2 Bolt Flange Bearing Back Side to Center Width 0.515 in Bearing Insert Material Alloy Steel Bearing Insert Type Radial Ball Bore Diameter 1/2 in Bore Type Cylindrical Center Height 1 1/16 in Closure Single Sealed Expansion Type Fixed For Environment Highly Dusty and Dirty Housing Material Cast Iron Housing Type Rhombus Included Bearing WJB SB201-8G Insert Bearing Lubricant Material Chevron SRI 2 NLGI #2 Equivalent Maximum Speed 7 300 RPM Grease Maximum Temperature 200 Degrees F