The models online are all very valid, but in the end you always have to throw them away
everything, so I divided the problem, the wear will only act on a part that can be changed.
For the blade I have foreseen two models with different angles 15 and 30 degrees.

The materials used by me are:
ABS: blade
ASA: handle
I have not tested other materials.

The blade has a resolution of 0.16, while the handle has a layer height of 0.2.