[Amps] Want to use a knob with a 3/8" opening on a 1/4" shaft.

[Bill Turner]

ORIGINAL MESSAGE:

At 03:03 AM 12/23/2005, W0UN -- John Brosnahan wrote:
<snip>
>finding some 3/8 brass rod and drilling a 1/4 inch hole in it -- plus
>clearance holes
>for the set screws.  Easier on a lathe, but with care a drill press
>will do it.
<snip>



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This brings up a question for you machinists out there.

I once watched a program on the Discovery Channel which showed how 
rifle barrels are made. It said in order to drill a perfectly 
centered hole in a rod, you clamp the drill bit stationary and rotate 
the rod as if it were the drill bit. Done this way, the rod will 
automatically center itself around the drill bit.

Is this true or just an old (machinist's) wives's tale?

73, Bill W6WRT