[TowerTalk] Tool question

[Dubovsky, George]

Pete,

Depending on how much damage there is, you might be able to fix it. It's
a "single-flute" cutter, so there is only one cutting edge. If you just
rounded off the leading edge of the cutter, you can grind the (vertical)
edge back a little, taking care to maintain the cutting edge geometry -
I'm guessing, just looking at one here, that it's 90 degrees (zero
rake). A small grinding wheel on edge might do it, or a *real* steady
hand with a dremel. To do it right, you will need to blend the adjacent
"good" steps into the ones you are trying to repair. Even if you totally
wreck it, you're only out the $35 ;-)

73,

geo - n4ua 

-----Original Message-----
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com] On Behalf Of Pete Smith
Sent: Thursday, September 03, 2009 9:09 AM
To: TowerTalk
Subject: [TowerTalk] Tool question

Yesterday I was working on a grounding bar for my feedlines, involving a

piece of plated angle stock with pre-made holes.  Silly me, I figured 
that I could use a Unibit to enlarge the holes to fit barrel connectors,

particularly if I added a little cutting oil for cooling and went slow.

Silly me, my $35 Unibit now has at least two steps that are dead.  I 
figure there are some pretty smart fabricators on here, and hope someone

can advise on whether or how a Unibit can be resharpened.

-- 
73, Pete N4ZR
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