[Boatanchors] CCW drill bits

[Carl]

If drilling becomes necessary then use a very small bit immersed in a tap 
oil and going up in size until you can used a standard size tap.  You might 
even get enough bite just with a drill bit to break it free and down into 
the hub.

Carl
KM1H


----- Original Message ----- 
From: "Todd, KA1KAQ" <ka1kaq at gmail.com>
To: "Al Parker" <anchor at ec.rr.com>
Cc: <boatanchors at mailman.qth.net>
Sent: Wednesday, December 15, 2010 10:18 AM
Subject: Re: [Boatanchors] CCW drill bits


> On Wed, Dec 15, 2010 at 9:15 AM, Al Parker <anchor at ec.rr.com> wrote:
>> The problem with screw extractors "Easy
>> Outs", is that they need to operate inside a hole in the item to be 
>> removed,
>> and I've never seen one small enuf to do what you need
>
> Made even worse by the fact that those spinner knobs use a much
> smaller screw than the regular knobs use - maybe the smallest Bristo
> screw used, even.
>
> And if epoxy runs a risk of getting into the threads, so does a drill
> bit spinning at however many RPMs. If the damage isn't too bad, you
> can probably re-tap the brass insert fairly easily.
>
> I've also had luck going the route Dave mentioned, the small jeweler's
> screwdriver wedged into what's left of the hole in the head.
>
> Something else to keep in mind: since the knob is already off the
> shaft, you have the option and benefit of continuing to turn the screw
> in rather than trying to back it out through dirty or damaged threads.
> I'd give it a little WD40, CaiLube, whatever you have on hand that
> will lubricate and loosen without damaging the bakelite, then work a
> jeweler's screwdriver into the head. If the head is chewed up badly
> from trying to loosen it, perhaps there's still enough bite turning CW
> to crank it through.
>
> ~ Todd,  KA1KAQ/4
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