Hi Steve,
GET A VISE !!!
Drill bits have a tendency to grab the metal as they break through.
If you are holding the piece that you are drilling when it grabs, you will get
hurt.
If it has sharp edges your hands will get cut.
(softer metal grab more often (brass,copper,plastic))
A sharp bit with a High Heilix (point) grabs easily, a dull bit doesn't grab as
much on these.
You can buy specialty bits for some applications that have different angled
points
(Regular or High Helix)
Regarding Drill bits,
I have been trying to find out for years how to tell good drill bits.
The only answer I have gotten is to use a well known "High Speed Drill" brand.
Regarding sharpening drill bits,
Machinists have told me that it is an art. Some people can do it, some can't.
There is a section in the "Machinery's Handbook" called Cutting speeds and feeds
MACHINERY'S HANDBOOK By McCauley, Oberg, Jones, Horton, Ryffel, Heald and
Hussain
CD-ROM (Only) ISBN: 0-8311-2666-3 $ 89.95
CD-ROM & "Toolbox-sized" Handbook, 5x7 ISBN: 0-8311-2620-5 $149.95
I have seen this on the web, but haven't checked it out yet.
SHOPTASK LIBRARY
VOLUME 12 DRILLS, TAPS AND DIES $19.95
http://www.shoptask.com/tools.htm (800) 343-5775
You might want to check out catalogs just to see whats available
example :
Sizes: Fractional sizes / Letter Sizes / Number sizes / Metric
Lengths: Jobber lengths /
Material: steel / cobalt/ carbide /
Shank size:
Centering or Spotting Drills
Hope this helps, Brian.
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