Looking for a PCBWay alternative for machined parts? Here is the structural difference.

For the right part, yes — and the honest answer starts with what the company is. PCBWay is a China-based manufacturer whose foundation is printed circuit board prototyping and assembly; CNC machining sits inside a one-stop offering built around that core, alongside 3D printing, sheet metal and injection moulding, all with instant online quoting. If your machined part travels with a board order — an enclosure, a bracket, a heat sink — putting both on one account removes a supplier, a shipment and a coordination step, and that is a real saving. The trade-off is the usual one: a one-stop vendor optimises for breadth across processes, a specialist optimises for the difficult cases inside one process. Decide by asking which description fits the part you are actually buying.

Ask where the difficulty lives. If the machined part is an accessory to an electronics order and is geometrically straightforward — a flat plate, a simple bracket, a box with holes — the one-stop route is efficient and the combined shipment is worth real money. If the machining is the hard part of the job — tolerances that stack across faces, thin walls that distort as stock comes off, compound-angle features, a finish that has to hold on a sealing or datum face — then what you are buying is engineering attention before the part is cut, and that is what a machining specialist is organised around. A practical test: could a supplier quote your part correctly without a human looking at the drawing? If yes, either vendor works and you should take the convenience. If no, buy the review.

A STEP file plus a dimensioned drawing — and the drawing is the part that makes quotes comparable. Spell out material and temper (6061-T651, not "aluminium"); give one datum scheme; mark which tolerances are functional and which are stock; call out surface finish with the masking you need; state edge-break and thread requirements; give quantity and whether it repeats; and list the documentation you need — inspection report, material certificate, certificate of conformity, first article. Without that you are not comparing two prices for one part, you are comparing two interpretations, and the cheaper quote is usually the one that assumed less. Send identical packages to both; whatever difference survives is the real one.

No, and splitting is often the cheaper answer. Keep the boards and the geometrically simple mechanical parts where the boards are made — that is exactly where one-stop convenience pays. Send the part whose tolerances, wall thickness or documentation would cause a problem to a shop organised around machining. The coordination cost of two suppliers is a few emails and one extra shipment; the cost of a precision part that arrives unusable is the part, the re-run and the schedule. Split on where the risk sits, not on a policy of single-sourcing everything.

Ask any vendor the same four questions in writing, before the order: will I receive a material certificate traceable to the heat or lot; will I receive a dimensional inspection report against my drawing, and on how many pieces; can I get a certificate of conformity; and is a first article inspection available on the first run. For a hobby build or an internal prototype none of this matters and paying for it is waste. For anything going into a regulated, funded or safety-relevant programme it is not paperwork — it is the difference between a part you can use and a part you cannot. Ask before you compare prices, because these items move the price legitimately and a quote without them is not the same product.