The NTN 51312 is a standard size thrust ball bearings with ISO dimensions 60×110×35 mm. Bearings in the 60mm bore range are commonly used in vertical ball screws, large CNC rotary tables, heavy jacks, vertical pump shafts. This is an open type, requires periodic lubrication, suitable for clean environments variant. NTN Japan — Japanese technology, consistent quality, strong in automotive and machine tool bearings — 4 equivalent brands available under ISO designation 51312.