These rugged self-aligning Pillow Blocks were designed for applications where heavy loads and higher speeds are encountered. These units are self-aligning due to the spherical construction of the inner housing which conforms to a spherical socket formed in the outer housing. The base is sprung slightly when the bolts are tightened which insures proper pressure between inner and outer housing so as to permit free self-alignment and yet maintain the inner housing in correct position. The outer housing or top strap is made from 10 gauge steel and the base from 12 gauge. They can be installed either in horizontal or vertical position. Standard units are supplied with threaded grease fittings and the units have large grease reservoirs. Finished with clear zinc plating for corrosion resistance.