No More “Cracks While Tightening”: How ABS Like Pro Solves Threading Challenges in 3D Printing Headphone Functional Prototypes

     2026.05.18                      NextShapes,ABS Like Pro,3D Printing                ＜1 minute                                                                                     

A consumer electronics brand’s design team faced a critical challenge while developing a new generation of over-ear headphones: the snap-fit structures inside the headband, earcup support brackets, and adjustable slider components all needed to deliver high impact resistance, sufficient rigidity to maintain shape, and support drilling and tapping for screw assembly of internal electronic modules. The team tested multiple general-purpose resins, but the results were disappointing—either the materials were too brittle and caused snap-fits to break, or they failed to hold reliable threads after tapping.

After evaluating several 405nm LCD/DLP photopolymer materials on the market, the team selected the black engineering-grade ABS Like Pro 3D resin from NextShapes. Test results showed that its elongation at break and impact resistance were comparable to traditional injection-molded ABS, while still maintaining excellent hardness. The printed parts were also easy to clean, with no sticky surface residue. After several rounds of functional validation, ABS Like Pro successfully met all assembly requirements for the headphone’s functional components used in 3D Printing applications.

Defining the Application Boundary Between ABS Like Pro and Other Prototype Materials

During the design validation phase, the team compared ABS Like Pro against standard rigid resins and flexible resins. Standard rigid resins provided high hardness, but frequently cracked during drilling and produced damaged threads after tapping. Flexible resins, on the other hand, lacked the holding force required for snap-fit mechanisms.

ABS Like Pro filled the gap between these two extremes. Its outstanding toughness allowed snap-fits to open and close repeatedly without deformation, while its higher mechanical strength enabled components to withstand bending stress inside the headphone band. Most importantly, the material supported drilling 1.5mm pilot holes and tapping M2 threads directly into the printed parts, producing clean threads capable of meeting required fastening torque specifications.

Designed specifically for LCD/DLP 405nm curing systems, ABS Like Pro delivers excellent

dimensional accuracy even on standard desktop resin printers, making it highly suitable for lcd 3D printing technology workflows. Unlike industrial injection molding, the material eliminates the need for expensive tooling, allowing rapid iteration of complex mounting posts and retaining ribs used inside headphone assemblies. The team emphasized that ABS Like Pro is far more suitable for functional prototypes, low-volume production parts, and assembly verification than for appearance-only display models in 3D printing for product design.

The Role of ABS Like Pro in a Digital Manufacturing Workflow

Today, ABS Like Pro has become fully integrated into the design team’s daily workflow and is compatible with mainstream slicing software. The resin features a matte black finish, supports layer heights between 50–100µm, and produces smooth surfaces with minimal visible layer lines after support removal.

Compared with engineering thermoplastics, ABS Like Pro offers low shrinkage, allowing headphone slider friction components to maintain dimensional tolerances within ±0.1mm. This precision enables direct tapping and assembly without secondary machining operations, making it ideal for high-accuracy 3D printing projects.

The material is particularly well-suited for three categories of applications:

• Prototype housings for over-ear headphones requiring drop resistance and sweat resistance 

• Snap-fit assembly parts, such as battery covers and cable retention clips 

• Fixtures and positioning tools, such as alignment blocks, are used in headphone testing jigs 

Because of its enhanced toughness, threaded posts printed with ABS Like Pro can withstand repeated assembly and disassembly cycles without stripping, addressing the long-standing issue of traditional photopolymer resins being “hard but fragile.”

To further verify long-term reliability, the customer team conducted 500 snap-fit open/close cycles and three separate 1.2-meter drop tests. ABS Like Pro components showed no cracking or permanent deformation, proving the reliability of 3D printed engineering parts in wearable electronics development.

How Material Toughness Solved Headphone Assembly Problems

Before switching to ABS Like Pro, the team repeatedly encountered the same frustrating issues. Printed headband slider components would crack along the edges during drilling. Even after carefully tapping threads, stress fractures would appear at the base of screw posts within days of assembly. Snap-fit structures on headphone housings often broke during the second installation attempt.

These failures consumed significant printing time and delayed project schedules, forcing engineers to repeatedly redesign structures simply to compensate for the brittleness of the materials commonly used in 3D resin manufacturing.

After adopting ABS Like Pro, the situation changed dramatically. Printed slider components could be drilled directly using a 1.8mm drill bit, producing smooth hole walls without chipping or burrs. M2 threads could then be tapped manually, generating continuous and well-defined threads. Even after inserting and removing screws more than ten times, the threaded holes still maintained reliable fastening strength.

The most significant breakthrough came from the snap-fit performance. Whereas other resins fractured once the snap-fit deflection angle exceeded 30 degrees, ABS Like Pro supported a 2mm engagement travel and could withstand more than 20 repeated open-and-close cycles while maintaining its elasticity.

Ultimately, the team used ABS Like Pro to print the battery cover latches, cable clips, and telescopic slider components of the headphones. On the assembly line, no adhesives or thermal assistance were required—pure mechanical fastening alone achieved production-level standards.

This unique combination of drillability, tappability, and repeated assembly durability has made ABS Like Pro an indispensable engineering material for 3D printing for product design and headphone functional validation.

Apply It Now and Accelerate Headphone Product Development

NextShapes continues to develop advanced solutions for functional photopolymer materials. ABS Like Pro has already helped multiple wearable device manufacturers rapidly transform concept designs into wearable, testable, and fully assembled physical prototypes through professional 3D Printing workflows.

The material not only shortened the delivery cycle of headphone structural parts—from 5–7 days with outsourced CNC machining to just 1 day with in-house printing—but also reduced per-part production costs by approximately 70%.

Thanks to its durability and easy post-processing, design teams can iterate multiple versions of snap-fits and threaded posts within a single day, then immediately use the parts for functional validation and low-volume pilot production.

Try ABS Like Pro today and bring toughness, strength, and machining convenience into your next headphone or wearable device project powered by advanced lcd 3D printing technology and high-performance 3D printed engineering materials.