A professional who operates machines, such as lathe and drill press, to machine centrifugal switch assemblies for electric motors, performing any combination of following duties. Respnsibilities include:

• Positions switch bore and hub cylinder in fixture on hydraulic press.
• Starts press to lower ram and force hub into switch bore.
• Clamps assembly to bed of drill press and starts press to ream bore of hub cylinder to specified size.
• Verifies diameter of bore, using plug gauge.
• Mounts switch assembly to lathe and inserts specified cutting tool in tool holder.
• Sets cutting tool to specified depth of cut, using micrometer.
• Starts lathe to cut outside diameter of switch, to cut slot in contact surface, or to remove rivet heads and burs.
• Verifies diameter of switch or depth of slot, using micrometer or plug gauge.
• Mounts switch to test motor.
• Starts motor and turns control spring setscrew, observing tachometer, until switch opens at specified revolutions per minute.
• Inserts mandrel in bore of switch assembly and mounts assembly in test stand.
• Rotates mandrel and observes assembly for static balance.
• Drills metal from rivet heads or solders additional metal onto heads to balance switch assemblies.
• Mounts assembly to lathe and adjusts dial indicator to specified setting.
• Starts lathe and observes dial indicator to test balance of assembly.