Best Ways to Cut 3D Printed Plastics
4 min
- Recommended Tools for Cutting 3D Printed Plastics
- Tips for Cutting 3D Printed Plastics
3D printing allows us to produce custom designs with precision and flexibility, but when 3D printing with plastic materials, you may need to modify or optimize the printed part, and reprinting the original part is too time-consuming, so cutting 3D printed plastics is a common task. In this article, we will introduce the best ways for cutting 3D printed plastics, including tools and tips to help you cut away excess material for a better fit and functionality.
Source: https://www.instructables.com/How-to-Make-a-Plastic-Cutting-Hot-Knife/
Recommended Tools for Cutting 3D Printed Plastics
When cutting 3D printed plastics, choosing the right tool is important for the quality of the cut. Here are some commonly used tools for cutting 3D printed parts:
The X-Acto knife is one of the most commonly used tools for fine work, especially when dealing with small parts and intricate details. It can easily cut common materials such as PLA, and is used for precise cutting along the edges of printed parts or removing small support materials.
The flat cutter is suitable for trimming filament supports close to the surface of the print. You can use it to remove support material or cut small parts without causing damage to the main printed part.
Hacksaws are suitable for large, solid 3D printed parts that require more force to cut, especially those made of materials such as ABS or PETG. Using a fine-toothed saw blade can reduce rough cut edges. To avoid unnecessary damage, it is recommended to maintain a steady force during operation.
The Dremel cutting tool is a versatile and efficient tool for fine cutting and adjustment. It is equipped with a rotating blade or cutting disc to help you make precise cuts, and it can also easily trim and repair small printing defects. Because its high speed may cause the plastic to melt, it is recommended to lower the speed when using it to ensure a smooth and neat cut surface and avoid uneven surfaces.
Special Tips
In some 3D forums and Youtube videos, many users said that heated knife cutting is a very effective cutting method. Using a gas blowtorch to heat the blade can easily cut common plastic materials such as PLA and ABS, and can ensure smoother cutting than traditional tools. This method can effectively prevent the edges of the material from breaking or melting during the cutting process, and ensure that the cut part is neat and without obvious defects to the greatest extent.
Tips for Cutting 3D Printed Plastics
If you want to achieve perfect cuts, you need to practice a bit before actually cutting the final object. Here are some tips for effectively cutting 3D printed plastics:
Wear safety gear when cutting plastics: There is a chance that stray plastic fragments can fall on you or get into your eyes. Protective gloves are also recommended to prevent you from being cut by the sharp edges of the plastic.
Before cutting, draw a reference line: Masking tape can serve as a good reference for marking the cut line. You can remove the tape after the cut is complete.
Work slowly and steadily: Rushing the cut can result in jagged edges, cracks, or uneven surfaces. Whether you are using flat-nose pliers, a hacksaw, or a Dremel tool, work slowly and carefully to ensure a smooth and precise cut.
Use sandpaper to smooth the edges: Sandpaper of varying grits or a metal file can be used to remove rough spots and polish the cut surface. Always start with a coarser grit and gradually transition to a finer grit to achieve a smooth surface.
Related article: How to Split Large 3D Prints for Better Quality and Assembly
How to Glue 3D Prints: A Complete Guide for Seamless Connections
Cutting 3D printed plastics is not difficult, but choosing the right tools and techniques is key to achieving the desired results. If you’re looking for high-quality 3D printing services or need help post-processing your prints, check out JLC3DP for a range of solutions to suit your needs.
Keep Learning
Why Your 3D Prints Need Threaded Inserts: MJF & SLA Guide
Designing reliable threads in plastic parts is one of those details that seems simple until a prototype actually gets assembled. A screw may go in fine the first time — maybe even the second. After that, the threads start to loosen, plastic begins to deform, and the joint slowly loses its grip. This is where engineers typically weigh two options: printing threads directly into the part, or installing threaded inserts for 3d printed parts. Both approaches have their place. Printed threads can work well......
Sand 3D Prints: Grits, Techniques & Materials
Key Takeaways Choose the right sanding 3D Prints approach: Consider the material, surface defects, part geometry, and required finish before starting. Select the right sandpaper grit: Start with a suitable grit and progress to finer grits to reduce scratches. Wet sanding vs. dry sanding: Choose the approach based on the material and sanding requirements. PLA requires careful heat control, while resin prints need material-specific post-processing and dust precautions. Metal parts may require alternativ......
PLA Smoothing: How to Get Smooth PLA Prints (Method-by-Method Guide)
PLA 3D prints often show visible layer lines, seams, and rough surfaces, especially on curved or angled areas. PLA smoothing helps improve surface quality and prepare parts for painting or other finishing processes. Explore these 3D print smoothing methods to learn more about different finishing techniques. However, not every method works equally well on PLA, and some techniques can affect dimensional accuracy or damage fine details. Before and after pla 3d prints smoothing This guide compares common ......
How to Smooth 3D Prints: The Main Methods from Sanding to Polishing
In the field of 3D printing, the surface quality of the finished product directly affects its appearance and functionality. Although 3D printing technology has made great progress, due to the principle of stacked printing, obvious layer lines often appear on the finished product, which not only affects the visual effect, but may also affect its performance in some applications. Therefore, it is particularly important to smooth the 3D printed parts. Smoothing can not only enhance the appearance of the ......
How to Smooth the Top Layer of a 3D Print
The top layer of a 3D print is the most visible part of the model, and problems such as uneven surfaces, gaps, or brushing can affect the appearance and usability of the print. The right settings, techniques, and post-processing can minimize these defects. If your 3D print top layer is not smooth, the cause may be incorrect print settings, insufficient top-layer thickness, or inadequate support beneath the surface. This guide covers common top-layer problems and practical ways to improve surface quali......
A Comprehensive Introduction to 3D Printing Post-Processing Techniques
Importance of 3D Post-processing Post-processing is critical in 3D printing because it provides numerous advantages that improve the overall quality and usability of printed objects. For instance, the visual appeal of 3D-printed objects is greatly enhanced by post-processing techniques. Through the use of finishes, layer line removal, and surface smoothing, post-processing can turn an uneven and textured print into a polished and smooth result. This is especially crucial for items meant for presentati......