Pillow Block Bearing Base Height 2.25 in Base Width 4.5 in Bearing Insert Material Alloy Steel Bearing Insert Type Tapered Roller Bore Diameter 3 1/2 in Bore Type Cylindrical Center Height 3.75 in Expansion Type Expansion Housing Material Cast Iron Included Bearing Timken Type E Tapered Roller Lubricant Material Lithium Complex Grease Maximum Speed 1 640 RPM Maximum Temperature 250 Degrees F Minimum Temperature -40 Degrees F Mount Hole Center-to-Center Length 11 in