Overview
A CNC (Computer Numerical Control) Machinist is a highly skilled tradesperson who operates and programs computer-controlled machine tools—such as mills, lathes, grinders, and routers—to produce precision metal, plastic, or composite parts. They are the vital link between technical designs and physical, functional components used in everything from aerospace and medical devices to automobiles and consumer electronics.
Core Responsibilities
The role typically involves a mix of programming, operation, and quality assurance:
* Blueprint & Model Interpretation: Read and interpret complex engineering drawings, CAD models, and Geometric Dimensioning and Tolerancing (GD&T) symbols.
* Programming:
* Write/Modify Code: Create or edit G-code and M-code programs manually (at the machine control) or using CAM (Computer-Aided Manufacturing) software.
* CAM Software: Use software (like Mastercam, Fusion 360, SOLIDWORKS CAM) to generate toolpaths from 3D models.
* Machine Setup:
* Secure workpieces using vises, clamps, or custom fixtures.
* Select and install the appropriate cutting tools, collets, and tool holders.
* Set work offsets, tool length offsets, and establish the machine's reference points.
* Operation & Monitoring:
* Execute the machining cycle, often overseeing multiple machines.
* Monitor for issues like tool wear, chip formation, and unusual sounds.
* Make fine adjustments to speeds, feeds, and tool paths to optimize quality and efficiency.
* Precision Measurement & Quality Control:
* Use precision instruments (micrometers, calipers, height gauges, bore gauges) to verify part dimensions.
* Perform first-article inspections and in-process checks to ensure parts meet exact specifications.
* Maintenance & Troubleshooting:
* Perform basic machine maintenance (lubrication, cleaning).
* Diagnose and resolve problems with the machine, program, tools, or material to minimize downtime.
Key Skills & Attributes
* Technical/Mechanical Aptitude: Strong understanding of mathematics (especially geometry and trigonometry), metallurgy, and machining principles.
* Attention to Detail: A "tenth" inch) can be the difference between a perfect part and scrap. Precision is non-negotiable.
* Problem-Solving & Critical Thinking: Ability to diagnose why a part is out of tolerance or a tool is failing and implement a solution.
* Computer Proficiency: Comfort with machine controls, CAD/CAM software, and sometimes basic manual programming.
* Spatial Reasoning: Ability to visualize a 3D part from 2D drawings and understand how to machine it step-by-step.
* Physical Stamina & Safety Consciousness: Can stand for long periods, handle heavy materials, and always adhere to strict safety protocols.
Work Environment
* Typically work in manufacturing shops, which can range from small job shops to large aerospace or automotive plants.
* Environment can be noisy, with exposure to coolant mist and metal chips. It is essential to wear Personal Protective Equipment (PPE) like safety glasses, ear protection, and steel-toed boots.
* Shifts often include days, nights, or weekends, especially in high-volume production.
Job Types: Full-time, Part-time
Pay: $60,000.00 – $75,000.00 per year
Expected hours: 40 per week
Benefits:
* Employee mentoring program
* Health insurance
* Salary packaging
Work Location: In person