Just as a sort of reminder to all...
I recently purchased a Makita 6980 FD Cordless Impact Driver. It really is a super bit of kit.. However.. a small safety warning....
I have had two screwdriver tips shatter .. The last bit broke off and hit the face mask I was thankfully wearing traveling a some speed.
See photos here...
You should by better bits then.
So, this will never happen with quality bits? And what about bits of the screw?
Hmmm - perhaps -
The bits came with the Driver - Makita bits..
What would you recommend?
Roy
While I don't agree with the notion that better bits will necessarily last longer when using an impact driver, I do think that a lot of bundled Makita and DeWalt bits are of quite poor quality.
I have several sets of Wera bits, and have been very impressed with them, they seem to last a very long time.
Grunff,
Many thanks for your help...
Yes - good thought - I have some Wera screwdrivers and they are very good...
I believe the bits do need to have this sort of shank,...
Thanks, Roy
I have had these shatter on me using a drill/driver.
I don't believe you'd ever spend more than 5p on a bit set.
Either the bits or the holder - my Wera sets have bit holders like this:
which are necked for shock absorption.
You don't? Wow!
I wonder if you might be able to return it to the shop as not being fit for the purpose...
Hmmm - No, I don't want to do that! It's tooo good !!
Roy
Yep same thing happened to me You need Wiha gold as a minimum spec
Unfortunately Makita, Bosch and DeWalt all supply pretty mediochre bits in their tool bundles. Rather stupid really because they let down what are otherwise excellent tools.
The only screwdriver/drill manufacturer that I have found who does supply good quality bits with tools and separately is Festool.
In terms of good quality screwdriver bits, I tend to use products made by Wera and Wiha.
Having said that, I wonder whether using Pozidriv screws is a good idea with an impact driver anyway. Cam out is a problem with them at the best of times and nurges the bit as well. From the photo, it looks as though that had been happening before the bit broke. Adding impact driving to the mix makes the effect worse.
Generally Torx screws and bits seem to work a lot better from the perspective of avoiding camout. I tend to use them for most purposes now, although I haven't tried them for impact use. Might be worth a try.
Matt, what impact driver do you have to try it out on?
That will make is rather mor likely than less I would expect - better bits tend to be harder. I have had Wiha diamond pozi bits shatter in my
18V combi before now.
Yes - I think I agree - Posidrive + Impact driver probably not a good idea.
Roy
|> Having said that, I wonder whether using Pozidriv screws is a good |> idea with an impact driver anyway. Cam out is a problem with them at |> the best of times and nurges the bit as well. From the photo, it |> looks as though that had been happening before the bit broke. |> Adding impact driving to the mix makes the effect worse. |>
| |Yes - I think I agree - Posidrive + Impact driver probably not a good idea.
Definitely Posidrives need a nice even torque, just enough to drive them in.
'Nurges'? Is this a technical term I'm unfamiliar with?
:-)
It's a word I've always used (as in nurged up) for things like stripped or crossed threads, cammed out screws that can no longer be driven either way, basically anything where there has been some mechanical effect that prevents the item from being put in or taken out.
Another typical example is where you change a float valve for one with a plastic thread. The right way to do this is to get the nut of the tap connector on with the back nut that holds it onto the tank/cistern loose. If you do it the other way, Sod's law dictates tha tthe plumbing won't be well enough aligned and the tap connector nut will go on cross threaded. There is more than an even chance, if you are heavy handed, that the thread of the valve will be nurged up.
The effect can be compounded of course because typically then something heavy/rough/risky is going to have to be used to get the thing out or put it all the way in
This is a usefully inoccuous expression that you can use in the presence of elderly spinsters when you are fixing their plumbing and something bad happens. Of course, they might ask you whether you f*cked it up, but then at least you know where you are. :-)
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