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Old 09-18-2012, 09:03 PM   #1
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Useful blade angle trick

Here is a way to get the correct angle when sharpening a knife.

Measure the width of the blade at the handle end. Do this in millimeters, if possible (makes the math easier).

For 20 degrees, divide by 3
For 15 degrees, divide by 4.

That is the height you should hold the back edge, at the handle end, above the stone to get the desired angle.

A new, unshuffled , deck of Bicycle playing cards has 3.5. cards per millimeter. Do the math and count out the number of cards to get the height.

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Old 09-19-2012, 12:30 AM   #2
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Old 09-19-2012, 07:23 AM   #3
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As a rule of thumb for a 25mm wide blade, I try to keep the spine 7mm above the stone; using a proportionately lower / higher height for narrower / wider blades.
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