Don't buy the funny points if you ever want to use them for enlarging
holes.........
I have had some luck with sharpening my bits on a grinder - most have an
angled slot that works for this. Start with the leading edge of each
cutting fluke and rotate about 45 degrees while slightly increasing
pressure. This will give you the right amount of relief (so the cutting
edge is higher than the material behind it). Be careful not ot heat them to
the point where they discolor.
I've had the same frustration with bits dulling quickly and so far haven't
found any that last.
Anybody found some tough bits?
-Mark
-----Original Message-----
From: Douglas Braun & Nadia Papakonstantinou
[mailto:dougnad@bellatlantic.net]
Sent: Tuesday, October 17, 2000 2:01 PM
To: spitfires@autox.team.net
Subject: Drill Bits
Hello,
I wanted to drill a couple of holes in my Spitfire, but
I realized that all my drill bits are dull.
Can anyone recommend a really good brand/model of drill bits
for drilling metal? (Preferably something carried by
Home Depot, Acr Hardware, etc.)
Of course I know that High-Speed Steel is much better
than carbon steel, but these days you see lots of
flashy stuff like "Titanium", funny-shaped points, etc.
I bet many of these are just gimmicks designed to catch
the eye of the average Home Depot customer.
Doug Braun
'72 Spit
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