An old whetstone wheel gizmo.

[Mr. 16 gauge]

I remember seeing one of those on the farm when I was a kid....it was used to sharpen all manner of farm implements: hoes, corn knives, sickles, scythes, axes, & knives. Learned a long time ago that there is nothing more horrible than trying to work with a dull hoe or cutting implement!

[fishdoggydog]

I had one from my aunt years ago and traded it for some 6MM bullets. You can't pedal it fast enough to burn up your blade if you are careful with the pressure. I like a disc sander for doing garden implements.