NOC 7231 – Machinists and machining and tooling inspectors


  • aircraft engine parts machinist
  • aircraft machinist
  • apprentice automotive machinist
  • apprentice machinist
  • auto parts machine shop inspector
  • automotive machinist
  • aviation machinist
  • bench machinist
  • charge hand, machine shop
  • CNC (computer numerical control) machinist
  • computer numerical control (CNC) machinist
  • computer-assisted machinist
  • diesel engine machinist
  • differential gear testing machinist
  • electrical machinist
  • firearms machining inspector
  • firearms model maker machinist
  • gear inspector-machinist
  • gear tester-machinist
  • general machinist
  • inspector, auto parts machine shop
  • inspector, firearms machining
  • inspector, machine shop
  • inspector, machined parts
  • inspector, machining
  • inspector, machining and tooling
  • inspector, propellers – machining
  • inspector, tool and die
  • inspector, tool and gauge
  • inspector, tooling
  • inspector, toolroom
  • journeyman/woman machinist
  • machine shop charge hand
  • machine shop inspector
  • machine shop inspector, auto parts
  • machined parts inspector
  • machining and tooling inspector
  • machining inspector
  • machining inspector, firearms
  • machinist
  • machinist apprentice
  • machinist, aircraft engine parts
  • machinist, automotive
  • machinist, ballistic laboratory
  • machinist, bench
  • machinist, CNC (computer numerical control)
  • machinist, diesel engines
  • machinist, differential gear testing
  • machinist, experimental
  • machinist, maintenance
  • machinist, model maker
  • machinist, motion picture equipment
  • machinist, mouldmaking
  • machinist, moulds and cores
  • machinist, precision
  • machinist, toolroom
  • maintenance machinist
  • master machinist
  • mould and core machinist
  • mouldmaking machinist
  • NC (numerically controlled) machinist
  • precision machinist
  • printing press machinist
  • propeller inspector – machining
  • prototype machinist
  • set-up machinist
  • tool and die inspector
  • tool and gauge inspector
  • tooling inspector
  • toolroom inspector
  • toolroom machinist
  • turbine blade machinist

Job Duties

Machinists perform some or all of the following duties:

  • Read and interpret engineering drawings, blueprints, charts and tables or study sample parts to determine machining operation to be performed, and plan best sequence of operations
  • Compute dimensions and tolerances and measure and lay out work pieces
  • Set up, operate and maintain a variety of machine tools including computer numerically controlled (CNC) tools to perform precision, non-repetitive machining operations such as sawing, turning, milling, boring, planing, drilling, precision grinding and other operations
  • Fit and assemble machined metal parts and subassemblies using hand and power tools
  • Verify dimensions of products for accuracy and conformance to specifications using precision measuring instruments
  • May set up and program machine tools for use by machining tool operators.

Machining and tooling inspectors perform some or all of the following duties:

  • Verify dimensions of machined parts or tooling using micrometers, verniers, callipers, height gauges, optical comparators, co-ordinate measuring machines (CMM) or other specialized measuring instruments
  • Maintain, repair and calibrate precision measuring instruments such as dial indicators, fixed gauges, height gauges and other measuring devices
  • Report deviations from specifications and tolerances to supervisor
  • Complete and maintain inspection reports.

Employment Requirements

  • Completion of secondary school is usually required.
  • Completion of a four-year apprenticeship program or A combination of over four years of work experience and industry courses in machining is usually required to be eligible for trade certification.
  • Trade certification for machinists is available, but voluntary, in all provinces and territories.
  • Trade certification for tool and gauge inspectors is available, but voluntary, in Ontario.
  • Trade certification for machinists (CNC) is available, but voluntary, in New Brunswick, Quebec and Manitoba.
  • Several years of experience as a machinist, tool and die maker or machining tool operator may be required for machining and tooling inspectors.
  • Red Seal endorsement is also available to qualified machinists upon successful completion of the interprovincial Red Seal examination.

Additional Information

  • Familiarity with exotic and composite materials may be required for machinists in aviation and other advanced manufacturing sectors.
  • The Red Seal endorsement allows for interprovincial mobility.
  • Progression to supervisory positions is possible with experience.


  • CAD-CAM programmers (in 2233 Industrial engineering and manufacturing technologists and technicians)
  • Contractors and supervisors, machining, metal forming, shaping and erecting trades and related occupations (7201)
  • Machining tool operators (9417)
  • Tool and die makers (7232)

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