Custom Plastic Machining

Our machining department started as an aid to support our fabrication​​​​​​​. Over the years, customers have come to rely on Chicago Plastic Systems to supply custom CNC machined components.

Whether you need a simple bushing or a complex 5 axis machined semiconductor​​​​​​​ component, contact us for all your machined plastic rfq's. 

Todays high tech plastics have many advantages over their metal counterparts.  Some of these are lower weight, significantly better corrosion resistance, lower coefficient of friction, better wear rates and easier to machine.  We're experts in material selection and welcome the opportunity to discuss your application.

  • Starwheels​​​​​​​
  • ​​​​​​​Conveyor ​​​​​​
  • Rollers
  • Pump internals
  • Flanges
  • Filter screens​​​​​​​
  • Guide rails​​​​​​​
  • Special fittings
  • Pipe
  • Parts trays
  • Carrier pallets
  • Valve components

Our Projects

These natural Nylon thrust washers can support a high load and still allow mating parts to move freely.  Nylon has an ecellent value for its performance.  We can supply parts like these in quantities into the tens of thousands.

Pictured above is a polypropylene fitting for use in a pharmaceutical application.  After machining, the part is welded into an assembly and then machined again to remove excess welding rod.


Tiny rollers used in a food application had to withstand repeated heating and cooling to extreme temperatures.  We helped the customer select Ultem since it excels in thsoe conditions and is FDA compliant.


The natural UHMW-PE conveyor rail pictured above had to be "3-D" machined because of the steep sides.  Approximately 2" thick and 5" wide, we supplied these to the customer in 10 foot lengths.


Materials We Machine

  • Acetal
  • Nylon
  • PVC
  • CPVC
  • Polypro
  • PTFE
  • Hydex
  • HDPE
  • PEEK
  • Ertalyte
  • Ultem
  • Flourosint
  • Noryl
  • Torlon
  • Nylatron
  • Delrin
  • PVDF
  • UHMW
  • Vespel
  • Teflon
  • PPS (polyphenylene sulfide
  • PEI (polyetherimide)
  • PAI (polyarylimide)
  • PPO (polyphenylene oxide)
  • Polysulfone

Pictured at left is a tight tolerance machining glass filled PTFE carrier tray.  It is used to carry glass slides in a piece of medical lab equipment.

Here's another automated equipment component.  This rail is part of the mechanism on a machine to check-weigh food products before being packaged.  It is made from natural Acetal.

This acetal or Delrin ring segment fits together with 3 others to form a complete circle.  It functions as a seal on an automated packaging machine.  The inset shows the profile of the piece which was created by 3-D machining to a surface finish of 16 RMS.  Contact us today to learn more about how we can provide machined plastic parts for your application.​​​​​​​

We have two of the largest CNC routers in the area which allows us to make parts like this 5' diameter CPVC valve component.  Overall we're capable of routing parts 60" x 144" in a single pass and we have 4th axis indexing for machining pipe or parts up to 8" in diameter.

The natural polypropylene door guide rails pictured above were welded onto a chemical resistant enclosure to create sliding doors.  Many of the products we make are built with parts that we machine before welding into an assembly.