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Plastic
Machining

We offer custom-machined Plastic parts with short lead times and highly competitive pricing. A wide range of Plastic and surface finishing processes is available to meet your needs for high-quality prototypes and production parts.

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Nylon(PA)

Table of Contents

Basic Definition

PA, short for Polyamide, is commonly known as Nylon. It is a high-performance engineering thermoplastic formed by polycondensation of diamines and dicarboxylic acids. Typical commercial grades include PA6, PA66, PA12, PA46, etc.

Core Material Properties

  1. Mechanical Strength High tensile strength, impact resistance and wear resistance even under low-temperature environments. It features self-lubricating properties, low friction coefficient, suitable for moving mechanical parts without frequent oil lubrication.
  2. Chemical Resistance Resistant to most organic solvents, greases, oils and alkaline substances. Limited tolerance to strong acids, strong oxidants and moisture absorption.
  3. Thermal Performance Wide usable temperature range; retains structural stability at moderate high temperatures. Modified heat-resistant PA can serve continuous working temperature above 120°C.
  4. Moisture Absorption Characteristic Natural PA absorbs water from air, which slightly reduces rigidity but boosts toughness. Drying treatment is required before CNC machining or injection molding to avoid bubbling and surface defects.
  5. Machinability Solid PA stock rods, sheets and blocks are widely used for CNC turning, milling and 5-axis machining. It delivers smooth finished surfaces after precision cutting.

Main Advantages

  • Outstanding abrasion & anti-friction performance
  • Excellent toughness and anti-shock capacity
  • Lightweight compared with metal alloys
  • Good vibration and noise damping effect
  • Easy to machine, mold and post-process
  • Reliable resistance to fuel and lubricants

Common Limitations

  • Unmodified PA absorbs humidity easily, causing minor dimensional changes
  • Poor UV resistance without UV stabilizer additives
  • Slightly prone to creep under long-term constant load

Typical Industrial Applications

  • Precision mechanical components: gears, bearings, guide sliders, bushings
  • Automotive parts: engine connectors, cable ties, oil pipe fittings
  • Electronic insulation structural parts, connector housings
  • Medical disposable accessories (biocompatible modified grades)
  • Custom machined plastic fixtures, jigs and wear-resistant spare parts
  • Consumer hardware, textile loom accessories

Processing Forms

Raw PA materials are supplied as solid blocks, extruded sheets, round bars, and injection molding pellets. Filled variants (glass fiber reinforced PA, carbon fiber PA, molybdenum disulfide filled PA) are available to enhance rigidity, wear resistance or dimensional stability.

Material parameter table

Parameter NameReference Specifications
PriceDepends on raw material cost, part weight, machining complexity, order quantity and surface finish
Delivery timePrototypes: 3–5 working days; Bulk production: 7–15 working days
Wall thicknessMinimum 1.2 mm; ideal range 1.5–4 mm; thick walls require annealing to reduce internal stress
toleranceStandard tolerance ±0.08 mm; Precision tolerance ±0.03–0.05 mm (extra charge); Follow ISO 2768-m
Maximum part sizeCNC solid bar/sheet processing: 1200×1000×300 mm
Available PA Grades1. PA6 (Nylon 6, good toughness, low cost)2. PA66 (Nylon 66, high strength, heat resistant)3. PA12 (Low water absorption, stable dimension)4. Glass fiber reinforced PA6/PA66 (15%/30% GF, high rigidity)5. Carbon fiber-filled PA (wear-resistant, conductive option)6. MoS₂-filled PA (self-lubricating for gears/bearings)7. Flame retardant PA (UL94 V0 for electronics)

Frequently Asked Questions

  To shorten the delivery cycle of CNC workpieces, we start with the documents submitted by customers. Please provide complete and clear 2D drawings, 3D models, dimensional tolerances, surface requirements, and processing specifications, and specify special materials, surface treatments, and assembly standards. Avoid incomplete drawings, ambiguous markings, and version confusion.
Complete documents enable direct programming, order splitting, and production scheduling, cutting down repeated confirmation and supplementary work. Customers are also advised to finalize order quantity, delivery schedule, and special requirements in advance. Eliminating repeated communication and rework risks at the source accelerates the whole process and effectively shortens the overall lead time.

  With 12 years of expertise in CNC machining, YUEYI stands out from other manufacturers and middlemen. Our factory covers an area of 4,000 mu and is equipped with over 100 processing machines. We achieve a machining precision up to 0.001 mm, capable of producing high-precision components. Backed by standardized production management, our on-time delivery rate reaches 98%. As a direct manufacturer with full in-house production capacity, we control every production link without outsourcing. We deliver consistent quality, outstanding precision and reliable lead time, making us your trustworthy partner for CNC precision machining.

  Fast delivery is one of our key strengths. For 3D printing orders, we support delivery within 3 days, ideal for rapid prototyping and urgent sample requests. For regular CNC machining projects, the standard lead time is around 3 weeks.
We manage the whole process in-house, from drawing review and process planning to production, quality inspection, and shipment, with no intermediate links. Equipped with complete facilities and an experienced team, we reliably fulfill both urgent sample orders and mass production. We guarantee stable lead time and consistent quality to keep your projects on track.

  We offer a full range of surface treatments with rich color options. Our services include anodizing, powder coating, spray painting, electroplating, wire drawing, sandblasting, and polishing. Anodizing features various colors and strong anti-corrosion performance for aluminum parts. Powder coating and spray painting come with extensive color selections and durable coatings. Electroplating enhances luster and rust resistance. Wire drawing creates fine linear textures, while sandblasting delivers a matte finish. Polishing achieves a bright and smooth surface. All finishes can be customized in colors and styles to match your application needs.

  Yes, we fully provide complete material certificates and relevant test reports for all CNC-machined parts. All raw materials are sourced from qualified suppliers with authentic documentation. We can offer material certifications, dimension inspection reports, and quality test records upon request. Every product is strictly inspected before delivery. These official documents fully guarantee material compliance and product quality, supporting your quality audit and project requirements.

  We take strict quality control measures in advance to prevent non-conforming products. Every workpiece is fully inspected dimensionally and visually during and after production to ensure full compliance with design drawings and specifications.
In the rare case of non-compliant items, we will take immediate responsibility. We will promptly confirm the issues with you, then arrange free rework or remanufacturing as required. All related costs will be borne by us. We will also analyze the root cause to optimize our processes and avoid similar problems recurring. Our goal is to deliver qualified products steadily and safeguard your project progress.

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