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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 |
Sharp
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Notes |
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| 40° | 0° - 10° |
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Probably best to stay with the drill bit's geometry as supplied by the manufacturer.
Example icon
Sharpness scales (as shown in the grey icon to the left) are used to indicate the recommended sharpness for the blades noted above. You can click on any of the icons showing the sharpness scale and be redirected to the page describing this more. Lower numbers are duller; higher numbers sharper.
These are general recommendations; you will need to use your own judgment, based on the knive’s intended purpose.
