CNC Machined Aluminum Enclosure, Extruded Aluminium Project Box for Electronics

This CNC machined aluminum enclosure begins as an extruded 6000-series aluminium profile that is then cut, milled, drilled and tapped to the drawing. Because the body of the aluminum enclosure is drawn as one continuous section instead of welded from sheet, the wall thickness stays even along the full length, so the internal cavity remains square and lid fit repeats from one unit to the next.

The aluminum enclosure is supplied in 6000-series aluminium alloy with a temper range of T3 to T8, and the working tolerance on machined features is plus or minus 10%. Surface treatment can be anodized, mill finished, polished, powder coated or sand blasted, so the same aluminum enclosure can be specified in a bright decorative finish for a display unit or a hard anodized finish for a housing that will be mounted outdoors.

Typical uses for this aluminum enclosure include electronics housings, power supply boxes, control and instrument enclosures, junction and sensor housings, and the small metal project box stage of a new product build. The rectangular extrusion also works as a heat sink housing where the flat face of the aluminum enclosure is used to mount boards or to dissipate heat from a driver or power stage.

Choosing an aluminum enclosure: start from the internal cavity rather than the outside size, because the wall section is fixed by the profile. Check the cavity against the PCB or component footprint, then decide whether the aluminum enclosure needs cutouts, a removable end plate or tapped bosses. Length is the easiest dimension to change, so a shorter or longer aluminum enclosure can be produced from the same profile tooling. Finally, match the finish to the environment: anodized for wear and corrosion, powder coated for colour, mill finish when the aluminum enclosure will be painted or machined again by the buyer.

Common buyer questions. Can the aluminum enclosure be supplied with custom cutouts and holes? Yes - punching, cutting, drilling and tapping are all part of the processing service, so send a drawing or a sample and the aluminum enclosure is machined to match. Is the extrusion profile fixed? Yes; the cross section comes from the die, while the length of the aluminum enclosure, the end plates and the machining are made to order. Which alloy is used? 6000-series aluminium alloy, which gives a good balance of strength, extrusion quality and anodizing response for this type of aluminum enclosure.