... Equipment,Semi-Conductor,Rotary Joints,Manufacturing Equipment,Military Turrets,Slip Ring Assemblies,Robotics,Harmonic Drives all major OEMs.Freerun Bearing ... section ball bearings have been manufactured from aluminum, 300 series stainless steel, 17-4PH and other metals. Some ... special ball materials include CRES 440C, 300 series stainless steel, silicon nitride, and M50 steel.Freerun ...