Cactus bearings.

Hopefully replacing these bearing will get my saw working again, although I'm dubious about it being worth the bother. They're common ones, a 6201 and 6203, easily sourced cheaply from China or with difficulty and expensively if shopping personally, margins by bearing suppliers are legendary and would likely be 10x the China price plus would drain half a tank of fuel finding them.
Being able to shop on-line is a blessing.