Idler? Could someone show me a link where it use and where I can find it? Is U608 Bearing idler? Thanks.
Idler bearings differ from printer to printer. Do your research, all the information you need is available on the internet.
Yes, 608 bearings a used as idlers in many reprap designs.
U608 bearing seems for Rail. What’s for belt?
@Derek_Meng the 608 bearing, without the U, is the one you’re looking for.