SBLF200 Series 2-Bolt Flange Bearing Unit featuring a shorter bolt hole distance as well as two Set Screws on the extended end of the insert, which can be tightened when positioned onto a shaft. This SBLF206-18 Bearing Unit has a combination of a chrome steel SB200 insert set screw ball bearing, and an oval cast iron 2-Bolt flange housing with grease feeding access allowing for re-lubrication of the insert. Our flange bearing units are pre-lubricated with grease ensuring they are ready for use upon arrival.