A 3D printed housing looks smooth in the vendor’s sample photo and arrives with visible layer lines and a grainy texture. The vendor did not ship a bad part; the buyer specified “smooth finish” without defining the process, the orientation, or the acceptance sample — and every printing process leaves a characteristic surface that post-processing

An EV charger housing that cools perfectly in the lab derates in the sun, a power-electronics enclosure that seals against rain traps the heat that shortens the electronics, and a cable entry that looks sealed lets in water after a season of thermal cycling. Charging hardware lives outdoors, carries high power, and must survive both

A 3D printed part with a thread that strips on the third assembly is not a printing failure; it is a thread-strategy failure. Printed threads, tapped holes, and inserts each have a place, and the choice depends on the material, the load cycles, and whether the part will ever be disassembled. The designer who assumes

A metal 3D printed part is not finished when the build completes; it is a blank on a plate, full of residual stress, covered with supports, and carrying a surface that no drawing would accept. The post-processing chain — depowdering, stress relief, support removal, machining, and finishing — is where the printed blank becomes a

An RF enclosure that measures perfectly as a bare aluminum box fails its shielding test once the cover is screwed on and a gasket is fitted — the seam leaks at the corners, the gasket seat is too rough, or the plating thickness varies where the cover meets the wall. RF performance is decided at

A prototype enclosure clicks together perfectly on the third printed revision — then the same snap fit cracks on the tenth part from the same file. Nothing changed in the CAD; the difference is that printed parts carry hidden directionality, and a snap beam is one of the few features where that directionality decides success.

You upload the same enclosure file to two printing services and receive quotes that differ by more than half. Neither price is wrong, and the gap is not markup: one service packed your part poorly, one is charging for a finish the other includes free, and one quoted a different material than the file’s name

A product team needs a small run of silicone or urethane parts and faces a mold-making decision: machine a metal mold at high cost and long lead time, or print a mold and start casting in days. For low-volume runs, 3D-printed molds bridge the gap — the printed mold or master carries the geometry into

A 3D printed enclosure that survives a drizzle test fails after a day under a hose — water finds the layer lines, the screw holes, and the seam where the lid meets the body. Printed enclosures leak at three places: through micro-porosity and layer paths, through unsealed fasteners, and at the lid seam. Each leak

A prototype assembly is rarely best made by a single process. The housing may print quickly in resin, the shaft needs the strength and precision of machined metal, and the threaded joints need inserts that neither process provides alone. Hybrid prototypes combine printed parts, machined metal, and standard hardware, and they succeed when each part