3D Printed Enclosures: Custom Housings for Electronics and Equipment

A 3D printed enclosure is a plastic box built up layer by layer. It guards a circuit board, a sensor, or a small machine part. You draw the box you need. We print it. There is no mold to pay for and no minimum order.

Buyers pick a printed box when a stock box will not fit. Maybe the board is an odd shape. Maybe you need a slot in one wall and a vent in the next. A printed box carries those features from the start. You do not drill or file anything.

The same file works at any count. Print one to check the fit. Print 500 when the design is locked. The shape does not shift between the two. For a quick overview of the part type, see our guide to 3D printed enclosures.

Start at 2 mm. That is the wall thickness most printed boxes need. Two millimeters gives you a stiff shell that takes a knock. Go to 3 mm on a big box, or on a lid people open every day.

Our upload check flags any wall under about 1.6 mm. Thin walls crack at the corners. They also flex when you tighten a screw. Half a millimeter more plastic costs pennies and buys real strength.

Round the inside corners. A sharp inside corner is where a box splits first. A small fillet spreads the load. Add a rib across a long flat wall if the wall feels springy. All seven checks are listed on our design checks page.

Two ways work. You can cut threads into the plastic. You can also press a brass heat-set insert into the wall. Brass wins when the lid comes off more than a few times. Plastic threads wear out. Brass does not.

A screw boss is the post the screw goes into. Keep the wall of a boss at 2 mm or thicker. Tie the boss to a side wall with a small rib so it cannot snap off. Most M3 heat-set inserts want a hole near 4.0 mm. Tell us the insert you buy and we size the hole to it.

Self-tapping screws are fine for a box you open once or twice. Leave the hole a touch smaller than the screw. The screw then cuts its own thread on the way in. Ask us and we set that hole size for your screw.

Leave a gap. A printed lid needs about 0.2 mm to 0.3 mm of clearance on each side. Draw the lid at the same size as the box and it will bind. Hot plastic shrinks a little as it cools.

FDM holds about plus or minus 0.5 percent, with a floor near plus or minus 0.5 mm. That is typical, not a promise. So a snap fit or a press fit needs one test part first. Order one, check the fit, then order the run. The tolerance entry in our glossary spells this out.

A lip beats a flat seam. Print a small step around the rim so the lid drops in and lines up on its own. Screws then pull it tight. A soft TPU gasket can sit in that step when you want to keep dust out.

Every cable hole needs a clean edge. A sharp edge cuts the wire jacket over time. Round the lip so the cable cannot chafe. Add a small notch beside the hole for a zip tie and the cable stays put.

Print vents as rows of short slots, not as one wide opening. A short span bridges clean. A long one sags in the middle. Keep any single open span near 10 mm or less and the vent comes out crisp. Our guide to printing without supports covers the same idea for other shapes.

Cutouts for a switch or a jack print best on a wall that stands upright. Hole size drifts a little, so a tight jack may need a test print. Flag the one cutout that must be exact. We hold that one closest.

Face the rough side down. The bottom of a box comes out smoother than a steep overhang. We pick the print angle for you. Just tell us which face people will see.

Match the plastic to where the box lives. PETG is the default for most jobs. It is tough, it takes water and shop chemicals, and it holds shape to about 73 C. PLA costs less but softens near 57 C, so keep it indoors and out of the sun.

ABS is the heat pick at about 98 C. Wide flat ABS walls can lift at the corners, so we watch that on big boxes. PA-CF is our strongest plastic at about 80 MPa, and it holds shape to about 140 C. TPU is soft and belongs on a gasket, never on the box body.

PLA and PETG get an instant price the moment you upload. ABS, PA-CF, and TPU route to a person. That person prices the job within 4 business hours. Full specs sit on the materials page.

Yes, with the right plastic. PETG and ABS hold up in sun and rain far better than PLA. PLA turns brittle outside. Black holds its color longest, since the pigment blocks some of the sun.

Sun does more damage than water. Pick the plastic first, then the color. For a box that lives outdoors all year, we start with black PETG and go up to 3 mm walls.

We do not rate boxes to an IP number or a UL listing. If your job needs a rated box, say so up front and we will tell you plainly what we can and cannot do.

These examples show typical jobs, not named customers.

A sensor team orders 25 PETG housings for a field trial. The lid takes four brass inserts. They test one box, then release the rest of the run.

A control panel shop reorders the same box twice a year. The file sits in their account, so each reorder takes three clicks.

You see one price per part. That per-part price drops at 10, 50, 250, and 1,000 parts. We hold your price for 30 days, so a PO has time to clear. There is no tooling bill and no minimum order. See how our pricing works or upload a file at the instant quote for a real number.

Most orders ship in 2 to 5 days. We print and ship in the USA, so customs never holds your parts.

Printing is not the answer every time. A box longer than 220 mm on a side does not fit our standard bed. We can split it, or quote a large-format run. Ask first and we will tell you which path is cheaper.

Very high counts change the math too. Past a few thousand of the same box a year, a mold can cost less per part. Printing still wins while the design can change. Compare total cost, not the per-part number. Our low-volume production page walks through that trade.

Need mounts and holders to go with the box? See 3D printed brackets and mounts. Need a part the maker no longer sells? See replacement parts.