CNC engineering plastic materials suitable for manufacturing wear-resistant parts, mechanical transmission parts, sliding structural parts, insulating parts, lightweight structural parts, guide parts, and medium to low load engineering plastic functional parts.
CNC Nylon 66 (PA66) is a nylon engineering plastic material manufactured through CNC machining methods, featuring good strength, rigidity, wear resistance, heat resistance, impact resistance, and mechanical stability. Compared to Nylon (PA)6, Nylon (PA)66 generally have better rigidity, temperature resistance, and dimensional stability, but toughness and water absorption still require attention. It is suitable for manufacturing wear-resistant parts, gears, sliders, guide parts, shaft sleeves, insulating parts, mechanical structural parts, and medium to low load engineering plastic parts.
By focusing on application scenarios, boundaries of advantages, and non-recommended scenarios, it helps sales, customer service, and quoting staff quickly determine whether the material meets current part requirements.
It has good strength, better rigidity than Nylon (PA)6, good wear resistance, good heat resistance, good impact resistance, good insulation, light weight, suitable for CNC machining, suitable for replacing some light-load metal structural parts, and suitable for mechanical transmission and sliding fitting scenarios.
Gears, sliders, guide rails, shaft sleeves, bushings, rollers, pads, guide blocks, wear-resistant plates, insulating plates, mechanical brackets, light-load structural parts, fixtures and jigs, conveying equipment parts, packaging equipment parts, automation equipment parts, non-metallic connectors, wear-resistant spacers, electrical insulation parts.
High-precision long-term dimensional stabilization parts, long-term immersion parts, high-temperature long-term load-bearing parts, high-rigidity heavy-duty structural parts, high-strength threaded parts, food direct contact parts, strong acid and alkali environment parts, long-term outdoor exposure parts, extremely wear-resistant precision transmission parts, and assembly parts extremely sensitive to water absorption deformation.
The following parameters come from product information and material knowledge fields, used for design review, quotation communication, and preliminary judgment before material selection.
| Material positioning | CNC engineering plastic materials suitable for manufacturing wear-resistant parts, mechanical transmission parts, sliding structural parts, insulating parts, lightweight structural parts, guide parts, and medium to low load engineering plastic functional parts. |
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| Precision performance | CNC nylon Nylon (PA)66 can achieve good machining accuracy and is suitable for ordinary structural parts, wear-resistant parts, insulating parts, and assembly parts. Compared to Nylon (PA)6, Nylon (PA)66 dimensional stability is usually slightly better, but it is still affected by water absorption, temperature, elastic deformation, internal material stress, clamping method, and processing heat. For precision assembly positions, it is recommended to reserve allowance and verify dimensional stability in actual usage environments. |
| Dimensional tolerances | The standard dimensional tolerances for CNC-machined nylon Nylon (PA)66 can be referenced as ± 0.05mm to ±0.20mm, while ordinary plastic structural parts can be evaluated at ±0.10mm to ±0.30mm. Large parts, thin-walled parts, elongated parts, and parts significantly affected by humidity may experience larger dimensional changes. This value is a general reference range and is not an absolute guarantee tolerance for all structures. It is recommended to mark tolerance requirements separately for precision mating surfaces, hole positions, bushing parts, and gear parts. |
| Minimum Wall Thickness | The wall thickness of ordinary CNC machined structures is recommended to be no less than 1.0mm. Thin-walled areas are prone to processing deformation, clamping deformation, or use deformation; large-area designs that are too thin are not recommended. It is recommended to thicken the load-bearing positions, thread positions, press-fitting positions, and sliding wear points appropriately. |
| Recommended wall thickness | For ordinary structural parts, 1.5mm-3.0mm is recommended; for bushings, bushings, sliders, gears, rollers, and load-bearing assembly positions, it is recommended to be at least 2.0mm; for large plate-shaped parts, elongated parts, and parts requiring flatness, it is recommended to increase thickness, reinforcement, or support structures to reduce deformation. |
| Minimum aperture | CNC drilling can achieve smaller hole diameters, but nylon materials are prone to burrs and wire drawing at the orifices. For general designs, the recommended aperture is no less than 1.0mm. Deep holes, small holes, threaded holes, and precision positioning holes should be evaluated based on tool length, chip evacuation, material springback, and deburring requirements. For precision hole positioning, it is recommended to drill the hole before reaming or secondary finishing. |
| Assembly clearance | For ordinary assemblies, it is recommended to reserve 0.10mm-0.30mm on one side; for sliding fits, it is recommended to reserve 0.20mm-0.50mm on one side; for moving parts, shaft sleeves, gears, and parts used in humid environments, it is recommended to appropriately increase the clearance. Since Nylon (PA)66 may expand after absorbing water, precision assemblies should not be designed to be too tight, or they may cause sticking, deformation, or assembly difficulties. |
| Detailed performance | CNC nylon Nylon (PA)66 is suitable for machining holes, grooves, steps, chamfers, fillets, tooth profiles, sliding surfaces, guide surfaces, and general structural details. Because the material is tough, overly small sharp corners, fine text, thin edges, and tiny grooves can easily cause burrs or unclear edges. Logos and text can be achieved through engraving, laser marking, or silkscreen printing, but complex textures are not recommended on high-wear or precision fit surfaces. |
| Surface effect | The original machined surface of CNC nylon Nylon (PA)66 is usually white, milky white, or pale yellow, with slight knife marks visible on the surface. After finishing, a relatively smooth plastic surface can be obtained, and grinding can improve burrs and edge quality. Nylon (PA)66 surfaces usually do not focus on a high-gloss appearance and are more suitable for functional and mechanical parts. After long-term use, the surface may turn yellow, darken, or show wear marks due to friction, oil stains, humidity, or UV exposure. |
Based on material characteristics and suitable product ranges, customer needs are broken down into easier application directions to determine.
Gears, sliders, guide rails, shaft sleeves, bushings, rollers, pads, guide blocks, wear-resistant plates, insulating plates, mechanical brackets, light-load structural parts, fixtures and jigs, conveying equipment parts, packaging equipment parts, automation equipment parts, non-metallic connectors, wear-resistant spacers, electrical insulation parts.
CNC engineering plastic materials suitable for manufacturing wear-resistant parts, mechanical transmission parts, sliding structural parts, insulating parts, lightweight structural parts, guide parts, and medium to low load engineering plastic functional parts.
Compared to Nylon (PA)6 CNC Nylon 66 (PA66), they generally offer better strength, rigidity, and temperature resistance, making them suitable for manufacturing mechanical transmission parts, wear-resistant parts, insulating parts, and medium- to low-load structural components. It is more suitable for engineering applications than ordinary plastics, lighter than metal, easier to absorb shocks, and has certain self-lubricating and friction-reducing properties. However, Nylon (PA)66 is still a nylon material with significant water absorption, and changes in humidity affect size and performance, making it unsuitable for precision components that require extremely high long-term dimensional stability.
Based on wall thickness, hole position, assembly clearance, dimensional tolerances, and material usage risks, determine in advance whether the part structure is suitable for Nylon 66 (PA66).
Post-processing of Nylon 66 (PA66) affects appearance, dimensions, hole position, assembly clearance, and usage validation results, and should be explained in advance during quotation, DFM review, and sample confirmation stages.
Post-processing should focus on appearance display, dimensional fitting, connection assembly, and testing verification. Parts involving assembly positions need to be reserved in advance for machining, coating, and trial assembly allowances.
For common issues such as threads, snaps, strength, temperature resistance, and weather resistance, identify in advance whether the material needs to be replaced or if another processing method should be used.
When customer demand exceeds Nylon 66 (PA66) material boundaries, it is necessary to combine strength, temperature resistance, toughness, long-term stability, and mass production goals to promptly recommend alternative materials or processing technologies.
If better dimensional stability and low water absorption are required, CNC Acetal (POM) can be chosen; If higher temperature resistance and strength are required, CNC Polyether Ether Ketone (PEEK), PPS, or Polycarbonate (PC) can be chosen; If better toughness and impact resistance are needed, Nylon (PA)6 or modified nylon can be chosen; If higher abrasion resistance and lower friction are needed, oil-based nylon, MC nylon, or Acetal (POM) can be chosen; If higher rigidity and load-bearing capacity are required,6061 Aluminum Alloy, 7075, or stainless steel can be chosen; If only low-cost structural parts are made, ABS, Polypropylene (PP), or ordinary engineering plastics can be chosen.
If customers require higher rigidity, temperature resistance, and mechanical strength than Nylon (PA)6, while still wanting to retain nylon's advantages in wear resistance, friction reduction, and lightweight design, CNC nylon Nylon (PA)66 is the right choice. If customers are more concerned about long-term dimensional stability, low water absorption, or precision transmission, it is recommended to prioritize Acetal (POM), Polyether Ether Ketone (PEEK), or metal materials. If the part is in a damp, water-soaked, or high-precision assembly environment for a long time, the Nylon (PA)66 should be used with caution and a larger dimensional allowance should be reserved.
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