Palmgren 82069 8 inch 3/4HP 115/230V grinder buffer Each unit is equipped with a strong, powerful motor that supplies the necessary torque for start-up and operation under load Dynamically balanced rotors and sealed bearings minimize vibration and ensure smooth running OSHA compliant wheel guard for all grinding wheel and wire brush operations Steel seated ball bearings support the motor shaft for exceptionally long wear. Large diameter armature shaft with shielded bearings for smooth operation