CNC machining in Chicago, IL
Upload a STEP file or a drawing and we will get it machined, whether that is one prototype or a repeat batch of two hundred. Chicago has 571 machine shops, and nearly all of them will say yes.
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How OpenSpindle helps with CNC machining in Chicago, IL
OpenSpindle is the manufacturing partner built for hardware companies and startups.
For CNC machining in Chicago, IL, that usually starts before a quote exists. We look at the model and tell you which features are driving the price: the setup you could design out, the tolerance that is tighter than the function needs, the corner radius that does not match a standard end mill. Then we route the job to a shop set up for that part, at that quantity, and stay on it through first article and revisions.
We work with a sourcing network of 260+ independent machine shops, fabricators, and manufacturers, and we source the right capabilities for each project.
But we're more than a marketplace or a matchmaking service. We stay involved in the process.
- Finding the right CNC machining partner
- A shop set up for that part at that quantity, not whoever answered the phone
- Reviewing designs for manufacturability
- Cost drivers caught while changing the model is still free
- Finding ways to reduce production costs
- Process and material substitution, fewer setups, better yield
- Getting CNC machining prototypes and one-off parts made
- Quantity one quoted seriously, not deprioritized behind a production run
- Sourcing hardware and other components
- The rest of the BOM, not only the parts we make
- Managing quotes and supplier communication
- One thread instead of nine, revisions included
- Helping transition successful prototypes into production
- Re-sourced as volume changes, instead of capped by one shop
Who buys precision machining in Chicago, IL
Third-party market data about the Chicago metro. These are counts of entire industries in the area, not a description of the OpenSpindle network.
| Industry | Establishments | Location quotient |
|---|---|---|
| Machine shops | 571 | 1.50 |
| Machinery mfg | 1,204 | 1.68 |
| Computer & electronic product mfg | 732 | 1.35 |
| Architectural, engineering & related | 3,135 | 0.87 |
What Chicago builds
Chicago is the most broadly industrial metro in the country, and the interesting part is that nothing stands out. Seven sectors over-index at once: specialized design services at 1.71 across 1,708 establishments, machinery at 1.68 across 1,204, fabricated metal at 1.61 across 2,030, machine shops at 1.50 across 571, electrical equipment at 1.40, computer and electronic product at 1.35, and miscellaneous manufacturing at 1.31 across 1,023.
That plateau is what a century as the country’s freight and machinery crossroads produced. The metro built the equipment that other places used, and the supply base still reflects it: industrial machinery, fabricated metal, and a machine shop population sized to serve both rather than any single end market.
Medical devices give the metro its heaviest concentration of regulated work. Abbott runs its headquarters campus at Abbott Park and announced a $500 million Illinois manufacturing expansion in 2025. Baxter is headquartered in Deerfield. Together they anchor a supplier network that has to hold documented processes and material traceability as a matter of routine.
The newer layer is hardtech. mHUB, the largest independent hardware innovation center in the city, runs eleven prototyping labs and an ecosystem of more than a thousand hardware innovators, and it produces a steady flow of teams who need real parts in small quantities. Motorola Solutions builds communications and video security hardware from its Chicago headquarters, and Caterpillar keeps heavy equipment engineering in the region.
The practical consequence for sourcing is unusual and worth stating plainly. In most metros the question is whether anyone nearby can make the part. In Chicago the answer is almost always yes, from a lot of shops, which makes that the wrong question. Capability does not narrow the field here. What narrows it is which shop is set up for your quantity, your tolerance and your date, and no directory sorts on that.
Anchor employers in the metro include Abbott Laboratories (Abbott Park), Baxter International (Deerfield), Motorola Solutions (Chicago), Caterpillar (Chicago area), mHUB hardtech innovation center (Chicago).
What Chicago buyers machine
The demand here spreads wider than in any other large metro, which is the defining feature rather than a hedge. Medical device work through Abbott Park, Deerfield and the supplier network around them is the most regulated block: instrument bodies, manifolds and fluid-path components, usually against a documented process with material certs. Industrial machinery is the largest by volume, since a metro with 1,204 machinery establishments consumes a constant stream of shafts, bushings, drive components and replacement parts. Electronics and communications hardware adds machined heat sinks, chassis parts and RF enclosure hardware. And the hardtech ecosystem around mHUB produces a steady flow of first-run parts from teams moving off printed prototypes onto something that has to hold a tolerance.
Why capability is the wrong screening question here
In a metro where seven sectors over-index and 571 machine shops compete, almost every shop can truthfully tell you it machines aluminum to five thousandths. That answer does not narrow anything, and treating it as qualification is how a twenty-piece medical prototype ends up at a shop geared for four-hundred-piece industrial runs, or the reverse. The useful questions are narrower: is this shop set up for your quantity, does it hold your tolerance routinely rather than occasionally, does it carry the documentation your industry expects, and does your date fit its schedule. We screen on those, which is a different exercise from collecting quotes.
Materials this metro orders most
6061 and 7075 aluminum carry general machined hardware and enclosure work. 304 and 316L stainless serve the medical and food equipment base, where cleanability and documented material are routine expectations rather than special requests. 1018 and 4140 steel cover machinery components and anything carrying load. Brass appears on fittings and electrical hardware, and Delrin and PEEK handle the electrically isolating and wear parts that instrument work needs.
CNC Machining options
| Process | Lead time | Tolerance | Notes |
|---|---|---|---|
| 3-axis milling | From 3 business days | +/- 0.005 in (0.13 mm) | The default for prismatic parts, plates, and housings with features on one or two faces. |
| 5-axis milling | From 5 business days | +/- 0.002 in (0.05 mm) | Contoured and undercut geometry, and parts you would otherwise have to fixture three times. |
| CNC turning | From 3 business days | +/- 0.002 in (0.05 mm) | Shafts, bushings, and anything round. Live tooling adds cross-holes and flats in one setup. |
| Swiss machining | From 7 business days | +/- 0.0005 in (0.013 mm) | Small, long, high-precision turned parts in volume: pins, connectors, shafts, and fasteners. |
| EDM and wire EDM | From 7 business days | +/- 0.0002 in (0.005 mm) | Sharp internal corners, thin ribs, and hardened tool steel, where a cutter either cannot reach or cannot survive. |
| Precision grinding | From 5 business days | +/- 0.0001 in (0.003 mm) | The finishing operation for flatness, parallelism, and surface finish a mill cannot hold on its own. |
Lead times are typical shop turnaround and exclude transit.
Shipping and transit
Chicago sits on more freight infrastructure than any other US metro, and it shows in transit times: most of the country is within two ground days, and much of the Midwest is next-day. Inside the metro, same-day and next-day courier runs are routine given the shop density along the I-90 and I-55 corridors. Heavy plate, weldments and machinery components ship LTL freight, and winter weather is a real scheduling factor between December and March.
Spec references
Related processes
CNC Machining material guides
Who we build for in Chicago
Top Illinois metros for CNC machining
| Metro | US rank | Machine shops | Location quotient |
|---|---|---|---|
| Chicago, IL | 2 | 571 | 1.50 |
| Rockford, IL | 35 | 91 | 8.99 |
| Peoria, IL | 112 | 28 | 2.42 |
| Kankakee, IL | 198 | 13 | 4.03 |
| Champaign, IL | 324 | 4 | 0.54 |
| Decatur, IL | 328 | 4 | 1.35 |
| Bloomington, IL | 356 | 2 | 0.39 |
| Springfield, IL | 369 | 2 | 0.25 |
Ranked by machine shop establishments in each metro (NAICS 332710), the closest census measure of where machining capacity sits. Source: BLS QCEW 2025 Q2.
Where Chicago sits nationally
Chicago ranks 2 of 378 US metros on Machine shops (571 establishments). On demand it ranks 3, so local capacity and local demand are roughly in step. We still quote it against the national network, because the right shop for a part is the one set up for it.
We tap our partner network. You get the best-match quote.
Upload your part and we tap our network of partner shops to get you a competitive, all-in quote that is the best match for the job.
Frequently asked questions
How fast can I get a machined part in Chicago?
Simple aluminum parts commonly run three to five business days in the shop, plus transit that is often same-day or next-day inside the metro and one to two days across the Midwest. Chicago freight infrastructure means ground time is rarely the binding constraint. If you have a hard date, say so and we quote against it.
Chicago has hundreds of shops. Why use OpenSpindle?
Because in this metro capability does not narrow the field. Nearly every shop here can do nearly every job, so a list of quotes tells you about price and nothing about fit. We screen on quantity, tolerance, documentation and schedule, then stay on the job through first article and revisions.
Can you support ISO 13485 and documented processes?
Yes, and Illinois asks for it more than most metros because of the medical device concentration around Abbott Park and Deerfield. Put the standard, the material certs and the inspection requirement on the request rather than after the quote, because it changes which shops can bid and it changes the price.
I am an early hardware team in Chicago. Will shops quote small quantities?
Some will and many will not, which is the real problem for teams coming out of an accelerator. A shop running repeat industrial batches has little reason to price a five-piece order attractively. We route small and first-run work to shops that want it rather than shops that tolerate it.
Can you quote from a 2D drawing instead of a model?
Yes. A fully dimensioned drawing is enough. A STEP file alongside it speeds things up, because the model answers geometry and the drawing answers intent: tolerances, finishes and which dimensions are critical.
How much does it cost to hire a machine shop in Chicago?
Quantity is the biggest lever in this metro, more than geometry. With 571 shops competing across every sector, a batch of two hundred prices very differently from a batch of five, because the shop that wants one has no interest in the other. We screen on that rather than collecting quotes that differ only on price.
Around Chicago
We quote CNC machining for the wider Chicago area, including Elk Grove Village, Schaumburg, Naperville, Aurora, Elgin, Joliet, Evanston, Deerfield, Rockford.
More of what we make in Chicago, IL
Ready to start your CNC machining project in Chicago, IL?
From CAD to finished product, we're your manufacturing partner. Upload a CAD file, a drawing, or an early concept, and we will come back with a quote and anything we would change first.