CNC machining · Aluminum & plastics
Hard‑to‑hold parts, machined to tight tolerances.
Romus is a family-owned CNC shop in Roselle, Illinois, with more than 25 years of experience. We mill and turn aluminum and engineering plastics, and we build custom fixtures for each job so difficult parts hold their tolerances from the first piece to the last.
Order quantity, pieces
- Experience
- 25+ years
- Tolerances
- Down to .0005″
- Inspection
- In-house CMM
- Rush jobs
- As fast as 1 day
Customers
Who we've built for.
Aerospace & defense
- NASA
- U.S. Air Force
- Honeybee Robotics
Government
- U.S. Army Corps of Engineers
- Wisconsin DOT
- Minnesota DOT
Universities
- Concordia University
- Marquette University
- Northwestern University
- Purdue University
- University of Illinois
- University of Wisconsin
- Wayne State University
Industry
- Humboldt Mfg. Co.
- Kessler Soils Engineering Products
- Aztec Plastic Co.
CNC machining
The fixture comes first.
Many tight-tolerance problems are really workholding problems. Thin walls flex, plastics creep under clamping pressure, and features on several faces have to come off the same datums. We design and build the fixture around your part, then machine it.
- Processes
- CNC vertical machining
- CNC turning
- Tolerances
Down to .0005″
Verified on our CMM
- Materials
- Aluminum: 6061, 7075, 2024
- Plastics: PEEK, Ultem (PEI), Torlon (PAI), PTFE, Delrin (acetal), nylon, UHMW, polycarbonate, acrylic, ABS, PVC
- Quantities
1 to 10,000 pieces
Prototype, low-volume and production runs
- Lead time
Quoted per job
Rush parts turned around in as little as one day
- Workholding
Custom fixtures
Designed and built in-house for each part
- Finishing
- Anodize, Type II and III
- Engraving and part marking
- Assembly and hardware installation
- Inspection
Coordinate measuring machine (CMM)
In-house
- CAD / CAM
- SolidWorks
- SolidCAM
- Also in-house
Prototype electronics
DipTrace PCB design, SMT placement, reflow and assembly
Custom workholding
Fixtures, nests and multi-part setups made for your part. The part is supported where it is weak and located the same way on every load.
Aluminum and plastics
The materials we specialize in. Aluminum rewards a rigid setup and the right tooling. Plastics need light clamping and control of heat so they stay in tolerance after they come off the machine.
1 to 10,000 pieces
A single prototype gets the same setup thinking as a production lot. When a part moves to production, the fixture built for the prototype can go with it.
Quality & inspection
Measured in‑house on our CMM.
Our coordinate measuring machine checks critical dimensions and geometric tolerances on prototypes and production parts. Tell us what inspection your program requires and we will plan for it from the quote.
- Critical dimensions and GD&T callouts measured on the CMM
- First-piece checks on new setups before the run continues
- Inspection results available with your order
Prototype development
Machined parts, circuit boards and the assembly.
When a project needs more than machined parts, we build the rest in the same shop: prototype electronics, laboratory fixtures and complete test equipment.
SMT and PCB assembly
We design circuit boards in DipTrace and build them in-house with pick-and-place component placement, reflow soldering and PCB assembly. The finished electronics go into the housings we machine.
Laboratory fixtures and test equipment
Test frames, fixtures and instruments for laboratories, from the machined mechanics to the control enclosure and wiring. We write the control and test software in LabVIEW and Xojo.
Recent work
About Romus
A family shop with 25 years behind it.
Romus Incorporated is a small, family-owned shop. For more than 25 years we have machined parts, built fixtures and developed prototypes for customers who need them done right.
You work directly with the people who program the machines, build the fixtures and inspect your parts.
Request for quote
Send us your drawing.
Email a PDF drawing and a 3D model. The details below help us quote accurately the first time.
PDF drawing with tolerances and GD&T
3D model: STEP or SolidWorks
Drawing revision
Alloy and temper, or plastic grade
Quantities to quote, e.g. 5 / 100 / 1,000
Anodize, plating or other finish
Inspection and certification requirements
Date you need parts