There are other ways to protect stuff inside. One is to use a short bit,
I keep a few screw machine bits that are only about 1-1/2" long on hand.
Another more versatile technique is to surround the drill bit with a
sleeve letting only enough stick out to go through the metal. Sleeve can
be brass or steel tubing, or a block of wood with a hole drilled through
it. The nicest technique is to use a Whitney-Jensen hand punch, model No
5 Jr if only 1-3/4" reach is needed and there's no flange or the model
XX if more reach and depth is needed. These were far more price
effective when I bought them than they are now. At least they don't drop
drillings in the radio. You can capture drillings with a pocket of duct
or masking tap under the hole.
73, Jerry, K0CQ
On 9/30/2010 11:34 AM, Rick - NJ0IP / DJ0IP wrote:
CAREFULL !!! Long ago while drilling two holes in the back of my OM6 to
insert a preselector, the bit went through a few windings of a 2,5 mh choke.
This was just a few days before departing for 4U1VIC for a contest. Of
course Ten-Tec got a spare choke to me in 4 days... and I was in Munich,
Germany. CQ Kenwood: (try 4 months).
Lesson learned. I now use a small C-clamp and clamp a thin piece of plywood
to the inside of the chassis before drilling through.
-----Original Message-----
What's wrong with a ham drilling the back panel himself?
-Stuart
K5KVH
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