4 Bolt Flange Bearing Back Side to Center Width 0.709 in Bearing Insert Material Alloy Steel Bearing Insert Type Radial Ball Bore Diameter 1 1/8 in Bore Type Cylindrical Center Height 2.125 in Closure Single Sealed Expansion Type Fixed For Environment Highly Dusty and Dirty Housing Material Cast Iron Housing Type Square Included Bearing WJB UC206-18 Insert Bearing Lubricant Material Chevron SRI 2 NLGI #2 Equivalent Maximum Speed 5 500 RPM Grease Maximum Temperature 200 Degrees F