We Don't Just Make Parts. We Solve Problems.
LOM Metal Machining is a precision CNC manufacturer headquartered in China's Greater Bay Area -- one of the world's most advanced manufacturing corridors. For over 20 years, we've served engineers, procurement teams, and founders across North America, Europe, and Asia-Pacific who need parts made right the first time.
We're not a broker. We own 600+ machines, operate a 50,000 m² facility, and employ 80+ DFM engineers who review every project before a single chip is cut. When you work with LOM, you're talking directly to the people running the machines.
Strategically Located in the Greater Bay Area
Direct access to Shenzhen/Guangzhou ports means faster shipping to Los Angeles, Hamburg, and Tokyo. Most US/EU orders arrive within 7-14 days door-to-door. We handle customs documentation in-house.
"When I started LOM over two decades ago, I kept hearing the same frustration from engineers in the US and Europe: 'We found a cheap supplier, but the parts were wrong, the communication was terrible, and we lost six weeks.'"
That's the problem we set out to fix. Not by promising the lowest price -- but by building a factory that thinks like an engineering team. Today we have 80+ DFM engineers who review every drawing before production. We own our anodizing lines so we don't outsource and lose control. We've invested over $60 million in machines because cutting corners on equipment means cutting corners on your parts.
Our clients range from a medical device startup in Boston shipping us their first 50-piece prototype order, to a Tier 1 automotive supplier in Stuttgart running 500,000-piece annual programs. Both get the same engineering attention. Both get the same quality documentation. That's not marketing copy -- it's how we've kept 800+ clients for 20+ years.
If you're evaluating us as a supplier, I'd encourage you to ask the hard questions. We welcome them.
20+ Years
Built to Last
We didn't grow by accident. Every milestone reflects a deliberate investment in capability, quality, and long-term client relationships.
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2003
Founded in the Pearl River Delta
Started with a small team of machinists and 20 CNC machines in Guangdong Province. First clients were local electronics manufacturers needing tight-tolerance aluminum housings.
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2008
First International Clients -- US & Germany
Expanded to serve North American and European OEMs. Invested in Swiss-type turning machines (Citizen, Tsugami) to meet the micro-precision demands of optical and medical customers.
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2012
ISO 9001 Certification & New Facility
Achieved ISO 9001 certification and moved into a purpose-built 20,000 m² facility. Formalized the IQC→IPQC→FQC→OQC quality traceability system that we still run today.
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2016
IATF 16949 -- Automotive Grade
Achieved IATF 16949:2016 certification, opening the door to Tier 1 and Tier 2 automotive suppliers in Germany, Japan, and the US. Added PPAP Level 3 documentation capability.
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2019
ISO 13485 Medical & In-House Finishing Lines
Earned ISO 13485 for medical device manufacturing. Opened self-owned Type II/III anodizing lines and copper blackening lines -- eliminating outsourcing for surface finishing entirely.
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Today
50,000 m² · 600+ Machines · 800+ Clients
Operating from a 50,000+ m² facility in the Greater Bay Area. $60M+ in assets, 450+ CNC machines from Mazak, Citizen & Tsugami. Serving customers across 30+ countries with 10+ years of international logistics experience.
ISO 9001 IATF 16949 ISO 13485 ISO 14001
CNC Milling
& CNC Turning
Two core disciplines. One facility. 450+ machines running 24/7 with full DFM engineering support on every order.
CNC Milling
Our milling department runs 100+ units including 3-axis, 4-axis, and full 5-axis machining centers from Mazak and Brother. We handle everything from simple prismatic parts to complex multi-surface aerospace components -- in aluminum, steel, titanium, and engineering plastics.
CNC Turning & Swiss Machining
With 350+ Swiss-type CNC turning machines (Citizen, Tsugami), this is where LOM stands apart. Swiss machining excels at small-diameter, high-precision turned parts -- the kind of components that show up in camera lenses, surgical instruments, and 5G connectors. If your part has a length-to-diameter ratio above 3:1, Swiss turning is likely the right process.
Machines & Quality
Control
We've heard the line "we have strict quality control" from every supplier. Here's what ours actually looks like -- specific machines, specific inspection tools, specific processes.
Production Equipment
Why machine brand matters: Citizen and Tsugami Swiss machines hold tighter thermal stability than generic alternatives, which directly impacts dimensional consistency across large production runs. Our Mazak machining centers use Mazatrol CNC control -- reducing setup error and enabling faster changeover between jobs.
Quality Control System
All inspection reports, material certifications, and dimensional reports are provided with every shipment -- no extra charge, no request needed. We know your incoming QC team needs the paperwork before they can accept the parts.
Our
Certifications
Certifications aren't marketing -- they're annual third-party audits that require us to prove our processes work. Here's what we hold and why it matters to your supply chain.
The baseline for any serious manufacturer. Covers document control, corrective action, and continuous improvement. Required by most enterprise procurement policies before a supplier can be approved.
The automotive industry's quality standard -- required by BMW, Ford, GM, Toyota supply chains. Covers APQP, PPAP, FMEA, and SPC. If your parts go into a vehicle, this certification is non-negotiable.
Medical device quality management -- required for surgical instruments, implant components, and diagnostic equipment parts. Covers sterile packaging, traceability, and risk management per ISO 14971.
Environmental management system certification. Increasingly required by European customers for ESG compliance reporting. Covers waste reduction, coolant disposal, and energy management across our facility.
All four certifications are maintained through annual surveillance audits by accredited third-party bodies. We can provide current certificates, audit reports, and corrective action histories during supplier qualification. Contact us to request our full supplier qualification package.
We sign mutual NDAs before reviewing any drawings. All engineering files are stored on isolated servers with role-based access. We do not share customer designs or use them for competing orders -- a clause that's part of our standard contract.
What We Work
With
Material selection and surface finishing affect cost, lead time, and performance equally. Our engineering team reviews every order for DFM -- if you've over-specified a tolerance or chosen a finish that adds 3 weeks, we'll tell you.
Materials
Surface Finishing
In-house anodizing & copper blackening lines -- no outsourcing, no delays.
Tolerance Guide
DFM Note: Tighter tolerances increase cost and lead time non-linearly. A ±0.005mm tolerance on a non-critical feature can add 40-60% to part cost. Our engineers flag these during DFM review -- free of charge.
Client Work
& Case Studies
View All Case Studies
Camera Lens Barrel Assembly
A US-based camera manufacturer needed 50,000 aluminum lens barrel components per month with ±0.008mm thread tolerances. Previous supplier had a 12% rejection rate. LOM's Swiss turning team achieved 0.3% rejection over 18 months.
Surgical Instrument Housings
A German medical device startup needed 316L stainless steel instrument housings with ASTM A967 passivation and full ISO 13485 documentation. First article approval achieved in 9 business days from drawing submission.
EV Battery Management Housings
A US EV startup needed IATF 16949 compliant aluminum BMS housings with Type III hard anodizing. LOM managed the full PPAP Level 3 package, enabling the customer to pass Tier 1 supplier qualification in 6 weeks.
Let's Talk
About Your
Next Project
Whether you're a startup prototyping your first hardware product or a procurement manager qualifying a new CNC supplier -- we respond to every inquiry with a real engineer, not an automated form response.