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Impact Bits for Manual Impact driver

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seber

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May 31, 2016
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Shockwave bits are 1/4". Too small for the driver. I've never seen Manual impact bits sold separately. If they don't come with the driver, you are going to be doing a lot of searching.
 

dogdog

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Nov 15, 2011
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the head is separable to drive 1/2" sockets.... maybe use a 1/2" impact drive extension?

I just know these bits are 3/8 impact drivers, the common normal ones they sell at most places are 1/4 driver bits... you might want to search for "3/8 impact driver bits", not sure who makes a longer version though...

this tekton 2915 is the longest I have seen.. I know sears used to sell individual 3/8 driver bits for these manual drivers... not sure who sells them now.
 

RTM

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I got an individual bit from Lisle, but they are 5/16 I think, and short, but they may have more.
 

Can I try?

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SE PA
The bits for manual impact drivers are 5/16" shank, not the more common 1/4" shank. Long bits do exist, but they are not readily available at the consumer level. Apex manufactures long 5/16" bits, but their focus is the industrial market.

I think the simplest, and least expensive, solution to your search is to purchase a 1/4" bit adaptor for your driver.
 
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cheechi

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Feb 29, 2012
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Triad, NC
Ko-ken offers 5/16" impact bits in 32mm, 80mm, 125mm lengths.

this is probably the best answer to the question as presented.

most of these are going to be either 1/2" or 3/8" square that most then have an adapter to use 5/16" bits. I haven't seen a longer 5/16" bit than the standard that comes with the sets in person but i knew they exist; generally if its just length and not a recessed screw you are meant to use a 3/8" or 1/2" impact extension if you need more reach, but these aren't great at getting into tight spaces as you still need space to swing a hammer.

You can look into the Vessel Impacta drivers for something more compact if needed. There were a pair P2 & /5/16 blade rebranded by Craftsman, in case importing from USA is easier for you than importing from Japan.
 

SuperCat

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Jan 6, 2012
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Sacramento, CA
I had picked up an impact driver kit w/o bits in a plastic blow mold case a few years ago at the flea for only a couple of bucks and completely forgotten about it. The Tekton bit set for $7.76 is going on my next Amazon order. Thanks for the link, seagull! :thumbup:
 

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rlitman

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The bits for manual impact drivers are 5/16" shank, not the more common 1/4" shank...

I have a manual impact driver with a 1/2" square drive that turns a 5/16" hex bit adapter. That's the most common type. But I also have one with a 3/8" square drive turning a 1/4" hex bit adapter. That one was HF IIRC. I have also seen impact drivers that took 5/16" square shank bits, so there are several variations out there.

Anyway, as with any impact tool, the longer and lighter the extension, the less impact you get out of the tool. In other words, using a long bit on a manual impact driver is just plain stupid. You may as well use a screwdriver, because no impact will make it through a long bit. You can however extend the square shank.
 

richfinn

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Leeds, Yorkshire, England
My Impact driver is 1/2" drive (part of the dynomec locking wheel nut removal tool)

I just us a 1/2" to 1/4" hex adaptor for tight screws
 

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seagull369

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Jan 16, 2013
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I have a manual impact driver with a 1/2" square drive that turns a 5/16" hex bit adapter. That's the most common type. But I also have one with a 3/8" square drive turning a 1/4" hex bit adapter. That one was HF IIRC. I have also seen impact drivers that took 5/16" square shank bits, so there are several variations out there.

Anyway, as with any impact tool, the longer and lighter the extension, the less impact you get out of the tool. In other words, using a long bit on a manual impact driver is just plain stupid. You may as well use a screwdriver, because no impact will make it through a long bit. You can however extend the square shank.

Using a socket tool extension won't help if the screw youre trying to remove is recessed with a tight clearance.

You're already using a twisting motion (lefty losey, righty tighty) on the tool prior to striking it with a hammer, so I don't think you're going to lose much twisting force just because the bit is a little longer,
 

rlitman

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Using a socket tool extension won't help if the screw youre trying to remove is recessed with a tight clearance.

You're already using a twisting motion (lefty losey, righty tighty) on the tool prior to striking it with a hammer, so I don't think you're going to lose much twisting force just because the bit is a little longer,

The problem is that the bit acts like a torque stick and winds up like a spring under impact, limiting how much impact torque is transmitted.

If you really want an impact screwdriver, just buy a Vessel 980 series Impacta, so you don't lose all of the impact between adapters.
 
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