Pillow Block Bearing Base Height 2.5 in Base Width 3.56 in Bearing Insert Material Alloy Steel Bearing Insert Type Spherical Roller Bore Diameter 4 in Center Height 4.125 in Expansion Type Expansion Housing Material Cast Iron Included Bearing Expansion M2000 Spherical Roller Lubricant Material Lithium Grease Maximum Speed 1 200 RPM Maximum Temperature 250 Degrees F Minimum Temperature -40 Degrees F Mount Hole Center-to-Center Length 10 7/8 in Mount Type Bolt-Through