Sprocket Chopping Knife

My wife wanted a Chopping Knife since forever while she was nagging about something I've scrolled through instructables... Accidentally I said Yes to something.

The idea was to build one out of a old sprocket from my bike. It Took me something about 3h to build it. I was supplied with two coffee from my wife and used only standard tools like a drill and a angle grinder.

I dive something like 5000-6000Km every year with my bike. These are 3100-3700 freedom units. The chain and sprocket are changed ~once a year.

For this projekt I'm using a SRAM x12 set...

... especially the 50 teeth (the biggest). Therefore the rivets needed to be removed. Then the sprocket was mechanically cleaned halved.

For the cutting edge we need to remove the teeth.

To ease the process of having two identical parts I've used some screws to hold everything together. Then I've used my angle grinder to grind on a first edge. With a sharpening stone I've finished the sharpening for now. (I'll try to harden the blade in the future to further increase the sharpness)

As a handle I'm using some V4A steel which i found in my garden... don't ask. To mount the handle to the sprocket the same holes like the rivets before were used.

To make the two blades as stiff as possible I've cut down some brass tube and added some screws. This way I have more then enough structure added and it feal like a solid pice of metal, zero flexing.