Pillow Block Bearing Base Height 1.31 in Base Width 2.19 in Bearing Insert Material Alloy Steel Bearing Insert Type Spherical Roller Bore Diameter 1 11/16 in Center Height 2.125 in Expansion Type Expansion Housing Material Cast Iron Included Bearing Expansion M2000 Spherical Roller Lubricant Material Lithium Grease Maximum Speed 2 650 RPM Maximum Temperature 250 Degrees F Minimum Temperature -40 Degrees F Mount Hole Center-to-Center Length 5.5 in Mount Type Bolt-Through