Guess what. I made a new diff from acetal, and it works great! I made it with fences on both sides. I miscalculated slightly when I programmed the width of the belt track, so it's just 5 mm when I was going for 6. Doesn't matter as my belt is just 4,5 mm.
It looks messy around the edges in the photo but it's just some flash and dust from the milling. After the photo I turned it around and milled the other side, and then chamfered the edges in my lathe.
Changes I woud make is to reduce the diameter of the fences by 0,5 mm and add a chamfering toolpath so I don't have to do it in the lathe.
The stock pulley actually meshes poorly with the belt as it's 0.5 mm too small in diameter. This one is a better fit.
Last edited by tahustvedt; 12-10-2014 at 10:01 PM.
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