Review on High-Performance Bearing Bearings: 626ZZ 626Z 80026 for Optimal Efficiency by Nathan Jones

They were purchased to replace my Wen band saw. They hold up well on the top rail but fail fairly quickly on the bottom rail. I attribute this to sawdust penetrating the shields covering the orbs. I recommend using sealed bearings for the lower bandsaw guides and these for the upper ones. A trick to lubricate them better is to soak them in a container of oil before use. The oil seeps into the balls.