Nylon Filament Guide
Nylon (Polyamide, or PA) is one of the most capable engineering materials available for FDM printing. It offers a combination of toughness, flexibility, and wear resistance that no other common filament can match — making it the go-to choice when a part needs to flex without breaking, survive repeated mechanical stress, or hold up under friction. That said, Nylon earns its "Advanced" rating. It is the most hygroscopic material in common use, warps aggressively without the right setup, and demands a well-tuned printer environment. If you're coming from PETG and want to step up to true engineering-grade parts, Nylon is the natural next material to learn. Key strengths include exceptional impact and fatigue resistance, self-lubricating surfaces ideal for moving parts, strong inter-layer adhesion, and a heat resistance up to around 120°C depending on grade.
Nylon vs. PETG vs. PLA
| Feature | PLA | PETG | Nylon |
|---|---|---|---|
| Ease of Print | Very High | Medium | Low |
| Toughness & Flex | Low | Medium | Very High |
| Heat Resistance | Low (55°C) | Medium (80°C) | High (120°C) |
| Moisture Sensitivity | Low | Medium | Very High |
| Shrinkage / Warping | Minimal | Low | High |
| Wear Resistance | Low | Medium | Excellent |
Optimal Printing Settings
Nylon demands a more controlled environment than most filaments. An enclosure is strongly recommended to prevent warping. Dial in these settings as a starting point, then adjust based on your specific brand and printer.
Start at 250°C for most PA6 and PA12 grades. Some high-performance blends push closer to 270°C. A hardened steel nozzle is not strictly required for plain Nylon, but it is worth having if you plan to print Nylon-CF or other abrasive composites in the same family.
70–80°C works for most setups. Nylon does not grip PEI particularly well on its own — a PVA glue stick applied to the bed before printing is practically mandatory to get good first-layer adhesion without lifting.
Keep speeds conservative. Nylon benefits from slower, deliberate extrusion that allows good layer fusion. Pushing speed causes delamination and increases the chance of warp-induced print failures mid-job.
Run with the fan off for the entire print when possible. Nylon needs to stay warm to bond well between layers and to avoid corner lifting. A small amount of cooling (10–20%) is acceptable for bridging and overhangs only.
An enclosed print chamber dramatically reduces warp on anything larger than a small part. If you're printing on a Bambu P1S or any other enclosed printer, you're already ahead. Open-frame printers will struggle with Nylon on larger prints regardless of other settings.
Nylon Drying Time & Storage
Nylon absorbs moisture faster than any other common filament. A spool left open on a humid day can become noticeably degraded within hours. Popping, hissing at the nozzle, rough surface texture, and sudden stringing are all signs of wet filament — and with Nylon, the culprit is almost always moisture before it's anything else.
| Method | Duration | Temperature |
|---|---|---|
| Filament Dryer | 8–12 hours | 70–80°C |
Note: Nylon requires the highest drying temperature of any common filament — 70–80°C — and longer drying times than PETG or PLA. Verify your dryer can reach and sustain this range before relying on it. After drying, print directly from the dryer if possible, or transfer immediately to a sealed dry box. Open-air storage is not appropriate for Nylon under any circumstances.
Common Challenges & Solutions
Warping and Corner Lift
Nylon has significant thermal shrinkage as it cools. Corners and edges of larger prints will peel off the bed mid-print if the environment is not controlled, often ruining hours of print time.
Solution: Use an enclosure, apply a PVA glue stick to the build plate, keep the fan off, and use a brim for any footprint larger than a few centimeters. On open-frame printers, draft shields in the slicer can also help retain ambient heat around the print.
Moisture Absorption
Nylon absorbs moisture so readily that even a few hours of open-air exposure can degrade print quality. Symptoms include popping and hissing at the nozzle, bubbly or rough surface finish, and increased stringing.
Solution: Always dry Nylon before printing, even if the spool is new. Store all unused filament in a sealed container with fresh desiccant. Printing directly from a filament dryer is the most reliable approach for long print jobs.
Poor Bed Adhesion
Unlike PETG, Nylon often fails to grip the build surface at all without help. Bare PEI and bare glass both tend to release Nylon too early, especially as ambient temperature fluctuates.
Solution: A thin, even coat of PVA glue stick on the build plate before every print is the most reliable fix. Some printers use garolite (FR4) sheets specifically for Nylon due to their excellent natural adhesion with the material.
Stringing
Nylon flows freely at high temperatures and produces stringing between travel moves, particularly on complex geometries with lots of small features.
Solution: Tune retraction settings carefully and enable combing in your slicer to keep the nozzle over the print whenever possible. Confirming the filament is fully dry first will eliminate a large portion of stringing before you touch retraction at all.
Common Uses
Nylon is the material to reach for when a part needs to flex, endure repeated stress, or survive friction and wear over time. If PLA breaks and PETG bends too much, Nylon handles it.
Gears & Mechanical Parts
Self-lubricating and wear-resistant, Nylon is an excellent choice for printed gears, pulleys, and bushings that see regular motion.
Hinges & Living Hinges
The toughness and flex resistance of Nylon make it uniquely suited for parts that need to bend repeatedly without cracking or fatiguing.
Functional Clips & Fasteners
Snap-fit clips, latches, and retaining features that would snap in PLA or deform in PETG hold up well in Nylon under repeated use.
High-Temp & Under-Hood Parts
With a heat resistance up to around 120°C, Nylon is one of the few common filaments suitable for automotive and appliance environments.
Wear Pads & Guides
Anywhere a printed part contacts another surface repeatedly, Nylon outlasts all other common FDM materials by a wide margin.
Flexible Structural Parts
Parts that need some give without fully flexing — tool handles, mounts, and brackets that absorb vibration — benefit from Nylon's combination of stiffness and toughness.
Nylon Grades: PA6, PA66, PA12, and PA612
Not all Nylon filament is the same. The grade affects printability, moisture sensitivity, temperature requirements, and final part properties. Here is what the most common variants actually mean for your prints.
One of the most widely used Nylon grades in FDM printing. PA6 is tough with high tensile strength and excellent impact resistance, making it a strong choice for functional and mechanical parts. The drawback is that it absorbs moisture faster than almost any other common filament, which leads to bubbling and poor layer adhesion if the spool isn't properly dried. It also has a strong tendency to warp and requires a heated bed, enclosure, and careful setup. Typical extrusion temperatures run 250°C to 270°C. Parts gain improved dimensional stability and heat resistance after annealing due to increased crystallization.
Similar in composition to PA6 but with a slightly higher melting point of around 260°C. This gives PA66 superior stiffness, wear resistance, and heat resistance compared to PA6, along with low creep under sustained load — making it well suited for precision mechanical parts. Like PA6, it is highly hygroscopic and prone to warping, so dry filament storage, a bed temperature of 80°C to 100°C, and an enclosure are all effectively required. PA66 hardens considerably after annealing, and when subsequently exposed to humidity it becomes more ductile and impact resistant.
PA12 differs from PA6 and PA66 through its longer molecular chain, which results in significantly lower moisture absorption and better dimensional stability. This makes it less prone to warping and a more forgiving starting point for Nylon printing. Typical extrusion temperatures range from 240°C to 260°C. PA12 offers high impact resistance, strong chemical resistance, and greater flexibility than other Nylon grades. Because it absorbs less moisture, it also holds its dimensional accuracy longer in humid environments. Heat resistance reaches around 180°C, and the material responds well to annealing for further toughness and crystallization.
PA612 sits between PA6 and PA12 in most practical ways. It absorbs less moisture than PA6 while maintaining more stiffness than PA12, making it a well-balanced option for parts that need both mechanical strength and dimensional stability. It is easier to print than PA6 or PA66 and less prone to warping, which makes it versatile across both aesthetic and functional applications. Surfaces come out smooth, and the material is less brittle than other grades. Heat resistance is moderate — above PA12 but below PA66.
Carbon fiber reinforced Nylon adds significant stiffness and dimensional stability, and actually warps less than plain Nylon grades. The tradeoff is that CF composites are highly abrasive and will wear out a brass nozzle quickly. A hardened steel nozzle (0.4mm or larger) is required.
Nylon Cost
Nylon typically runs between $20–$40/kg for standard grades, with CF composites reaching $40–$60/kg or higher. It costs more than PLA and PETG, but the material properties justify the premium for parts that actually need them. Some well-regarded brands include Polymaker (PolyMide line), Bambu Labs, Overture, and Prusament.
Find the Best Nylon Price Right Now
Use the price tracker to compare live Amazon listings by brand, weight, and price per kg — so you know exactly what Nylon should cost before you buy.
Search Nylon Prices →