Abstract: A multi-spindle automatic bar machine having a housing, a plurality of spindles, each with a collet at one end, and mounted with a rotating head which is carried by said housing, said rotating head being adapted to index the spindles through a plurality of tooling stations. An improved machine bearing carried by the rotating head comprising a cylinder having a circular inner bearing surface carrying a spindle having a spindle bearing surface. Each cylinder bearing surface is formed with a pair of opposed spiral grooves each separated by a spiral flat. Each spiral groove is adopted to provide a passageway for lubricant through and over the entire machine bearing lubricating the each flat and the entire spindle bearing surface.