2 Bolt Flange Bearing Back Side to Center Width 0.748 in Bearing Insert Material Alloy Steel Bearing Insert Type Radial Ball Bore Diameter 1 7/16 in Bore Type Cylindrical Center Height 1 49/64 in Closure Single Sealed Expansion Type Fixed For Environment Highly Dusty and Dirty Housing Material Cast Iron Housing Type Rhombus Included Bearing WJB SB207-23G Insert Bearing Lubricant Material Chevron SRI 2 NLGI #2 Equivalent Maximum Speed 4 700 RPM Grease