DOMS — Precision CNC Machined Components
Aluminum & steel CNC turning and milling — matched to an audited Vietnam factory with CMM inspection capability
About DOMS
DOMS is a U.S.-based industrial manufacturing company sourcing custom precision CNC machined components. Led by President Greg L. Wilhite, DOMS required a reliable manufacturing partner that could hold tight tolerances on a family of aluminum and steel parts — with full CMM inspection documentation and a clear quality audit trail. After our team matched them with an audited Vietnam factory, Greg shared this feedback:
"You and the Dewin team are very thoughtful!! It is a joy to do business with you."
— Greg L. Wilhite, President, DOMS
The Sourcing Challenge
DOMS needed a Vietnam CNC machining partner capable of handling a mixed component family: precision-turned aluminum shafts, milled steel housings, and drilled stainless flanges — all with tight dimensional tolerances (±0.01 mm on critical features) and controlled surface finishes (Ra 1.6 μm on sealing faces).
For a U.S. buyer, the critical question is always: "How do I know the factory is actually capable before I commit tooling and production investment?" That's exactly what our Dolphin Audit process answers — with a scored, documented factory assessment before any purchase order is placed.
How DEWIN Vietnam Helped — 6-Step Process
Our Vietnam engineering team reviewed the full drawing package and identified tolerance class, material, surface treatment, and inspection documentation requirements.
We shortlisted 3 CNC machining factories from our audited network with verified CMM capability, hard anodize lines, and ISO 9001:2015 certification.
Our team conducted a full 50-point Dolphin audit at the selected factory — covering equipment, QC systems, certifications, and traceability. Score: 85/100.
We managed sample production and conducted our own on-site FAI — CMM balloon report, profilometer surface finish check, anodize thickness verification — before shipping to DOMS.
DOMS approved all components on first submission — 5 weeks from project kick-off, no rework, all critical dimensions within tolerance.
Pre-shipment inspection (AQL 2.5, Level II) on every batch. COO documentation for Vietnam-origin goods. Monthly factory visits by our team.
What the Dolphin Audit Found
Our 50-point Dolphin audit gave DOMS a clear, scored picture of the factory's real capabilities before they committed any tooling investment. Here's what was verified on-site:
| Audit Pillar | What We Checked | Finding |
|---|---|---|
| Equipment & Process | CNC turning centers, milling machines, axis count, tooling system | ✓ Pass — Mazak + Haas, 6-axis capable |
| Inspection Equipment | CMM make/model, calibration cert, profilometer, gauging | ✓ Pass — Mitutoyo Crysta-Apex CMM |
| Quality System | ISO 9001:2015 cert (on-site), procedure docs, NCR system, corrective action | ✓ Pass — ISO cert verified on-site |
| Documentation | Mill certs, CoC, FAI capability, PPAP Level 2 readiness | ✓ Pass — PPAP Level 2 capable |
| Logistics & Lead Time | Production capacity, scheduling, MOQ, typical lead times | ✓ Pass — 4-week standard lead time |
Dolphin Audit: 50-point, 5-pillar on-site scoring system used by DEWIN Vietnam for all factory qualifications. Full audit report shared with buyer before commitment.
Why CMM Inspection Matters for Precision Components
For components requiring ±0.01 mm tolerances, hand gauging with calipers simply cannot provide the measurement traceability or accuracy that precision industrial buyers require. A factory with a calibrated CMM (Coordinate Measuring Machine) can:
- • Generate a full balloon-dimensioned FAI report mapped to your drawing
- • Provide GD&T callout verification (true position, flatness, cylindricity, runout)
- • Support PPAP Level 2/3 documentation requirements for industrial customers
- • Demonstrate Cpk process capability data for critical dimensions
Only a fraction of Vietnam's CNC machining factories in our audited network have in-house CMM capability. We specifically filter for this during factory matching when your application requires FAI documentation or tight tolerance verification.
Vietnam's FTA Advantage
Vietnam-origin goods benefit from 16+ Free Trade Agreements — meaning DOMS's components don't just avoid U.S. Section 301 tariffs; they can also qualify for preferential rates into EU, CPTPP, RCEP, and UKVFTA markets.
11 countries — Japan, Australia, Canada, Mexico + more
EU–Vietnam — 27 EU member states
15 Asia-Pacific nations — world's largest FTA by GDP
UK–Vietnam bilateral trade agreement
Results Summary
"You and the Dewin team are very thoughtful!! It is a joy to do business with you."
— Greg L. Wilhite, President, DOMS