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Why Does My Filament Keep Breaking

  • 5 min read

Why Does My Filament Keep Breaking? Causes and Solutions

As any seasoned 3D printing enthusiast knows, the journey from concept to creation isn't always smooth. A common hurdle that many face is filament breakage, an issue that can throw a wrench in the most meticulously planned printing projects. If you've ever found yourself asking, "why does my filament keep breaking," you're not alone. This guide delves into the root causes of filament breakage, ranging from the use of low-quality materials to mechanical mishaps. We will also explore proactive steps to prevent this problem, ensuring smoother and more reliable 3D printing experiences.

Common Causes of Filament Breakage

Understanding the common causes of 3D printer filament breaking is the first step in preventing them. Here are some key factors that contribute to filament breakage:

Low-quality or Aged Filament

The quality of the filament is paramount in 3D printing. Low-quality filaments often have inconsistencies in their diameter and composition, making them prone to snapping under tension. Additionally, filaments can degrade over time, especially if exposed to humidity and temperature fluctuations. This degradation can make them brittle and more likely to break.

Tension and Misalignment Issues

The path your filament takes from the spool to the extruder can also be a source of problems. Excessive tension or sharp angles in this pathway can put undue stress on the filament, causing it to snap. Similarly, misalignment in the filament feed system can lead to increased resistance and tension, resulting in filament breaking mid print.

Clogged Nozzles

A clogged nozzle is another common culprit in filament breakage. When the nozzle is partially or fully blocked, the filament cannot pass through smoothly, leading to increased pressure and filament breaking in extruder. This can be caused by a variety of factors, including the use of filaments with impurities, not cleaning the nozzle regularly, or printing at incorrect temperatures.
Recognizing and addressing these common causes can significantly reduce the instances of filament breakage in your 3D printing endeavors.

What to do to prevent filament breakage from happening?

Having understood the common causes of filament breakage, the next step is to explore effective strategies to prevent this issue. Here's what you can do:

Use High-Quality Filament

Investing in high-quality filament is the first line of defense against breakage. Quality filaments are more consistent in diameter and composition, reducing the risk of snapping under tension. They also tend to be more resistant to environmental factors that can lead to brittleness.


At AnkerMake, we take pride in our high-quality PLA 3D printer filaments, specifically designed for durability and high-speed printing. Rigorously tested for over a year in our Speed Lab, our filaments have proven to be exceptionally resistant to breakage. With a remarkably low shrinkage rate of just 0.33%, they not only ensure precise and accurate printing but also significantly enhances resistance to brittleness. Trust AnkerMake for filaments that are as reliable as they are easy to work with, ensuring smoother, more successful prints every time.

Proper Filament Storage

Proper storage is vital to maintain the integrity of your filament. Filaments can absorb moisture from the air, leading to brittleness. Store your filaments in a dry, cool place, preferably in airtight containers with desiccants to keep moisture at bay.

Correctly Mount the Filament Spool

Ensure that your filament spool is mounted correctly and that it unwinds smoothly without excessive tension or sharp angles. A smoothly rotating spool will minimize stress on the filament and reduce the chances of breakage.

Optimize Print Settings

Adjusting your printer's settings can also help prevent filament breakage. This includes adjusting the temperature, print speed, and flow rate to suit your specific filament type. These tweaks can improve the overall printing process and reduce the likelihood of filament issues. Manufacturer recommendations are a good starting point, but don't hesitate to experiment to find the best settings for your specific printer and filament combination.

Regular Maintenance

Regularly maintaining your 3D printer is essential. This includes cleaning the nozzle to prevent clogs, checking for any misalignments in the filament path, and ensuring that all moving parts are functioning smoothly. A well-maintained printer is less likely to encounter problems that can lead to filament breakage.
By implementing these strategies, you can significantly reduce the risk of filament breakage and ensure a more reliable and efficient 3D printing process.

Optimize Filament Usage with Advanced 3D Printers

Having delved into the common causes of filament breakage and armed with strategies to prevent it, it's essential to consider the significant role the 3D printer itself plays in these efforts. At AnkerMake, we're proud to introduce our advanced 3D printers, the AnkerMake M5 and M5C, specifically engineered to optimize filament usage while enhancing the overall printing experience.

Our AnkerMake M5 3D Printer is a testament to what modern 3D printing technology can achieve. It's not just fast, boasting speeds up to 500 mm/s, but also incredibly precise, with a detailed accuracy of 0.1 mm. This combination ensures that filaments are used effectively, creating detailed and crisp prints every time. Add to this the integrated AI camera and the advanced 7×7 auto-leveling system, and you have a machine that not only saves filament but also delivers precision with every print.


Elevating user convenience, our AnkerMake M5C 3D Printer comes packed with features like multi-device control with our AnkerMake app and customizable one-click operations. It boasts the same impressive speed as the M5 and further enhances filament efficiency with its high extrusion flow rate of 35 mm³/s. The M5C's direct drive extruder is designed for precision, and the robust all-metal hotend ensures smooth and consistent filament extrusion. This design significantly reduces the likelihood of filament jams and breakage, making for a more efficient and hassle-free printing process.
Choosing our AnkerMake M5 and M5C means embracing a blend of speed, accuracy, and efficiency. With AnkerMake, experience the peace of mind that comes from reliable, high-quality printing, where every filament feed is smooth, and every print reflects excellence.


To conclude, addressing the persistent question of "why does my filament keep breaking" is key to enhancing the efficiency and quality of your 3D printing projects. By acknowledging the crucial role of high-quality filament, proper storage conditions, correct filament spool mounting, and optimized printer settings, we can significantly reduce the risk of filament breakage. Regular maintenance of your 3D printer is equally important to ensure its optimal performance. Remember, prevention is better than cure. By implementing these strategies, you can enjoy a more seamless and productive 3D printing experience.


Can using an enclosure help prevent filament breakage?

Yes, an enclosure can help prevent filament breakage. It maintains a stable temperature, protects against drafts, and can control humidity, reducing thermal stress and material contraction that often cause filament breakage. This is particularly beneficial for sensitive materials like ABS or Nylon.

How do I know if my print settings are causing filament breakage?

If your print settings are causing filament breakage, you might notice frequent extruder clicking, inconsistent extrusion like thinner layers, or the filament being ground by the extruder gear. These issues usually point to incorrect temperature, speed, or tension settings. Adjust these settings one at a time to see if the problem resolves.

Is filament moisture absorption a common cause of breakage?

Yes, filament moisture absorption is indeed a common cause of breakage in 3D printing. Most filaments, especially those made from materials like PLA, ABS, and Nylon, are hygroscopic, meaning they absorb moisture from the air. The absorbed moisture can make the filament more brittle, increasing the likelihood of it snapping or breaking during the printing process.