CNC Nylon Machining Service
Nylon in CNC Machining
Nylon is a name for a family of synthetic polymers known technically as polyamides (PA). It is one of the most widely used and versatile engineering thermoplastics. Getzshape specializes in delivering high-quality nylon CNC machined parts, using advanced CNC milling and turning to achieve tight tolerances as low as 0.01mm. Our services cover rapid prototyping and low- to high-volume production with no MOQ.
Nylon 6/6 (PA 66)
The most common grade for machining. Offers a superior balance of stiffness, strength, and thermal stability. Specified for general-purpose mechanical components, gears, and structural parts.
- Tensile Strength: 80 - 90 MPa
- Flexural Modulus: 2.8 - 3.2 GPa
- Elongation at break: 40% - 100%
- Hardness (Rockwell): R118 - R121
- Heat Deflection Temp.: ~90 °C
Nylon 6 (PA 6)
The Tough Option. Slightly more ductile and offers higher impact resistance and better vibration damping than 6/6. Chosen for applications requiring enhanced toughness and energy absorption.
- Tensile Strength: 75 - 85 MPa
- Flexural Modulus: 2.6 - 3.0 GPa
- Elongation at break: 50% - 150%
- Hardness (Rockwell): R115 - R120
- Heat Deflection Temp.: ~75 °C
Glass-Filled Nylon
The Stiffener. Typically 30% glass fiber (PA 66 GF30). Significantly increases stiffness, tensile strength, and heat deflection temperature. Specified for parts requiring high rigidity and dimensional stability under load, but is highly abrasive on cutting tools.
- Tensile Strength: 180 - 210 MPa
- Flexural Modulus: 8.5 - 9.5 GPa
- Elongation at break: 2% - 4%
- Hardness (Rockwell): R120 - R122
- Heat Deflection Temp.: ~250 °C
Subtypes for Nylon We Work with
Specifying the correct grade of Nylon is a critical first step, as each variant offers a distinct performance profile. Nylon is a family of synthetic thermoplastic polymers known for its excellent balance of strength, toughness, and chemical resistance.
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Advantages of Stainless Steel
Strength and Durability
One of the most significant advantages of nylon is its exceptional mechanical performance. It possesses high tensile strength and toughness, meaning it can withstand heavy loads and significant impacts without fracturing.
Chemical and Heat Resistance
Nylon exhibits impressive resistance to a wide array of chemicals, which is crucial for its use in industrial and automotive applications. It is largely unaffected by oils, greases, fuels, and many solvents, preventing degradation when exposed to these common substances.
Low Friction
Low coefficient of frictionallows nylon parts to move against each other or against metal components with minimal resistance, reducing wear and operational noise. This characteristic is particularly valuable in applications like gears and bushings.
CNC Machining Technical Considerations
There are several unique challenges in nylon machining compared to metal machining. Success depends on a process optimized to manage heat and material behavior.
- Sharp cutting tools are non-negotiable. Tools designed for plastics, such as high-positive-rake, uncoated carbide or HSS end mills with a single "O-flute" design, are optimal. Dull tooling will rub instead of cut, generating excessive heat and causing melting.
- The guiding principle is to evacuate chips before they can melt. This generally requires high spindle speeds combined with aggressive feed rates. The goal is to create a distinct chip and minimize contact time between the tool and the workpiece.
- Nylon is a poor thermal conductor and has a low melting point. Heat generated during cutting concentrates at the tool edge. Failure to manage this heat results in "gumming," where melted material fuses to the tool and ruins the part's surface finish and dimensional accuracy. Use of compressed air, coolant mist, or non-oil-based flood coolants is essential.
- Nylon's lower stiffness makes it susceptible to deflection or marring under clamping pressure. Use of soft jaws, reduced clamping force, or custom-profiled fixtures is often necessary to hold parts securely without deformation.
Applications
Nylon has been applied in multiple industries due to its excellent mechanical properties. Optimal use cases for CNC-machined nylon are as below.
- Jigs, Fixtures, and Nests: Leveraging Nylon's non-marring properties to create durable tooling for manufacturing and assembly lines.
- Low-Volume Production & Bridge Tooling: Manufacturing end-use parts for quantities typically under 1,000 units, where the cost of an injection mold is not viable.
- High-Precision Mechanical Components: Gears, bushings, wear pads, and insulators where tight tolerances are required.