I have this model.



I have found the lower guide bearings fill up with very fine sawdust pretty quickly and seize up.

As for blades, I have mine made at a local saw shop, as good as a wood slicer and about $8 each if I buy 10 at a time. They only break after months of heavy use and after they are completely worn out.

Bob,
I double checked the the new ones are coming with a 608ZZ double shielded guide bearing and a 6000ZZ double shielded thrust bearing, neiter are a sealed bearing.  I use a bearing lube that is available at most woodworking stores for lubing router bit bearings.  Fine dust does seem to penetrate those bearing.  Sealed bearings do make alot more sense given the application. dino

I talked to Grizzly and the guide bearings can be cross matched with other bearing companies they told me. They said just write down the number on the bearings and other bearing companies can  match them. Dean