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NOC 2016 Version 1.3


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7231 – Machinists and machining and tooling inspectors

Machinists set up and operate a variety of machine tools to cut or grind metal, plastic or other materials to make or modify parts or products with precise dimensions. Machining and tooling inspectors inspect machined parts and tooling in order to maintain quality control standards. They are employed by machinery, equipment, motor vehicle, automotive parts, aircraft and other metal products manufacturing companies and by machine shops.


Example titles

  • Automotive machinist
  • Aviation machinist
  • General machinist
  • Machine shop inspector
  • Machined parts inspector
  • Machining inspector
  • Machinist
  • Machinist apprentice
  • Tooling inspector

Main duties

This group performs 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
    • 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 may be required 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.
  • Progression to supervisory positions is possible with experience.
  • The Red Seal endorsement allows for interprovincial mobility.


Breakdown summary

Broad occupational category
7 – Trades, transport and equipment operators and related occupations
Skill level
B – Occupations usually require college education, specialized training or apprenticeship training.
Major group
72 – Industrial, electrical and construction trades
Minor group
723 – Machining, metal forming, shaping and erecting trades
Associated Career Handbook profiles
7231.1 – Machinists 7231.2 – Machining and tooling inspectors
NOC 2016 Version 1.3
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