Machining PA66 or Nylon: A Comprehensive Guide

Nylon CNC Machining is the process of shaping materials by removing unwanted material from a workpiece. More specific, in the manufacturing industry, machining is an essential process that is used to create parts for a wide variety of applications. One of the most popular materials for machining is PA66 or Nylon. In this article, we will provide a comprehensive guide on machining PA66 or Nylon.


What is PA66 or Nylon?

Nylon is a synthetic polymer that is widely used in various industries due to its excellent mechanical properties. PA6 and PA66 are thermoplastic materials that are characterized by their high strength, rigidity, and toughness. In addition, it also has good chemical resistance and can withstand high temperatures. Nylon is widely used in the automotive, aerospace, and electronics industries, among others. There are 2 types of Nylon: PA6 and PA6.6. More specific, The impact resistance of PA6 is better than PA6.6 and solubility resistance is also better. On the other hand, PA6 absorbs more water than PA6.6, as a result, it will dehydrate in warm and dry environments and become brittle.

milling parts in PA66 also called Nylon

Machining PA66: The Process

Machining PA66 or Nylon requires a good understanding of the material properties and the machining process. The following are the steps involved in machining PA66 or Nylon.

Step 1: Select the Right Tooling

The first step in machining PA66 or Nylon is to select the right tooling. The tooling used for machining PA66 or Nylon should be made of high-speed steel or carbide. It should also have a sharp cutting edge and be able to withstand high temperatures. The recommended tool angles for machining PA66 or Nylon are between 10 and 15 degrees.

Step 2: Set the Cutting Parameters

The cutting parameters for machining PA66 or Nylon depend on the material properties and the desired surface finish. The recommended cutting speeds for machining PA66 or Nylon are between 200 and 300 feet per minute. The feed rates should be between 0.002 and 0.008 inches per tooth. The depth of cut should be between 0.020 and 0.050 inches.

Step 3: Fixturing

Fixturing is the process of holding the workpiece securely during the machining process. The fixturing used for machining PA66 or Nylon should be designed to provide maximum support and stability. The recommended fixturing methods for machining PA66 or Nylon are clamping and vacuum chucking.

Step 4: Machining

The machining process for PA66 or Nylon involves cutting the material to the desired shape and size. The cutting process should be carried out with a constant flow of coolant to reduce the heat generated during machining. The coolant should be water-soluble and compatible with the material.

Step 5: Finishing

The finishing process for Nylon involves removing any burrs or rough edges on the workpiece. The recommended finishing methods for machining PA66 are deburring, sanding, and polishing.

Advantages of Machining PA66

Machining PA66 has several advantages, including:

High Strength: The plastic is a high-strength material that can withstand heavy loads and stresses.
Chemical Resistance: It is highly resistant to many chemicals, including oils, fuels, and solvents.
Heat Resistance: Nylon can withstand high temperatures without degrading or losing its mechanical properties.
Easy Machinability: PA66 is easy to machine, and it can be machined using standard machining equipment.

Applications of Machining Nylon

Machining PA66 is used in a wide range of applications, including:

Automotive: Nylon is used to manufacture parts such as gears, bearings, and fuel tanks.
Aerospace: PA66  is used to manufacture parts such as engine components, landing gear, and electrical connectors.
Electronics: Nylon is used to manufacture parts such as cable ties, connectors, and switches.
Industrial: PA66 is used to manufacture parts such as rollers, gears, and bearings for heavy-duty machinery.
Consumer goods: Nylon is used to manufacture parts such as kitchen utensils, sporting equipment, and toys.


Machining PA66 or Nylon is an important process in the manufacturing industry. In other words, it is essential to select the right tooling, cutting parameters, and fixturing methods to ensure a successful machining process. In addition, Nylon offers several advantages, including high strength, chemical resistance, and heat resistance. As a result, the industry uses it widely in various applications, including automotive, aerospace, electronics, industrial, and consumer goods. If you’re in need of machining PA66, be sure to work with an experienced and reputable machining provider to ensure the highest quality parts.