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3D Printing for Mechanical Engineering

Functional gears, structural test parts, and custom fixtures — engineering-grade 3D printing for mechanical design validation.

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Mechanical Engineering Challenges

Prototype Lead Time

CNC machining of mechanical prototypes takes 2–4 weeks and requires fixture setup, tool changes, and programming for each new geometry.

Complex Assemblies

Multi-part mechanical assemblies with internal channels, undercuts, and tight tolerances are expensive to prototype with traditional methods.

Material Performance

Mechanical prototypes must withstand real loads, wear, and thermal cycling — ruling out most hobby-grade 3D printing materials.

3D Printing Solutions for Mechanical Engineering

Functional Gear Prototypes

Print spur gears, bevel gears, and worm drives in nylon or PA12 for functional testing of gear trains and drivetrain assemblies.

Structural Test Parts

Validate load paths and stress concentrations with PC-CF (90 MPa tensile) and PA-GF (95 MPa tensile) prototypes before metal production.

Custom Test Fixtures

Design and print test-bench fixtures, alignment jigs, and sensor mounts in 1–3 days instead of waiting for CNC machining.

Topology Optimization

Print topology-optimized geometries that reduce weight while maintaining stiffness — geometries impossible to machine from billet.

Recommended Technologies

Recommended Materials

Engineering Data & Validation

All our engineering-grade materials are supplied with published mechanical property datasheets including tensile strength, flexural modulus, impact resistance, and heat deflection temperature. We can provide first-article dimensional inspection reports for critical prototypes and recommend design-for-AM guidelines to maximize part performance.

Frequently Asked Questions

Can 3D printed gears handle real loads?

Nylon and PA12 gears handle moderate loads suitable for prototype validation. For production gears, they serve as proof-of-concept before investing in metal tooling.

What is the stiffest material you offer?

PC-CF (polycarbonate + carbon fiber) at 90 MPa tensile strength and 140 °C HDT. For even higher stiffness, PA-GF delivers 95 MPa at 200 °C HDT.

Can you print threads and precision fits?

We can print threads M6 and larger directly. For smaller threads or tight fits, we recommend printing undersized holes and tapping or reaming to final dimension.

How does SLS compare to FDM for mechanical parts?

SLS PA12 is near-isotropic with excellent fatigue resistance, ideal for complex geometries. FDM offers a wider material range and larger build volumes.

Can you assist with design for additive manufacturing?

We provide DfAM guidelines covering minimum wall thickness, hole sizing, support avoidance, and orientation strategy for your specific technology and material.

Print Your Mechanical Prototypes

Upload your engineering CAD file and get instant pricing. Nylon, PC-CF, PA-GF, and PA12 available.

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3D Printing for Mechanical Engineering | Gears, Fixtures & Testing | MAB | Manifattura Additiva Bresciana