Custom metal housings are the shells that protect electronics, mechanisms, and instruments from shock, dust, and the weather—the milled case around a sensor, the bent enclosure on a control box, the extruded rail that frames a device. A good housing seals, shields, dissipates heat, and mounts cleanly; a bad one leaks, rattles, or will not close. This guide covers the housing types we build, the processes that keep them accurate and affordable, and how to specify them so they arrive ready for assembly rather than for a rework bench.
The Housing Job
A housing has to do several jobs at once: protect the internals, locate them, shed heat, block noise or water, and look finished. The same enclosure-thinking behind our custom metal enclosures applies: the housing is designed around how it is made and how it is installed, not just how it looks on a drawing. When a cover will not seat or a gasket will not compress, the whole product slips its schedule.
Milled Housings
For low-to-mid volume and tight features, we CNC mill the housing from a solid block, cutting the cavity, the mounting bosses, and the connector ports in one setup so they stay located to a datum. This gives the best accuracy and the cleanest internals, which is why we use it for sensor and instrument cases. Where a round feature or insert is needed, we add CNC turning in the same program so the part is complete off the machine.
Bent and Laser-Cut Housings
For higher volume or thin-wall boxes, we cut the blank on laser cutting and form it on CNC bending, then add machined inserts and seals. This is faster and cheaper than milling a block, at the cost of some feature flexibility. Our bend program accounts for springback so a batch of angles stays within tolerance and the panels go together without shims—a tenth of a degree of creep across a seam is what turns a clean box into a rattling one.
Extruded Housing Frames
Long or frameless devices often use aluminum extrusion for the rails and end plates, which gives high stiffness at low weight and cost. We machine the critical faces and holes on the extrusions so the frame locates the internals precisely. The same strategy we apply to custom metal manifolds—shape the low-stress geometry, machine only what must be accurate—keeps an extruded housing both cheap and correct.
Sealing, Shielding, and Finish
Housings often need a gasket seat, an EMI shield, and a finish. We hold the gasket face flat so the seal compresses evenly, control edges for shield contact, and apply powder coating for a durable skin while masking the faces that must stay conductive or sealed. The finish follows the deployment: a coastal unit earns a heavier corrosion package than an indoor one, and we specify per environment rather than by default.
Quality and Inspection
We gauge cavity dimensions, hole patterns, flatness of sealing faces, and bend angles, and we check coating coverage on weather-exposed parts. For housings in safety or outdoor paths we provide material certs where required. Batch consistency is the real metric because a thousand cases must close the same, and a misfit cover is a visible defect on a finished product that a single perfect sample cannot represent.
How to Request a Quote
Send the model or drawing with material, finish, volume, and the environment (indoor, outdoor, coastal). Tell us which hardware and seals the housing must accept so we locate features to the real components. With those inputs we return price, lead time, and DFM notes that typically improve sealing or cut cost before you tool up.
From Prototype to Production Run
We start with a sample to prove fit around your actual internals, then scale once the cavity and seals are locked. We keep fixturing and process notes for the production run so the thousandth case matches the first, and we record milling, bending, and finishing parameters for identical reorders. If volume justifies it, we move from milled to laser-and-bend or extruded routes to lower unit cost.
Frequently Asked Questions
Milled or bent housing?
Milled for tight features and low volume; laser-cut and bent for higher volume and thin-wall boxes at lower cost.
Can you hold a flat gasket face?
Yes. We gauge sealing faces so the gasket compresses evenly and the enclosure stays watertight.
Do you make extruded frames?
Yes. We use aluminum extrusion for rails and end plates, machining only the critical locating faces.
What finish suits outdoor housings?
Powder coat or anodize matched to the environment, with sealing and conductive faces masked.
Can you kit the internals?
We deliver loose or partially assembled housings; tell us what the line versus the site must do.
Thermal and Mounting Integration
Many housings also move heat or locate a board, so we design the walls and mounts as one system rather than separate features. A housing that dissipates heat needs a flat, finished interface face; one that locates a PCB needs accurate, burr-free holes. The same systems view we bring to telecom metal parts—where thermal and mechanical jobs agree—keeps a housing from optimizing one function and breaking another. We tie the cavity, the mounts, and any heat path to a common datum so the assembled product behaves the way the drawing promises.
Ready to Start Your Project?
Get a build-ready quote on your custom metal parts within 24 hours. Share your drawing and our engineers will respond with process, lead time, and pricing.
