Is 3D Printing Strong Enough for Functional Parts?

1. Yes — With the Right Material and Technology

3D printed parts can be surprisingly strong. The key is choosing the right combination of material, technology, and print orientation for your application.

2. Strength by Technology

FDM

• Nylon: Excellent impact resistance and flexibility

• ABS: Good all-around strength, heat resistant to ~100°C

• PETG: Chemical resistant, good for outdoor use

• Carbon Fiber Nylon: Exceptional stiffness-to-weight ratio

• Polycarbonate: Highest impact resistance of FDM materials

MJF

• Nylon PA12: Strong, durable, used in aerospace and automotive

• Glass-filled Nylon: High stiffness, heat resistant

• Parts are strong in all directions (isotropic)

SLA

• Tough Resin: ABS-like strength

• Functional Resin: Designed for snap fits and assemblies

3. Real-World Applications We’ve Printed

• Automotive brackets and mounts

• Drone frames and landing gear

• Jigs, fixtures, and tooling

• Enclosures for electronics

• Functional hinges and snap-fit assemblies

• Replacement parts for machinery

4. Design Tips for Strong Parts

• Orient for strength — Layer lines are weakest point; orient so loads run parallel to layers

• Increase wall thickness — Thicker walls = stronger parts

• Use infill strategically — 50–100% infill for structural parts

• Add fillets — Round internal corners to reduce stress concentrations

• Choose MJF for isotropic strength (equal in all directions)

Not sure if your part can handle the load? Send us your design and our engineers will recommend the best approach.