CNC Milling

CNC milling is one of the most popular CNC machining techniques employed for building prototypes as well as high-volume parts across industries. It is a subtractive process, wherein the metal or plastic block is milled to the desired shape. Princeton Industrial’s CNC milling services are well-known and reliable, we can create parts with complex geometries for prototyping or low to mid-volume production.

At Princeton, we can support 3-, 4-, and 5-axis milling, which enables us to create complex geometries easily. Our CNC machining centers provide accuracy for those parts that cannot be turned. These machines can perform many labor intense operations with extreme accuracy and consistency holding tolerances as close as .0002″. Our multi-axis CNC machining capabilities coupled with our experience allow us to assure on-demand lead times and competitive pricing. We can provide instant quotes and to receive it all you have to do is upload your CAD design and receive DFM feedback. Please contact us today to get instant quote.

CNC Milling Capabilities

The following features of our CNC milling service enables us to meet your requirements efficiently.


.0002″ with a 32 micro-inch finish or better

Typical Annual Volumes

1 piece prototype up to larger lot quantities with scheduled releases depending upon product complexity, application, and use.

Quality Assurance

MIL-I-45208A (Military Specification Inspection System)
JIT – Just in Time

Materials Machined (Various Grades)

Common Metals: Aluminum, Brass, Bronze, Carbon Steel, Cold Rolled Steel, Steel, Stainless Steel
Exotics: Hastelloy, Inconel, Monel, Molybdenum
Plastics: Delrin, Nylon, Plastics, Polyethylene, Teflon

Additional Machining Capabilities

CNC Turning
CNC Grinding
CNC Drilling
CNC Tapping
CNC Multi-Axis Machining
CNC Swiss Machining
Swiss Machining
Conventional Machining
– Turning
– Milling
– Grinding
– Drilling
– Tapping
Automatic Screw Machining

Industries Served

Aerospace, Automotive, Computer Equipment, Construction Equipment, Defense, Electronics, Hydraulic,  Medical Parts, Military, Off Highway Vehicles, Optical, Pneumatics, Recreational and Off Road Vehicles, Telecommunications, and many others…

A Few Popular CNC Milled Parts

As an experienced CNC milling service provider, we regularly work on complex part geometries. Our experts know how to mill the parts to perfection using different materials.

Contact Us

Speak with our technical team to discuss your machining projects.

Toll Free: 847-839-8500

Quick Contact

An Overview of CNC Milling

In this process, the workpiece to be milled is held in a fixture or vice, which is usually mounted on a working table. The CNC milling machine is guided by a G-code that controls the action of milling tools. We use multi-axis CNC milling machines where the spindle, as well as worktable, can move independently on different axes without affecting each other’s work. This assures high accuracy and versatility. The metal parts, thus, created can be surface finished using different options like painting, chromate plating, and anodizing.

Advantages of CNC Milling Services Offered by Princeton Industrial

There are several CNC machining services in the US specializing in CNC milling. We believe Princeton stands out among them owing to the special features of their services. The following factors have contributed to our rise as one of the leading CNC milling services providers in the US.

  • All CNC machining including milling is performed in-house at our well-equipped facility in Illinois.
  • Multi-axis CNC machines coupled with advanced AutoCAD software and a team of skilled operators help us meet all project requirements effortlessly.
  • Our well-maintained CNC milling machines enable quick production as CNC milled parts can be easily milled within minutes. This makes it more effective than additive manufacturing.
  • Our facility is certified to ISO 9001: 2015. This shows our commitment to quality and adherence to best work practices.
  • Our team works in a clean and well-equipped, temperature-controlled facility, and follows all the safety measures, which helps us assure the safety of people and surroundings.
  • We have partnered with some of the trusted suppliers in the industry, which helps us assure the quality of materials. The materials are tested and inspected for quality before machining them.
  • All CNC milled parts that leave our facility are checked for accuracy and perfection at every stage of manufacturing and they undergo multiple inspections before leaving the facility. This helps us assure ahigh level of accuracy.

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