CNC machining questions for medical and IVD parts

A complete RFQ — drawing, model, material, quantity, and the notes on the checklist — is reviewed with pricing and design-for-manufacture comments. Our stated response target is within 24 hours of that complete package. An incomplete file or a weekend moves the target.

Manufacturing lead time is separate and is written on the quotation. It depends on material availability, the number of setups, quantity, any treatment you specify, and the inspection package. Put the date you need parts on the RFQ checklist so we can tell you whether it is realistic before you order. We do not publish one lead time that covers every PEEK or metal part.

There is no strict minimum. We machine functional prototypes, commonly in the 1–10 piece range, and repeat batches that can run from pilot quantities into the thousands when the process is stable. A one-piece PEEK prototype does not carry the same unit price as a repeat stainless bracket, because the setup and the inspection are shared differently. Put both the first quantity and the expected repeat on the quote request.

Yes. If you need a non-disclosure agreement signed before we open the CAD, send it by email or WhatsApp and wait until it is in place. The model does not have to be in the first message. WhatsApp is +86 18002516846 and the engineering email is [email protected].

Send a 2D drawing (PDF) and a 3D model (STEP, STP, or IGES). Include the revision, units, material grade, quantity, critical tolerances, threads, surface texture on functional faces, and the delivery date. DWG is usable when a PDF is attached as well. The RFQ checklist is the same list the email button uses.

Metals we machine when the drawing names them include 316L and 17-4PH stainless, Ti-6Al-4V (Grade 5), aluminum 6061-T6, 7075-T6, and MIC-6, brass, oxygen-free copper, plus tool steel and high-temperature alloys specified on the print. Engineering plastics include PEEK (natural 450G and filled grades such as GF30 or CA30 when specified), PTFE, PVDF, PCTFE, PPS, PEI, POM, PP, PMMA, and polycarbonate.

The grade on the drawing is what we buy. A family name is not enough to quote cleanly. See the materials and tolerances tables and the PEEK CNC page.

For stable metal features, the range we discuss is ±0.005 mm to ±0.01 mm. That lines up with published positioning of ±0.005 mm on 5-axis milling, ±0.008 mm on 3-axis and 4-axis milling, and ±0.005 mm concentricity on turning.

For stress-relieved PEEK and similar engineering plastics, critical features are often ±0.01 mm to ±0.025 mm. The PEEK table uses ±0.025 mm as a standard band and ±0.010 mm where a feature is stable enough to review more tightly. PTFE, PVDF, and PCTFE usually start at ±0.050 mm, with selected features reviewed toward ±0.020 mm. Geometry, wall thickness, and the datum scheme decide what we will accept on your drawing. Details are on the tolerance notes.

Name the material grade, the datums, the port positions that control alignment, the thread standard and class, and the surface texture on the sealing land. Mark internal intersections that must be burr-free, and add a cleanliness note if particles matter. If the part sees a reagent, name the media so we can flag an obvious material mismatch. The chemical compatibility decision stays with you. Related process notes are on the fluid-path page and under drawing callouts.

Inspection is planned around the drawing, not around a generic sampling plan we invent. In the Shenzhen shop the equipment includes a CMM, an optical vision system, a height gauge, surface-roughness measurement, pin gauges, and thread gauges. On request, a shipment can include a material certificate, RoHS/REACH declarations, a first-article inspection, and a CMM or vision report.

Say which features are critical so the report matches your incoming inspection. Leak testing and pressure testing are not automatic. The method, the limits, and who accepts the result have to be part of the order. The equipment list is on the quality page.

PEEK and other high-performance plastics do not shed heat the way metals do, and they move when internal stress relaxes. For thin walls, deep pockets, and asymmetric shapes we rough the part, run an intermediate anneal when the geometry needs it, and then finish. Plastic work uses dedicated sharp tooling and a clean air blast or a water-based coolant so machining oil and metal fines are not carried into a fluid-path part. Sealing lands and cross-holes are deburred and checked under magnification when the drawing requires a burr-free intersection. See PEEK machining for the process steps.

No. We machine components for medical equipment, IVD analyzers, life-science instruments, and analytical systems: housings, mounts, fluid-path parts, valve details, and similar drawing-based parts. We do not build the finished instrument, fill reagents, or take over your regulatory submission.

Material suitability, biocompatibility, and any ISO 13485, FDA, or CE expectation have to be confirmed for the specific project. A machining quote is not a device approval, and this site does not claim those certifications. Scope is described on the medical and IVD pages, with anonymous examples on part examples.

Yes, when both are on drawings we can review. Plastics and metals are not cut as if they were the same job: tooling, coolant, and deburr practice are separated so a fluid-path polymer is not contaminated with metal fines. Send both drawings if they share datums or a sealing face, and say which features must match across the two parts. IVD examples are outlined under IVD CNC machining.

Machining and the inspection described on this site are done at Huafeng Technology Park, Shiyan Subdistrict, Bao'an District, Shenzhen. Shipments to North America, Europe, and Asia-Pacific go by express (DHL, FedEx, or UPS) unless you specify another route. Who arranges the commercial paperwork is confirmed with the order. The company name on the quote is Shenzhen Kangsenlong Technology Co., LTD.