Day in the life
A Day in the Life of a CNC Machinist
What CNC machinists actually do from the start of a shift to the end: the tasks, tools, schedule and realities of the job.
Review the job traveler and setup sheet for an aluminum bracket order. From there, the day usually includes read blueprints, GD&T and setup sheets, set up CNC mills and lathes, including fixtures, tools and offsets, and load programs and run machines. Usually full-time; many shops run multiple shifts, and overtime is common.
Hour by hour: a typical shift
No two days are identical, but this timeline reflects a realistic day for a CNC machinist working full time.
- Review the job traveler and setup sheet for an aluminum bracket order.
- Mount the vise, load tools and set tool length offsets.
- Set the work offset with an edge finder or probe and dry-run the program.
- Run the first part and complete first-article inspection with calipers, micrometers and a height gauge.
- Adjust a wear offset to bring a bore into tolerance and start production.
- Check every tenth part, deburr and record measurements.
- Clean chips, check coolant concentration and prepare the next job.
Where CNC machinists work
Machinists work in machine shops and factories. Shops can be noisy, and work involves standing, lifting parts and working near rotating equipment and metal chips.
Hours and schedule
Usually full-time; many shops run multiple shifts, and overtime is common.
Tasks you’ll do most often
- Read blueprints, GD&T and setup sheets
- Set up CNC mills and lathes, including fixtures, tools and offsets
- Load programs and run machines
- Measure parts with precision instruments and adjust offsets
- Perform first-article and in-process inspections
- Edit G-code or program parts with CAM software
- Maintain machines, coolant and tooling
Tools you’ll use every day
- CNC mills and lathes
- Micrometers, calipers and height gauges
- Edge finders and probes
- CAM software such as Mastercam or Fusion 360
- Cutting tools and tool holders
- Coordinate measuring machines (CMM)
The best and hardest parts of the job
What people like
- Precise, satisfying work making real products
- Paths into programming and engineering roles
- Training through apprenticeships and on the job
- Skills valued in aerospace, medical and defense manufacturing
What’s hard
- Standing and repetitive tasks
- Exposure to noise, coolant and chips
- Pressure to meet tolerances and schedules
- Some shops require nights or weekends
You’ll likely thrive if…
- I enjoy precise, careful work
- I like math and measurements
- I’m comfortable around machines
- I can concentrate for long periods
- I like making physical products
- I’d like to learn programming over time
Not sure? Take the free CNC Machinist fit quiz or the Career Match Quiz.
Staying safe on the job
- Wear safety glasses and keep loose clothing, jewelry and hair away from spindles
- Never reach into a running machine or clear chips by hand
- Keep machine doors and guards closed during operation
- Handle sharp chips and parts with gloves only when the machine is stopped