Custom Precision Machining in China: tolerances, lead times, and costs

Most buyers approach Chinese sourcing backward — they look for the cheapest price first. The successful approach is to start with your end requirement and reverse-engineer the supplier search. Define your quality specifications, compliance requirements, and volume needs before contacting any factory. This shifts the conversation from 'How much?' to 'Can you meet these specifications?' which positions you as a serious buyer and attracts serious suppliers.

When we helped a German auto parts importer find a Chinese manufacturer, the key was matching their DIN standard requirements with factories that had experience exporting to Europe. We shortlisted 5 factories, conducted remote audits of 3, and visited 2. The selected supplier delivered parts at 55% of the German domestic cost while meeting all quality specifications. The savings came from process optimization, not corner-cutting.