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Frequently Used Plastic Material for CNC Machining (2)

Blog  /  Frequently Used Plastic Material for CNC Machining (2)

Frequently Used Plastic Material for CNC Machining (2)

Mar 25,2024

Continuing our exploration of thermoplastics in CNC machining, this article will focus on four additional materials: Polycarbonate (PC), Nylon (PA), Polyethylene Terephthalate (PET), and Polyoxymethylene (POM). Each of these materials possesses unique properties and characteristics that make them valuable in various industrial applications. By understanding the strengths and applications of these thermoplastics, you can make informed decisions when selecting materials for CNC machining projects. Let's delve into the world of Polycarbonate, Nylon, Polyethylene Terephthalate, and Polyoxymethylene.

Polycarbonate (PC)

Polycarbonate is well-known for its great machinability, making it simple to work with utilizing CNC milling or turning operations. It can be effectively machined into complicated pieces and complex shapes, making it possible to create precise and unique components.

The remarkable impact resistance of polycarbonate is one of its most notable qualities. It is perfect for uses where safety and durability are essential since it can bear heavy blows without cracking or breaking. Impact-resistant components, protective covers, and safety equipment can all benefit from the usage of CNC-machined polycarbonate parts.

Because of its great heat resistance, polycarbonate can withstand high temperatures without losing its mechanical qualities. Due to its high glass transition temperature—typically approximately 140°C or 284°F—it can be used in applications where heat exposure or hot conditions are involved. Polycarbonate parts that have been CNC machined can be found in electrical enclosures, lighting fixtures, and automobile parts.

Acids, bases, and solvents are only a few of the substances to which polycarbonate has good resistance. Because of this characteristic, it can be used in applications including laboratory equipment, parts for chemical processing, and medical devices where resistance to chemical exposure is necessary. The accurate creation of Polycarbonate components with the necessary chemical resistance is made possible by CNC machining.

Even though polycarbonate is a strong and long-lasting material, it is lightweight. Its weight-sensitive applications, such as those involving automotive and aerospace components, benefit from this feature since it reduces total weight.

In conclusion, polycarbonate is a great material for CNC machining in a variety of industries, including consumer goods, automotive, aerospace, and electronics, because of its machinability, high-affected resistance, heat resistance, and chemical resistance. It is also lightweight.

samole of Polycarbonate (PC) in CNC

Nylon (PA)

Excellent machinability is a well-known attribute of nylon. It may be efficiently CNC machined to produce items with tight tolerances that are accurate and detailed. Because of nylon's reliable and constant machining behavior, high-quality final components may be produced quickly.

Nylon is an excellent material for applications involving sliding or rotating parts because of its remarkable wear resistance. Because of its resistance to wear and friction, it's perfect for mechanical parts like gears, bushings, and bearings.

Because of its low coefficient of friction, nylon offers good self-lubricating qualities. This feature lessens the requirement for extra lubrication in situations where low friction is preferred, including conveyor systems and sliding mechanisms.

Since nylon is impact-resistant, it can absorb energy and sustain hard hits without cracking or deforming. Because of this characteristic, nylon is a dependable material for applications requiring impact resistance, including protective coverings or structural elements.

Nylon is suited for applications requiring exposure to a variety of substances because it demonstrates resistance to numerous solvents, oils, and fuels. Because it is resistant to the effects of oils, solvents, and certain chemicals, it is useful in the chemical processing, oil and gas, and automotive industries.

Taken together, nylon's electrical insulation, impact resistance, chemical resistance, low friction, wear resistance, and machinability make it a preferred material for CNC machining in fields like general engineering, automotive, aerospace, and electronics.

Polyethylene Terephthalate (PET)

PET is well renowned for being easily machined using CNC turning or milling operations. It can be effectively machined into finely detailed pieces, enabling the creation of intricate geometries and unique components.

PET has outstanding dimensional stability, which means that it doesn't change size or shape when the temperature does. Because of this characteristic, PET parts machined by CNC maintain their intended dimensions and tolerances over time, which makes them appropriate for applications requiring exact measurements and dimensional accuracy.

PET has excellent strength and rigidity, making it ideal for applications requiring structural integrity and load-bearing capabilities. PET components with CNC machining can be used in a variety of sectors, where stiffness and strength are essential, such as industrial equipment, automotive, and aerospace.

Because PET is a highly recyclable material, sustainable production techniques must take this into account. PET parts that have been CNC machined can be recycled and utilized to make new PET products, promoting the circular economy.

sample of Polyethylene Terephthalate (PET) in CNC

Polyoxymethylene (POM)

Because of its beneficial properties, polyoxymethylene (POM), generally referred to as acetal or Delrin, is a thermoplastic material that is frequently used in CNC machining.

POM exhibits low friction properties, providing excellent sliding and wear resistance. This makes it well-suited for applications that involve moving parts, such as gears, bearings, bushings, and sliding mechanisms. CNC-machined POM parts can provide smooth operation and reduced wear in these applications.

POM offers exceptional dimensional stability, meaning it maintains its shape and size even with temperature variations. This property ensures that CNC-machined POM parts retain their intended dimensions and tolerances over time, making them suitable for applications that require precise dimensions and dimensional accuracy.

POM has good resistance to many chemicals, including solvents, fuels, and oils. It can withstand exposure to a wide range of chemicals without significant degradation, making it suitable for applications in the automotive, chemical processing, and fluid handling industries. CNC machining allows for the production of POM components with the required chemical resistance.


In summary, a variety of advantageous features are provided by the plastics frequently used in CNC machining, such as polycarbonate (PC), polyamide (PA/Nylon), polyethylene terephthalate (PET), and polyoxymethylene (POM). These polymers are very machinable, which makes it possible to create complex shapes and exact measurements. As PC, PA, PET, and POM plastics have several advantageous qualities that make them suitable candidates for CNC machining, it is possible to produce accurate, robust, and useful parts for a variety of uses.