4 Bolt Flange Bearing Back Side to Center Width 1.22 in Bearing Insert Material Alloy Steel Bearing Insert Type Radial Ball Bore Diameter 2 1/8 in Bore Type Cylindrical Closure Double Sealed Housing Material Cast Iron Housing Type Square Included Bearing A-UC211-202D1 Lubricant Material NLGI #3 Equivalent Maximum Speed 2 900 RPM Maximum Temperature 250 Degrees F Minimum Temperature -40 Degrees F Mount Hole Center-to-Center Height 5.125 in Number of Mount Holes 4