Ramon A. asks:
>when i countersink timber for a screwhead my (6 or 8 fluted) bit often
>cavitates and produces a less than smooth csk.
>it seems worse on softer woods.
>please advise how i can improve.
Get a 1 or 2 flute countersink. Otherwise, slow down the one you've got, and if
that doesn't work, add a bit to the speed.
I'm not sure "cavitation" is the word I'd chose, either. Does it form bubbles
or pits? Roughly, I'd guess it just roughs it up more than you like.
Charlie Self
"Politics: A strife of interests masquerading as a contest of principles. The
conduct of public affairs for private advantage. " Ambrose Bierce
>
>when i countersink timber for a screwhead my (6 or 8 fluted) bit often
>cavitates and produces a less than smooth csk.
>it seems worse on softer woods.
>please advise how i can improve.
>rgds Ramon
>
>
Single flute countersink will help. You might also try countersinking before
drilling the holes.
John Martin
It's called chattering, and I agree, a single flute bit cures it.
Charlie Self wrote:
>
> Ramon A. asks:
>
> >when i countersink timber for a screwhead my (6 or 8 fluted) bit often
> >cavitates and produces a less than smooth csk.
> >it seems worse on softer woods.
> >please advise how i can improve.
>
> Get a 1 or 2 flute countersink. Otherwise, slow down the one you've got, and if
> that doesn't work, add a bit to the speed.
>
> I'm not sure "cavitation" is the word I'd chose, either. Does it form bubbles
> or pits? Roughly, I'd guess it just roughs it up more than you like.
>
> Charlie Self
> "Politics: A strife of interests masquerading as a contest of principles. The
> conduct of public affairs for private advantage. " Ambrose Bierce
>
>
>
>
--
Gerald Ross
Cochran, GA
...........................................
It's okay to do the right thing, as
long as you don't get caught.
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Has the bit become dull?
--
Regards,
Dean Bielanowski
Editor,
Online Tool Reviews
http://www.onlinetoolreviews.com
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"Ramon A" <[email protected]> wrote in message
news:[email protected]...
> when i countersink timber for a screwhead my (6 or 8 fluted) bit often
> cavitates and produces a less than smooth csk.
> it seems worse on softer woods.
> please advise how i can improve.
> rgds Ramon
>
>
Or if using a countersink with multiple flutes, have them
at different cutting angles.
--
There is only one period and no underscores in the real email address.
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Or a three flute.
"Gerald Ross" <[email protected]> wrote in message
news:[email protected]...
> It's called chattering, and I agree, a single flute bit cures it.
>
> Charlie Self wrote:
> >
> > Ramon A. asks:
> >
> > >when i countersink timber for a screwhead my (6 or 8 fluted) bit often
> > >cavitates and produces a less than smooth csk.
> > >it seems worse on softer woods.
> > >please advise how i can improve.
> >
> > Get a 1 or 2 flute countersink. Otherwise, slow down the one you've got,
and if
> > that doesn't work, add a bit to the speed.
> >
> > I'm not sure "cavitation" is the word I'd chose, either. Does it form
bubbles
> > or pits? Roughly, I'd guess it just roughs it up more than you like.
> >
> > Charlie Self
> > "Politics: A strife of interests masquerading as a contest of
principles. The
> > conduct of public affairs for private advantage. " Ambrose Bierce
> >
> >
> >
> >
>
> --
>
> Gerald Ross
> Cochran, GA
> ...........................................
> It's okay to do the right thing, as
> long as you don't get caught.
>
>
> -----= Posted via Newsfeeds.Com, Uncensored Usenet News =-----
> http://www.newsfeeds.com - The #1 Newsgroup Service in the World!
> -----== Over 100,000 Newsgroups - 19 Different Servers! =-----
Ramon A wrote...
> when i countersink timber for a screwhead my (6 or 8 fluted) bit often
> ... produces a less than smooth csk.
This is a common problem when a multi-fluted countersink bit is used in a
hand-held drill. Using a drill press (clamp the workpiece) helps. A
single-fluted countersink or a Weldon-type bit is nearly essential when
countersinking with a hand-held drill.
Jim
Hi Ramon,
This is quite common IME. Try running it in reverse if you have an awkward
piece of wood.
HTH
Frank
"Ramon A" <[email protected]> wrote in message
news:[email protected]...
> when i countersink timber for a screwhead my (6 or 8 fluted) bit often
> cavitates and produces a less than smooth csk.
> it seems worse on softer woods.
> please advise how i can improve.
> rgds Ramon
>
>