The FAG 51216 is a standard size thrust ball bearings with ISO dimensions 80×115×28 mm. Bearings in the 80mm 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. FAG/Schaeffler Germany — German precision engineering, especially strong in large and heavy-load bearings — 4 equivalent brands available under ISO designation 51216.