Filaments Explained


When it comes to 3D printing, the choice of filament is one of the most critical decisions to ensure your parts perform as expected. Below, we break down the key considerations and benefits of different materials:

Why Material Selection Matters

Cost Efficiency: Selecting the right material helps minimize costs by avoiding over-specification or unnecessary reprints.

Tailored to Application Needs: Each filament type is designed for specific applications, whether it’s structural strength, flexibility, or aesthetic finish.

Performance Under Conditions: Factors like heat resistance, UV exposure, and impact strength vary across materials and can influence the longevity and performance of your parts.

Understanding Filament Properties

Surface Finish and Aesthetics: PLA and PETG provide smooth finishes and are available in a variety of colors for visually appealing models.

Strength and Durability: Materials like ABS and Nylon offer high tensile strength and impact resistance, suitable for functional prototypes and mechanical parts.

Flexibility and Elasticity: TPU is the go-to filament for creating flexible parts like seals and vibration-damping components.

Weather and UV Resistance: ASA is an ideal choice for outdoor applications thanks to its excellent resistance to sunlight and weathering.

Key Filament Categories

Carbon Fiber Blends: Enhanced stiffness and lightweight properties for aerospace and automotive applications.

General-Purpose Filaments

PLA: Best for simple prototypes, decorative models, and low-stress applications.

PETG: Combines strength and flexibility, making it suitable for both functional and aesthetic parts.

Engineering-Grade Filaments

ABS: Durable and versatile for mechanical parts and enclosures.

Nylon: Strong, flexible, and wear-resistant for industrial components.

Specialty Filaments

ASA: Designed for outdoor use with excellent UV and weather resistance.

TPU: Flexible and highly durable for dynamic parts like seals or gaskets.

Achieving Optimal Results

To ensure success, material selection should align with the part’s intended use, environmental conditions, and design specifications. At CNC Express, we provide expert guidance to help you choose the best filament for your project, balancing performance, cost, and quality.

Filament Selection Guide


MaterialAdvantagesDisadvantagesApplications
PLABiodegradable, good surface finish, variety of colors, low cost, minimal environmental impact.Brittle, low strength and heat resistance, unsuitable for high-stress or outdoor applications.Prototyping, decorative models, low-stress parts, concept validation.
ABSDurable, high impact resistance, moderate heat resistance, versatile.Less UV and weather resistant than ASA, may degrade in outdoor environments.Functional prototypes, automotive parts, enclosures, consumer goods.
ABS Glass FiberEnhanced strength and rigidity, lightweight, retains durability.Can be brittle under extreme stress, lower elongation compared to standard ABS.Structural parts, automotive components, lightweight industrial tools.
ASAExcellent UV resistance, weatherproof, high impact strength, heat resistant.Higher cost compared to ABS, slightly less flexible than some alternatives.Outdoor parts, automotive trims, signage, functional prototypes requiring weather resistance.
PETGStrong, flexible, water-resistant, chemical resistant, food-safe.Lower rigidity than ABS, less heat resistant, can scratch easily compared to harder materials.Food containers, mechanical parts, outdoor applications, snap-fit components.
PETG Carbon FiberStiffer and lighter than standard PETG, strong, chemical resistant, minimal warping.More brittle than standard PETG, limited elongation under stress, higher material cost.Aerospace, automotive components, lightweight mechanical parts, tools.
NylonHigh strength, flexible, wear resistant, excellent for functional applications.Moisture absorption (requires drying), less UV resistant, limited heat resistance.Industrial parts, hinges, gears, bushings, tools, and structural components.
TPUFlexible, excellent abrasion resistance, high impact resistance, durable in dynamic applications.Limited structural strength, not ideal for rigid or heavy-load components.Seals, gaskets, flexible components, footwear, medical devices, vibration damping parts.
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High-volume manufacturing

Our high-volume manufacturing capabilities are designed to deliver precision and efficiency at scale. With advanced CNC technology, automated processes, and a highly skilled team, we can produce large quantities of parts efficiently, while maintaining the highest quality standards. Our streamlined workflow and attention to detail allow us to meet tight deadlines and reduce costs, without compromising on accuracy or reliability.

Your designs, to your deadlines

Thanks to our committed team, we take your designs and bring them to life in as little as 1 day.  We ensure fast turnaround without compromising quality, whether you need a small batch or high-volume production, we tailor our processes to meet your unique requirements, delivering precision and consistency on time, every time.

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Understanding our manufacturing workflow

This illustrated guide breaks down the manufacturing workflow, outlining each step necessary to produce high-quality final components. It highlights the information and specificities required at each stage, while also demonstrating how we minimise costs without compromising on quality.

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