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Illustrative functional 3D printed robotic gripper, motor mount and sensor bracket with threaded inserts

For the people who make things

Making functional
3D printed parts.

Not just the right shape.
The right part for the job.

Your prototype fits. Now make it hold, move, clamp or carry. We help turn your 3D design into a printed part built around what it actually needs to do.

Let's make it work
Actual 3D printed partsYour design, reviewedReal-world requirements

From fits to functions

A 3D printed part has only 15–30% of the strength of an injection molded part.

A successful test fit doesn't tell you how a part will behave under load, heat or repeated use. The numbers below are why.

How the part is madeTypical strengthTooling cost
3D printed~15–30% of molded — weakest across the layersNone
Injection molded100% — strong in every directionTens of thousands of dollars
Forged carbon (our process)Molded-class strength — no weak directionPrinted mold — a fraction of cut tooling

Rough planning figures, not test data. Your part will vary — the pattern won't.

The full breakdown — why printed parts are weaker, and where forging closes the gap

Independent bend test

Forged carbon can match aluminum. That makes it a great alternative to metal.

EasyComposites ran the same bend test on five materials and published the charts. Forged carbon carried more load than aluminum before it broke — and the optimized version carried the most of anything tested. The 3D printed samples in the same test never got close.

MaterialPeak load in the bend testHow it behaved
Optimized forged carbon~350 kg — highest of all fiveCarried well past aluminum before failing.
Forged carbon~230 kgMore than aluminum — then broke suddenly, as carbon does.
Aluminum~175 kgDidn't break — it bent and kept carrying load to the end of the test.
Markforged (3D printed)~100 kgBroke early, at roughly half the load aluminum carried.
Onyx (3D printed)~40 kgLowest of all — failed long before the others.

Figures are read from EasyComposites' published bend-test charts — approximations. Your part will vary with geometry and fiber content. Source: EasyComposites.

Why the printed samples lose

A 3D printed part is built with a built-in weak direction.

A 3D printed part is built layer on layer. The bond between layers is the weak point — load that runs across the layers pulls them apart, so the part fails at a fraction of what the material itself can do. That's why the printed samples broke early no matter how good the material sounds on a datasheet.

Forged carbon has no layers. Chopped fiber is compressed into the mold under heat, so it carries load in every direction — which is how it reaches aluminum-class strength without aluminum's weight.

See the full strength breakdown

Put your design to work

What are you making?

Robotics & RC

Grippers · sensor mounts · motor brackets

Parts that hold alignment, connect to hardware and keep your project moving.

Workshop & everyday fixes

Jigs · clamps · adapters · replacement knobs

Custom geometry for the machine, tool or awkward space you already have.

Camera & creator gear

Cable guides · equipment mounts · custom holders

A better fit for your setup, with connections and repeated handling considered.

Example applications. Pictured parts are illustrative.

Straight from the shop

Real e-cycle parts. Complex shapes, forged.

Actual parts we made with our forge process for electric cycle projects — very complex shapes that would be expensive and difficult to make in aluminum. Every part shown is forged carbon; what differs is surface finish. Unpolished parts show the print lines. Polished parts reveal the carbon fiber underneath.

Suspension arms with brake mounts
Unpolished finish

Suspension arms with brake mounts

Forged around a disc brake caliper and anodized hub inserts.

Suspension arm, caliper fitted
Unpolished finish

Suspension arm, caliper fitted

Shown with the brake hardware the arm was designed around.

Same arm, reverse side
Unpolished finish

Same arm, reverse side

One forged form — the print lines stay visible unpolished.

Rocker arms with rod ends
Polished finish

Rocker arms with rod ends

Polished so the carbon fiber shows through. Pictured on the assembly fixtures.

Coil-over shock ends
Polished finish

Coil-over shock ends

Forged around the rod ends and springs they carry.

Shock eyes, two sizes
Unpolished finish

Shock eyes, two sizes

Bores and seats formed in the forging itself.

Shaft mounts
Unpolished finish

Shaft mounts

Four mounts carrying a single steel shaft.

Shaft mount, close up
Unpolished finish

Shaft mount, close up

The kind of complex geometry that is expensive and difficult to machine in aluminum.

Frame mounting blocks
Unpolished finish

Frame mounting blocks

Fitted to the frame extrusion, ready to pack. This bracket carries 200 lb of real-world force — a lighter and cheaper alternative to aluminum.

Mounting block
Unpolished finish

Mounting block

Another block from the same run.

Real parts from recent e-cycle work — not renders. Finish level is a choice: polished, or left with the print lines.

More than an infill setting

Function is designed into the part.

/01

Loads & geometry

Review where it bends, where it carries force, and where ribs or thicker walls could help.

/02

Material & environment

Match material to stiffness, impact, temperature and the conditions the part will see.

/03

Print direction

Consider layer adhesion, wall layout and orientation around the working loads.

/04

Connections & checks

Plan threaded inserts, mating surfaces and the checks needed for your application.

Your file.
A working next version.

Prepare a project brief
  1. 01

    Share the design

    Start with your model, what the part does and what isn't working in the current print.

  2. 02

    Review the working requirements

    Consider loads, temperatures, tolerances and connections before choosing a printing approach.

  3. 03

    Print, finish & check

    Agree the material and design, then define finishing and checks around the intended use.

Before you send the file

Materials, tolerances, timing and checks.

Typical figures for this kind of work. Your part decides the real numbers.

Which materials can you print?

Common starting points are PETG, ASA, nylon (PA12) and glass- or carbon-filled nylons. Heat-resistant options include PC and PEEK-class materials; TPU covers flexible sections. Material gets chosen against stiffness, impact, temperature and the environment your part actually works in—not by default.

What tolerances can a printed part hold?

Typically around ±0.2 mm on features under 100 mm and roughly ±0.5 mm across a 300 mm part, depending on process and material. Where a dimension really matters—a bore, a mating face, an insert seat—mark it on the drawing and we plan the print and finishing around it. Critical bores can be reamed or machined after printing.

How long does a part take?

Most single parts and small batches are back in roughly 5–9 days from an agreed design, including the review, print, finishing and checks. Larger runs, post-machining or secondary operations add time—we confirm the date before starting, not after.

How is a part checked before it ships?

Against the drawing or model you sent: overall dimensions, the features you marked critical, fastener and insert fit, and the mating surface. We also look for print defects that affect function—incomplete walls, delamination, porosity. If your part has a defined job, we agree a functional check with you: a load, a fit test, a cycle count. You get the results with the part.

Do I need CAD, or is a printed sample enough?

A STEP or STL is best. A printed sample, photos of it in place and the parts it mates with are often enough to start. Tell us which dimensions you cannot change.

What if my design won't work as printed?

We tell you before printing. Wall thickness, print direction and details that fail under load are the usual ones—we propose changes and agree them with you before anything is made.

Make the next print count.

Tell us what your part needs to do—not just what it looks like.

Start your project
FORGE3DPART / FUNCTIONAL 3D PRINTINGforge3dpart.com