4 Bolt Flange Bearing Back Side to Center Width 0.984 in Bearing Insert Material Alloy Steel Bearing Insert Type Radial Ball Bore Diameter 2 3/16 in Bore Type Cylindrical Center Height 3 3/16 in Closure Single Sealed Expansion Type Fixed For Environment Highly Dusty and Dirty Housing Material Cast Iron Housing Type Square Included Bearing WJB UC211-35 Insert Bearing Lubricant Material Chevron SRI 2 NLGI #2 Equivalent Maximum Speed 3 300 RPM Grease