CNC Prototypes Import Guide for Medical Device Companies: the 2026 production season Guide No.382

Procurement teams in South Korea increasingly treat CNC prototypes as a strategic buy rather than a spot purchase, so supplier readiness matters more than the last percentage point of price. The notes below work as a checklist for Medical Device Companies that need a part which meets the drawing and still hits the target cost.

Material Selection

Cheap substitutes usually appear in the material grade and the finishing step, so inspect those areas first. Material typically accounts for more than half of the part price, so a small grade change moves the quotation a long way. For CNC prototypes, the process matters as much as the material: watch the setup strategy and tool selection. State the material standard, the temper condition and the traceability requirement by number, not by adjective.

From the Machine Shop to Your Dock

Insist on moisture protection and, where required, vacuum packing, because damp cartons are a common cause of claims. Rust prevention is the detail that decides whether a shipment arrives usable, especially for ferrous parts on a humid route. Plan the sailing, not the shipping date: the production calendar should work backwards from the arrival window. Cartons for CNC prototypes should be specified with the board grade, the internal packing method and a drop-test requirement.

Where the Price Actually Comes From

Watch the metal index and the energy surcharge, because both move the cost of CNC prototypes during a long programme. Ask what the price would be at double the quantity; the answer shows you how much of the quotation is fixed cost. Most quotation gaps come from a different material grade, a different finishing route or a different inspection level, not from shop margin. Payment terms are part of the price: a discount paid for with a larger deposit is not a discount.

Inspection That Prevents Rejects

Agree in writing what happens when a lot fails, including who pays for sorting, rework and the return freight. Track the reject rate by characteristic rather than only in total, so you can see whether the process is drifting. Keep a golden sample sealed at the supplier and a matching reference in your own store.

Finding a Reliable Machine Shop

A supplier that can show recent CNC prototypes inspection reports is a safer partner than one that only shows photographs of finished parts. Request the process plan and the inspection plan before you pay the deposit, so you can see how the part will be made and measured. Confirm who owns the drawings, the fixtures and the part programme, especially if you may move the part to another supplier later.

Process Capability and Tolerances

Tolerance is a cost driver, so release only the tolerances the function demands rather than the tightest number that fits on the drawing. Discuss deburring explicitly, since unstated edge requirements are the most common cause of disputes on machined parts. Ask the shop to state the process capability it will hold, and to report actual measurements rather than a pass or fail.

Final Checklist

Revision frozen, first article approved, inspection plan agreed, packing confirmed, documents ready. Tick these five boxes and your CNC prototypes order will most likely arrive as planned.