SNASOPA208-40MM Standard Duty Stainless Steel Stand-Off Series Eccentric Locking Tapped Base Pillow Block Bearing 11/16" ID the CUCSTRS has a Hard

the CUCSTRS has a Hard Chrome bearing insert and a Stainless Steel housing

Note: This is the spec sheet for the version with cast iron housing and mild steel bearing insert

Porous flanged bronze bearing is press-fit in sturdy zinc die cast sphere with felt strip for lubrication

the SNASFB has an eccentric locking bearing insert

SNASOPA208-40MM Standard Duty Stainless Steel Stand-Off Series Eccentric Locking Tapped Base Pillow Block Bearing 11/16" ID the CUCSTRS has a HardClick here for spec sheets: Stand Off Catalog Note: SNA bearings not in catalog, dimensions are the same (except "z" is longer, see SNA vs SUC pages for bearing insert dimensions), just has eccentric locking insert instead of set screw.