... 1.Spherical Bearing UC/NA Series--UE204-212, --SUE204-212, --UER204-212,--SUER204-212 .2.Special features1) Material for chrome ... shafting costs versus turned, ground and polished shafting. UE SERIES INSERT BEARINGS ARE INTERCHANGEABLE WITH SETSCREW AND ECCENTRIC ... COLLAR TYPE INSERTS. BEARING TYPELOCKING BYDISADVANTAGE COMPARED TO UE TYPEUCSETSCREW DAMAGE TO SHAFT,UN-UNIFORM LOCKING,NOT SUITABLE ...