Asymmetrical bevel, can I use the Sharpmaker?

Joined
Jan 12, 2005
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239
Hi,

I have 2 Japanese kitchen knives with asymmetrical bevel. Can I use my sharpmaker to sharpen them? If I can, how do I do it?
The knives are Misono, they are 70 / 30.


Thanks.
 
Yes.

Assumming the edge angle is 30* inclusive (which is a common factory angle for this knife line). If the asymmetry is 66.67/33.33, thereof the left side is 20* and the right side is 10*. Save the trouble, simplifying 70/30 as 67/33 = left 20* & right 10*. Or do this math for whatever inclusive angle you want.

Sharpmaker - put rod in for 40* inclusive. Sharpen the left side with the blade vertical, hence 20*. Tilt the blade half way from vertical to the rod (20/2 = 10*) for the right side.

For more cautious approach, use sharpie to mark the bevel and start left at 17* -> slow increase the angle matches the existing angle. start right at 7* -> ditto. That said, it's easier to remember 20* and 10* than some weird blade tilt to match the factory angle.
 
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