4 Bolt Flange Bearing, Back Side to Center Width 0.859 in, Bearing Insert Material Alloy Steel, Bearing Insert Type Radial Ball, Bore Diameter 1 11/16 in, Bore Type Cylindrical, Closure Double Sealed, Housing Material Cast Iron, Housing Type Square, Included Bearing UCX09-27, Lubricant Material NLGI #2 Equivalent, Maximum Speed 3,550 RPM, Maximum Temperature 220 Degrees F, Minimum Temperature -20 Degrees F, Mount Hole Center-to-Center Height 4.375 in, Number of Mount Holes 4