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Spade Drill Bit |
Spade drill bit
The absolute best source for sharpening this tool is Leonard Lee's book, The Complete Guide to Sharpening, Chapter 15. (This is a must-have for any sharpener's library.)
Ensure both shoulders are the same height. A jig is highly recommended (a good example is shown on Nick Engler's web site, including instructions for making one).
DO NOT change the center point of the drill bit, or the diameter of the drill bit. And, grind the minimum off the bit.
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Removing wood doesn't show your skill, adding wood does. Unknown |
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General Guidelines |
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Point Angle |
Rake Angle |
Notes |
| 40° | 0° - 10° | |
Probably best to stay with the drill bit's geometry as supplied by the manufacturer.
