Earlier quoted context omitted.
> Metal, vs plastic gears. Sintered metal gears, last only a little longer than plastic and then fail catastrophically destroying half of the device so that you can't repair it. But at least they are much cheaper than proper machined gears.
My KitchenAid mixer ate a gear many years ago. They would lead you to believe they are a high quality brand, no? After disassembly, it turned out to be perhaps the only plastic gear in the thing. It occurred to me that it was perhaps designed to fail rather than the mixer continuing to break the bones of the person who got their hand caught in the paddle. So, I throw the engineer a bone for that one. I was bummed tho…
I bought an official replacement from KitchenAid for $12 including shipping.