Our Pillow Block Stands are used where speeds are moderate and loads are medium. These are used in place of the expensive Cast Iron or Malleable Iron Pillow Block units, under the above conditions. The flanges listed below are standard and dimensionally have the same distance between bolt hole centers and base to center line. A Two-Bolt flange is required to retain ball bearing, bolt together (ordered separately). All Pillow Block Stands are finished with clear zinc plating.