Precision Model Bearings is a manufacturer of miniature precision ball bearings, extra thin type bearings, flanged bearings and stainless bearings in sizes ranging from a 0.6mm Bore diameter to 90mm and O.D sizes from 2.5mm to 100mm. Sapporo Precision Bearings' standard material for races and balls is a vacuum degassed high carbon chromium steel allowing for high efficiency, low torque, low noise level and long bearing life.