Read drawings before picking a wheel
For setup work, you read the drawing's required size and smoothness, then pick a grinding wheel to match.
Career profile
Metal and Plastic Grinding and Polishing Machine Operator
Grinding and polishing machine operators grind parts to exact size or polish their surfaces.
You bring a rough surface to a planned, controlled smoothness, then make sure the part still measures within its specified size.
A day in the life
Secure the next workpiece
Set the next workpiece in position and lock it in place with clamps or the machine's chuck.
Catch problems mid-grind
Stay by the running grinder, and if it acts up, pin down why and adjust its controls.
Measure size and smoothness
Measure the piece with a micrometer or gauge against the drawing's tolerance range, and check its smoothness.
Quick facts
High school + workplace training
United States · 2025
$22.38/hour
United States · May 2025
10.8% employment decline
United States · 2025–2035
Quick orientation
Preparation, pay & outlook
Preparation
High school + workplace trainingA high school diploma or equivalent is the typical starting point; you learn the machines on the job.
Pay
$22.38/hourThe national median is $46,550 a year.
Outlook
10.8% employment declineAbout 4,500 openings a year are projected despite falling employment.
Fit, tradeoffs & changing tools
You might like this if…
- You enjoy making small adjustments until a measurement is right.
- You can keep checking carefully during repeated work.
- You like figuring out why a machine’s results changed.
Things to weigh
- Standing, repeated hand movements and machine noise can make a shift tiring.
- Some factories run evenings and weekends, so the schedule may reach beyond a school-style weekday.
Where AI may help
Some cylindrical grinding systems use robots to load parts and automatic gauges to measure them, reducing repeated handling.
What people still lead
Operators still choose setups, investigate bad results and check whether the finished surface meets the drawing.
What we can’t predict yet
How much loading and checking will remain hands-on depends on the machines a shop installs and the parts it makes.
Pay in context
Earnings
Use the national median as a reference when comparing actual offers.
The middle of the pay distribution
The May 2025 median was $46,550 a year, or $22.38 an hour. Half earned more and half less; this is not a starting rate.
Openings alongside declining employment
Employment is projected to fall 10.8% from 2025 to 2035, with about 4,500 openings annually on average. Openings are not the same as newly created jobs.
The range around the median
In 2025, the lowest-paid 10% earned $36,110 a year or less, and the highest-paid 10% earned $62,600 or more. These are wage thresholds, not beginner and experienced pay rates.
Pay differs across factory settings
An older national comparison shows average hourly pay of $20.45 in foundries and $22.19 in metalworking machinery manufacturing for this occupation in May 2023. Treat these as historical industry averages, not current offers.
Getting started
Learn in a trainee job
- What the route involves
- Watch an experienced operator, then practice basic machine operation and part handling under supervision.
- What it can lead to
- Build toward running the machine, measuring finished parts and making routine adjustments.
Study machining before applying
- What the route involves
- Take a machining course or certificate with hands-on surface grinding, drawing reading and precision measurement.
- What it can lead to
- Gain basic machine-shop skills to bring to entry-level manufacturing applications.
- What to check
- School preparation still leads into training on the employer’s equipment.
A high school diploma or equivalent is typical. You can seek trainee employment or build machining skills in a school shop first.
After entry
Career paths
This starts where the entry routes leave off: early work, growing capability, and advancement or specialization.
Get consistent on one machine
Build a reliable rhythm of running parts and checking the results.
Handle more of the setup
Learn to select fixtures, set feeds and speeds, and troubleshoot a grinder’s loading system.
Move into setup or precision grinding
Work toward setup responsibility or specialize in demanding surface and cylindrical grinding, where wheel choice and dimensional control become central.
Where you can work
Aerospace fastener production
You may grind batches of parts, troubleshoot automatic loading and record piece counts and run times. Keeping production consistent matters throughout the lot.
- Indoors
- Safety-sensitive
Small precision job shops
Short runs of tooling and components can put more emphasis on choosing wheels and setting up each job. Some shops pair this work with a small team and a climate-controlled floor.
- Indoors
- Safety-sensitive
Try it
See whether the job clicks before you commit to the path.
Watch a surface-grinding demonstration from a machine maker or technical college. Sketch how the part is held, where material comes off and how the result is checked. Notice whether the repeated measuring interests you as much as the machine.
Stay safe: Keep this exercise observational; operating a grinder requires hands-on instruction.
Sources
- O*NET OnLine. 51-4033.00 — Grinding, Lapping, Polishing, and Buffing Machine Tool Setters, Operators, and Tenders, Metal and Plastic. Accessed 2026-10-03.
- U.S. Bureau of Labor Statistics. Occupational projections and worker characteristics, 2025–35. Accessed 2026-10-03.
- U.S. Bureau of Labor Statistics. Metal and Plastic Machine Workers. Accessed 2026-10-03.
- Southeastern Community College. Precision Machining Certificates. Accessed 2026-10-03.
- Avantus Aerospace. Centerless Grinder. Accessed 2026-10-03.
- Pinewood Tool. Senior Precision Grinder. Accessed 2026-10-03.
- UNITED GRINDING North America. Boost Throughput of Your Quality Parts with Automated Machine Tending. Accessed 2026-10-03.
- O*NET OnLine. Oregon Wages: 51-4033.00 — United States wage comparison, 2025. Accessed 2026-10-03.
- U.S. Bureau of Labor Statistics. Occupational Employment and Wages, May 2023 — 51-4033. Accessed 2026-10-03.