[HBR] HBR-13 Progress

[Lorne Barber]

Hi Scott, I have had decent success starting off with a small bit and
working my way up to the size required, after center punching of course.
A good point on sharp bits, I am as guilty as anyone trying to get "one
more" hole from a dull bit.
Good luck es 73.
Lorne
VE7BOX

-----Original Message-----
From: hbr-bounces at mailman.qth.net [mailto:hbr-bounces at mailman.qth.net] On
Behalf Of Whitebear1122
Sent: April-06-14 5:03 PM
To: HBR Receiver List
Subject: Re: [HBR] HBR-13 Progress

When using the hand drill on the chassis I use a center punch and put a
divit into the aluminum and then come in with the drill at slow speeds.  The
larger the drill bit size the greater error I have.  You bring up a good
point on the sharp bits though.  I'm using my ancient bits which are likely
contributing to the problem.  I'll buy some new bits this week.

On my 17" x 12"x 3" chassis I put a piece of 4"x4" cedar inside the chassis
to drill against, then I use some Quick Grips to hold the chassis to the
bench.  Center the drill bit on the divit and drill.  

Are you able to get accurate location for large bits like 3/8" or 1/2"?  The
small ones are good but I seem to get more error with the larger ones.  

73, Scott WA9WFA
On Apr 6, 2014, at 6:52 PM, Walt Hutchens <waltah at earthlink.net> wrote:


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