Not off hand but it should be relatively easy to figure it out just by looking at the old ones. Bearings typically have their number stamped on the edge of the race. Failing that, measure the old ones and use those dimensions to source new ones. Iirc the pcnc1100's spindle was somewhat limited in terms of rpm so any off the shelf bearing will probably suffice but you could also get tight tolerance (C3?) bearings if you wanted to spend some extra dough on better parts. Just be aware that they are much more sensitive to lubrication and contamination and can generate a lot of heat if not properly cared for.
Ok, thanks. I crashed the machine while using the superfly and it broke the pin inside the spindle that goes in the slot on the r8 collet. I was thinking I would replace the bearings while I was in there.
Looks like they can be had fairly cheap all the way up to not so cheap. The 1100 isn't particularly high performance, I'd bet the cheaper bearings would do the job.
I've bought bearings from VXB for many years (for design project use, not actual mills) and always been happy.
Only weird thing is they show up on the credit card bill as some other company name -- something like "Nation Skander" I think?
Replacement spindle bearings
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