Pillow Block Bearing Base Height 3 in Base Width 5.38 in Bearing Insert Material Alloy Steel Bearing Insert Type Spherical Roller Bore Diameter 4 15/16 in Center Height 5.5 in Expansion Type Expansion Housing Material Cast Iron Included Bearing Expansion M2000 Spherical Roller Lubricant Material Lithium Grease Maximum Speed 900 RPM Maximum Temperature 250 Degrees F Minimum Temperature -40 Degrees F Mount Hole Center-to-Center Length 15.5 in