing to do with what we were talking about
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Old 01-19-2011, 06:16 PM   #67
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Originally Posted by piste View Post
Well there certainly is a lot of conflicting information out there on how these things work....
http://www.doityourself.com/stry/how-does-an-impact-driver-work
http://impactdriver.org/

There are a number of sources that state that a downward force is applied..others are silent on the point...and I haven't found one yet that explicitly states NO downward force is applied. However, the many posts in this thread stating that no downward force is applied cannot be ignored ...despite the fact that, just like Wikipedia, anyone can add to the thread...and unlike wikipedia there is no content accuracy oversight. Does that make this thread LESS credible than Wikipedia? I don't think so. To remove any doubt I spoke with Makita and confirmed that impact drivers and impact wrenches basically work the same way...just different interfaces to bits/sockets, variations in torque, etc. I stand corrected from my prior statements regarding downward force being applied with impact drivers.

Lastly, and back on track to the OP...I have the Makita 18V impact driver and find it to be a great tool. But I also do a lot of my own automotive work and am considering picking up their impact wrench as well.

PS. So who is going to update the Wikipedia entry on impact driver functionality? After all..anyone can edit...
I'm glad that got resolved. Just to add a couple thoughts...if an impact hammered, you would have a hard time keeping the driver bit on the screw or the socket on the nut. Hammer drills do apply the downward, or axial force, to aid in busting through hard materials like brick and concrete. Wiki is an interesting source of knowledge, but I always wonder how much truth it contains. It's really just a collaborative rumor mill. Your only hope is that someone knowledgeable comes along and corrects the non-truths. Maybe I'm too skeptical.
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Old 01-19-2011, 07:55 PM   #68
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Impact Driver - Why?


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Originally Posted by hyunelan2 View Post
This is really the best answer in the whole thread.
I liked this part better:

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your brother-in-law can drool over.
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Old 01-19-2011, 08:01 PM   #69
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piste;573907]..and I haven't found one yet that explicitly states NO downward force is applied.
yes you have; ME. I went and checked mine twice just because of this thread, although I was certain I was correct before I checked.


Quote:
To remove any doubt I spoke with Makita and confirmed that impact drivers and impact wrenches basically work the same way...just different interfaces to bits/sockets, variations in torque, etc. I stand corrected from my prior statements regarding downward force being applied with impact drivers.
that's a Hell of a man to come back and admit it. You get a from me.
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Old 01-19-2011, 09:08 PM   #70
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yes you have; ME. I went and checked mine twice just because of this thread, although I was certain I was correct before I checked.


that's a Hell of a man to come back and admit it. You get a from me.
Just the way I am. But I'll go one better than that...let's see if it sticks...third paragraph last sentence...and paragraph four....http://en.wikipedia.org/wiki/Impact_driver
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Old 01-20-2011, 06:40 AM   #71
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Old 01-20-2011, 09:55 AM   #72
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Impact Driver - Why?


http://www.sears.com/shc/s/p_10153_1...1&blockType=G1


This is the impact driver that is being confused with a cordless impact driver in this discussion. Wiki just doesnt have it right this time.
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Old 01-20-2011, 11:56 AM   #73
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Impact Driver - Why?


I, too, think wikipedia has it wrong in this case. I have a dewalt and rigid impact driver. Neither applies a downward force as near as I can tell. Neither did I expect them to do so.

I have always understood such tools to be called "hammer" drills, as opposed to "impact" drills/drivers/wrenches. One can definitely feel the downward impulse forces of a hammer drill and this is not present on any of the impact tools that I own. I would dare say that the hammer action would actually be detrimental to installing a screw...I suspect it would knock the tool bit OUT of the screw head.

Yes, my brother-in-law drools over these tools.

Last edited by oberkc; 01-20-2011 at 11:59 AM.
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Old 01-20-2011, 12:08 PM   #74
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Impact Driver - Why?


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Originally Posted by STL B. View Post
http://www.sears.com/shc/s/p_10153_1...1&blockType=G1


This is the impact driver that is being confused with a cordless impact driver in this discussion. .
Yep...I own that one in addition to my cordless Makita.

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Wiki just doesnt have it right this time.
It does now.
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Old 01-25-2011, 11:27 PM   #75
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Impact Driver - Why?


I recently drilled approximately 50 holes with my Makita BTD141 and a couple Irwin Speedbor bits (http://www.amazon.com/Irwin-Industri.../dp/B000LQ905E) through 120-year-old 2-3 inch studs and joists for a wiring project.

To use an old and tired saying, it was just like a hot knife through butter. I hate to think what my wrist would feel like if I'd used a regular drill. The impact action of the driver sends the bit through the wood without transferring any torque to the user. Never once did the impact driver twist in the hole and wrench my wrist.

Great tool, wish I'd had one 20 years ago.
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