4 Bolt Flange Bearing Back Side to Center Width 0.866 in Bearing Insert Material Alloy Steel Bearing Insert Type Radial Ball Bore Diameter 1 11/16 in Bore Type Cylindrical Center Height 2 11/16 in Closure Single Sealed Expansion Type Fixed For Environment Highly Dusty and Dirty Housing Material Cast Iron Housing Type Square Included Bearing WJB UC209-27 Insert Bearing Lubricant Material Chevron SRI 2 NLGI #2 Equivalent Maximum Speed 3 800 RPM Grease