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What a CNC operator does
A CNC operator loads programs, fits tooling and materials, and runs computer-controlled machine tools that cut, drill, mill or turn components to a precise specification. The role turns a digital program and raw stock into finished, measured parts.
It is a precision-focused production role. Day to day it blends machine setup, close monitoring of the cut, dimensional checking and small adjustments, all carried out within standard procedures and machine-safety rules.
Core responsibilities
- Setting up the machine: loading programs, fitting tools and securing the workpiece.
- Running the machine and watching the cut for tool wear, vibration or faults.
- Measuring finished parts against drawings using gauges and instruments.
- Making minor offset or speed adjustments to hold tolerances.
- Recording output, scrap and any deviations from specification.
- Carrying out routine cleaning and first-line machine care.
- Following standard operating procedures and machine-safety rules.
Skills and qualities
- Ability to read engineering drawings and basic CNC programs.
- Precision and consistent attention to tolerances and finish.
- Comfort with measuring tools such as callipers and micrometers.
- Mechanical aptitude and care when handling tooling.
- Concentration and steady focus across a full shift.
- Methodical problem-solving for stoppages and quality issues.
- Strong machine-safety awareness.
Typical employers and settings
- Precision-engineering and machining workshops.
- Automotive, aerospace and component manufacturers.
- Tool, die and mould-making businesses.
- Metal and plastics fabrication firms.
- Subcontract production facilities.
How the role is recruited
- Roles are filled directly or through staffing and recruitment agencies, sometimes with on-the-job training.
- Screening looks at machining experience, drawing literacy, shift availability and right to work.
- Interviews are practical and may include a setup or measuring exercise.
- Some employers offer machine-specific or controller-specific training during onboarding.
- Onboarding covers the specific machines, controllers, tolerances and safety rules.
Documents involved
- A job description listing machine types, controllers and tolerances required.
- An employment contract or agency assignment terms.
- An offer letter confirming role, shift pattern and start date.
- Right-to-work and identity checks as required in the jurisdiction.
- A training and safety-induction record.
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