As I have mentioned here before, my father passed away in 1998. When we sorted his things, I got a lot of tools and parts of various sorts. He was somewhat of a hoarder although in his later years he had a regrettable tendency to purchase Taiwanese bargain bin tools instead of the good stuff.
Last night when I was going through some boxes, I found a Craftsman 572.610010 rotary tool. It looks like new. He probably never used it. When I turned it on, it ran for a few seconds, and then the chuck stopped turning. The motor continues to run just fine. The chuck is free-wheeling.
When I opened it, I found that there is a plastic or nylon sleeve that couples the motor shaft to the chuck. It was completely disintegrated from age. The problem now is that I cannot find a parts list or even a comparable parts lists that shows the part. If I can't find the part number, there is no chance of finding the part. It's probably not available anyway, but it's worth looking.
It looks like the trash can for this one.
I know that tools don't last forever, and I know that manufacturers cannot be expected to supply parts forever, but what aggravates me is that the Sears parts site does not even list the model.