I did it by eye. I made it from the outer ring of a bearing (which is why my blade is 5 mm thick). I cut it in half, heated up one half, and forged it into a straight flat bar. Then I cut out the shape using an angle grinder (the teeth on the spine of the blade and fitted the shape for the handle) and sharpened the blade on a bench grinder. I made the holes in the blade using a drill press.

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[–] 1 point 3 days ago (2 children)

That's awesome! I don't understand the measurement scale pictured, though. How many bananas is that?

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