4 Bolt Flange Bearing Back Side to Center Width 1.142 in Bearing Insert Material Alloy Steel Bearing Insert Type Radial Ball Bore Diameter 2 7/16 in Bore Type Cylindrical Center Height 3 7/16 in Closure Single Sealed Expansion Type Fixed For Environment Highly Dusty and Dirty Housing Material Cast Iron Housing Type Square Included Bearing WJB UC212-39 Insert Bearing Lubricant Material Chevron SRI 2 NLGI #2 Equivalent Maximum Speed 3 000 RPM Grease