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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).
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Removing wood doesn't show your skill, adding wood does. Unknown |
Grind the minimum off the bit.
DO NOT change the center point of the drill bit, or the diameter of the drill bit.
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General Guidelines |
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Point Angle |
Rake Angle |
Notes |
| 40° | 0° - 10° |
click on the gray block to see more |
Probably best to stay with the drill bit's geometry as supplied by the manufacturer.
