4 Bolt Flange Bearing, Back Side to Center Width 0.591 in, Bearing Insert Material Alloy Steel, Bearing Insert Type Radial Ball, Bore Diameter 3/4 in, Bore Type Cylindrical, Center Height 1 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 UC204-12 Insert Bearing, Lubricant Material Chevron SRI 2, NLGI #2 Equivalent, Maximum Speed 7,300 RPM Grease, Maximum Temperature 200 Degrees F