Pillow Block Bearing Base Height 2.25 in Base Width 4.06 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 Fixed Housing Material Ductile Iron Included Bearing Non-Expansion 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