There were two different bearings on the worm shaft when I disassembled it. One end had a Link-Belt Cup 23700 and Link-Belt Cone 23704 which I'm guessing is probably the same as the Shafer bearing. This Link-Belt bearing is a tapered spherical roller bearing. The other end had a Timken cup 15523 and Timken Cone 15578. This Timken bearing is a straight tapered roller bearing. According to the parts manual both bearings should be the same. That's why I wanted to know what the AC numbers cross-referenced to, so I could figure out which one is the correct bearing. Like the Shafer bearing, the Link-Belt bearing is no longer available, so it may not matter which bearing is correct since it probably isn't available any more.
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