K2 - Countersunk Screws?

[Bruce W1UJR]

Looking at the new K3 has me admiring the slick countersunk external  
hardware.
I'm wondering how hard it would be to duplicate this with my existing  
K2 panels?
Has anyone done this, and would it simply involve using a larger  
drill bit to form the countersunk opening?

Tnx ES 73 Bruce W1UJR
www.w1ujr.net
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[Ken Kopp]

Bruce,

Use a drill bit's tip as a countersink tool?  Oh dear!

There are "real" countersink tools available that will
produce nice, even countersinking.  Inquire at a
machine-tool supplier.  They come in a variety of
sizes amd have a smooth conical tip with a single
round hole forming the cutting surface.  The drill bit
idea, unless done very carefully by hand, is certain to
produce "three-cornered" countersinking.

I've thought of using flat or oval-head SS screws on
my K2 but I'd first want to be certain the panels are
thick enough to allow proper-depth countersinking.

73! Ken Kopp - K0PP
[hidden email]

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[Ken Kopp]

Also, the angle of the edge of a correctly countersunk
hole is different than the angle of the cutting edge of a
drill bit.

73! Ken Kopp - K0PP
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[David Cutter]

Countersinking in thin sheet metal generally gives poor results.

David
G3UNA

>
> From: "Ken Kopp" <[hidden email]>
> Date: 2007/04/30 Mon PM 12:48:13 BST
> To: <[hidden email]>,  <[hidden email]>
> Subject: [Elecraft] K2 - Countersunk Screws?
>
> Bruce,
>
> Use a drill bit's tip as a countersink tool?  Oh dear!
>
> There are "real" countersink tools available that will
> produce nice, even countersinking.  Inquire at a
> machine-tool supplier.  They come in a variety of
> sizes amd have a smooth conical tip with a single
> round hole forming the cutting surface.  The drill bit
> idea, unless done very carefully by hand, is certain to
> produce "three-cornered" countersinking.
>
> I've thought of using flat or oval-head SS screws on
> my K2 but I'd first want to be certain the panels are
> thick enough to allow proper-depth countersinking.
>
> 73! Ken Kopp - K0PP
> [hidden email]
>
> _______________________________________________
> Elecraft mailing list
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> You must be a subscriber to post to the list.
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>
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>

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[Mike Morrow-3]

>Looking at the new K3 has me admiring the slick countersunk external  
>hardware.  I'm wondering how hard it would be to duplicate this with
>my existing K2 panels?

One has been able to admire that type of Elecraft construction since the appearance of the K1 almost seven years ago.  The K1 has always had countersunk flathead screws on the cabinet sides and top.  It's a very nice effect that, until the appearance of the K3, was not duplicated on other Elecraft radios.

Mike / KK5F
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[Fred N. van Kempen]

I did that about a year ago, works fine.  I ordered a bunch of
different screws from Lisa (the one that goes underside the VFO
knob, to lock down the multiturn pot) and then did the job of
cautiously 'drilling' the sink-angles.  

The body DOES get a little weaker this way, but it's still fine
because there's many screws to do the job.

Cheers,

Fred PA4YBR (K2/100 #05331)

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Mike Morrow
Sent: maandag 30 april 2007 16:37
To: [hidden email]; [hidden email]
Subject: Re: [Elecraft] K2 - Countersunk Screws?

>Looking at the new K3 has me admiring the slick countersunk external
>hardware.  I'm wondering how hard it would be to duplicate this with my

>existing K2 panels?

One has been able to admire that type of Elecraft construction since the
appearance of the K1 almost seven years ago.  The K1 has always had
countersunk flathead screws on the cabinet sides and top.  It's a very
nice effect that, until the appearance of the K3, was not duplicated on
other Elecraft radios.

Mike / KK5F
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