10 Questions to Ask Before Sending a Drawing to a Chinese Supplier Drawings are the most valuable documents an engineering team owns. Before one leaves your inbox, ten minutes of questions will tell you more about a supplier than any website or certificate. Ask all ten; the answers cost nothing and the wrong supplier costs…
One Supplier or Five? The Hidden Cost of Splitting a Drawing A housing needs milling, turning, heat treatment, and black anodizing. The straightforward way to buy it: find a milling shop, a turning shop, a heat treater, and an anodizer, and manage four purchase orders. Each supplier is a specialist, each quote is individually competitive,…
How to Read a CNC Inspection Report: What Buyers Should Check Most CNC shipments now include an inspection report, and most buyers file it away without reading it. That is a missed opportunity — the report is the single best window into how a supplier actually runs production. A good one tells you the parts…
7 RFQ Mistakes That Delay Your Order and Raise the Price A CNC quotation is only as good as the information behind it. When a quote comes back late, vague, or unexpectedly expensive, the cause is usually not the supplier’s margin — it is something missing or over-specified in the RFQ itself. These seven mistakes…
Why CNC Parts Pass Inspection but Still Fail at Assembly Every buyer has seen this at least once. The shipment arrives, the inspection report inside shows every dimension within tolerance, and two days later the parts will not go together on the assembly line. Nobody machined anything wrong, nobody measured anything wrong, and yet the…
Most of a machined part’s cost is fixed before the quote is written. Once the drawing is frozen and the process is planned, the only remaining lever is negotiation — and that moves the number by a few percent at best. The real savings sit upstream, in decisions that take minutes to change on a…
Both 6061 and 7075 are precipitation-hardened aluminum alloys, and both appear in machined components every day. The choice is rarely about which one is “better.” It is about which one matches the load path, the environment, and the manufacturing process. Specifying 7075 where 6061 would work adds material cost, machining time, and distortion risk. Specifying…
Buyers often send a drawing marked ±0.01 mm on every dimension and expect it to be routine. Sometimes it is. Often it is not — and the difference has little to do with whether the shop owns a “precision” machine. Tolerance capability is not a single number. It is the result of the machine, the…