A professional who operates one or more previously set up single-spindle screw machines (type of lathe) equipped with automatic indexing and feeding mechanisms to perform series of machining operations on metal bar stock, following specifications. Respnsibilities include:

• Reads blueprint and job order for such information as dimensions, tolerances, and number of workpieces to be machined.
• Examines machine to become familiar with tooling setup.
• Loads stock into feeding mechanism manually or with hoist.
• Starts machine and observes operation.
• Verifies conformance of sample workpieces to specifications, using preset gauges, micrometers, or dial indicators.
• Adjusts machine controls and changes tool settings to keep dimensions within specified tolerances.
• Replaces worn tools.
• May operate bench grinder or cutter-grinding machine to sharpen tools.
• May machine plastics or other nonmetallic materials.
• May be required to have experience with particular material or product or machine of particular size, type, or trade name.
• Differs from screw-machine operator, production in that this work is characterized by variety, with shorter runs and less repetition.