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Electric Drill Bit Slippage Edge 08-12-2008
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Posted by Edge on August 12, 2008, 8:18 am


I have a Craftsman 19.2 volt drill with a half inch chuck. Many times,
especially while pressing hard into the material being drilled, the
bit slips. No matter how much I tighten the chuck, the bit continues
to slip. Other than replacing the chuck, which isn't worth it, what
can be done? Is there a spray of some sort or something else to
provide a better grip on the bit.

Posted by dpb on August 12, 2008, 8:25 am


Edge wrote:
...
> ... Other than replacing the chuck, ...

Nope, unless it's just dirty or the bits are galled. Sorry chucks are
sorry chucks, sorry... :)

--


Posted by John Grabowski on August 12, 2008, 9:01 am



>I have a Craftsman 19.2 volt drill with a half inch chuck. Many times,
> especially while pressing hard into the material being drilled, the
> bit slips. No matter how much I tighten the chuck, the bit continues
> to slip. Other than replacing the chuck, which isn't worth it, what
> can be done? Is there a spray of some sort or something else to
> provide a better grip on the bit.


It seems to be characteristic of many keyless chucks. I have less of a
problem with slippage using hex bits.


Posted by terry on August 12, 2008, 10:36 am


>
>
> >I have a Craftsman 19.2 volt drill with a half inch chuck. Many times,
> > especially while pressing hard into the material being drilled, the
> > bit slips. No matter how much I tighten the chuck, the bit continues
> > to slip. Other than replacing the chuck, which isn't worth it, what
> > can be done? Is there a spray of some sort or something else to
> > provide a better grip on the bit.
>
> It seems to be characteristic of many keyless chucks. =A0I have less of a
> problem with slippage using hex bits.

Know whjat you mean especially 'getting older' keyless chucks!
Grind a couple of flats onto the drill bit/s. For hard drilling
anyway.
Some are probably already scarred from the slippage?

Posted by k on August 12, 2008, 10:48 am


You can grind 3 flats on the drill bits which if not done exactly
symetrical will make the drill bit wobble. Aside from tightening the
chuck with a key, it's the chuck thats letting you down and would need
to be replaced. Sears may give you a new drill if you explain the
problem, I think they have fairly good customer service.

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