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China's Precision Manufacturing Partner

Premier CNC Machining
Services in China
for Global Industries

ISO 9001 Certified  ·  3-Day Prototyping  ·  On-Demand Manufacturing from 1 to 10,000+ parts.

ISO 9001 · IATF 16949
±0.005mm Tolerance
600+ CNC Units
800+ Global Clients
Get Instant Quote View Capabilities
Get a 4-Hour Quote
No MOQ · NDA Available · DFM Review Included

Response < 4 hrs · 800+ clients served

Our Products

Precision
Machining Services

Two decades of manufacturing excellence -- delivering ±0.005mm precision from prototype to full-scale production.

CNC Milling Service -- multi-axis precision milling at LOM Metal Machining
CNC Milling
3-Axis 4-Axis 5-Axis

CNC Milling Service

From complex 3-axis profiles to demanding 5-axis simultaneous cuts, our 100+ milling units deliver tight-tolerance parts across aluminum, stainless steel, titanium, and engineering plastics. Backed by 80+ DFM engineers, we optimize your design for machinability -- reducing cost without compromising precision.

  • Tolerance capability down to ±0.005mm
  • 100+ units -- Mazak, Brother, and Fanuc-controlled centers
  • Prototypes to 1,000,000+ volume production runs
  • Industries: Aerospace, Medical, Robotics, Optical, Automotive
Get a Milling Quote View CNC Milling Service
CNC Turning Service -- Swiss-type precision turning at LOM Metal Machining
CNC Turning
Swiss-Type Ø0.5-32mm

CNC Turning Service

With 350+ Swiss-type turning units from Citizen and Tsugami, we specialize in high-volume, micro-precision turned components down to Ø0.5mm. Ideal for medical, optical, and electronic applications demanding extreme dimensional consistency, our turning department handles everything from simple shafts to complex multi-feature parts in a single setup.

  • Diameter range: Ø0.5mm - 32mm
  • 350+ Swiss-type units -- Citizen, Tsugami precision lathes
  • Ideal for medical, optical and micro-precision components
  • ISO 13485 & IATF 16949 compliant production processes
Get a Turning Quote CNC Turning Service
Tolerance Comparison

Standard vs Precision

A compact reference for common CNC machining tolerance levels. Final tolerance depends on material, geometry, feature size, surface finish, and inspection method.

Compact tolerance comparison table for standard CNC machining and precision CNC machining
Feature Standard Precision
Linear ±0.05mm ±0.005mm
Angular ±0.5° ±0.05°
Holes ±0.05mm ±0.005mm
Roughness Ra 3.2μm Ra 0.4μm
ISO Fit IT9-IT11 IT4-IT6

Use this as an early design reference before final DFM review.

View More Details
Precision CNC machined metal component under inspection for tight tolerance control
Controlled machining · verified inspection
Machining Difficulty

Tight Tolerance Needs Process Control

Moving from ±0.05mm to ±0.005mm requires more than a toolpath change. LOM controls fixture stability, cutting parameters, tool wear, material verification, and CMM inspection to keep critical dimensions repeatable.

±0.005
mm Capability
20+
Inspection Tools
80+
DFM Engineers

Unsure which features need tight tolerance? Send drawings for a DFM tolerance review.

Get Tolerance Review Read Details
Materials

Machining Materials
We Work With

From standard metals to high-performance exotic alloys and engineering plastics, we source premium materials with full traceability to meet your exact application needs. .

CNC machined aluminum material sample
Metal Material

Aluminum

Lightweight, highly machinable, and finish-friendly, aluminum is ideal for precision housings, brackets, heat sinks, optical components, robotics parts, and aerospace structures. LOM machines 6061-T6 for general applications and 7075-T6 where higher strength is required.

6061-T6 · General purpose 7075-T6 · Aerospace grade 2024 · High fatigue resistance 5052 · Marine and formed parts
Anodizing Hard Anodize Bead Blast Powder Coat
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Material Selection Support

Need Help Choosing A Material?

Upload your drawing and our DFM engineers will recommend the right material for tolerance, strength, finishing, cost, and lead time.

Request A Material Quote Download Materials PDF

Free consultation · NDA available · 4-hour engineering quote

In-House Capabilities

Surface
Finishing

20+ in-house finishing options -- self-owned anodizing and copper blackening lines eliminate outsourcing delays and ensure complete quality traceability on every order.

Anodized aluminum CNC parts showing Type II and Type III hard coat finishes

Anodizing

01

Self-owned Type II and Type III hard anodizing lines for aluminum alloys. Delivers superior corrosion resistance, wear hardness up to 70 HRC equivalent, and precise dimensional control -- with in-house color dyeing in clear, black, red, blue, and custom shades.

Type II Type III Hard Coat Color Dyeing
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Brushed finish CNC machined metal components with linear surface texture

Brushing

02

Controlled metal brushing process for aluminum, stainless steel, brass, and copper components. Creates a consistent directional grain, reduces minor surface marks, and delivers a premium satin appearance for housings, panels, optical hardware, and precision machined visible parts.

Linear Grain Satin Finish Visible Parts
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Powder coated precision machined parts with uniform matte and gloss finishes

Bread blasting

03

Precision sandblasting and bead blasting for aluminum, stainless steel, titanium, brass, and engineered metal parts requiring uniform matte textures, surface cleaning, and pre-treatment before anodizing or coating. Ideal for optical components, housings, fixtures, and precision machined parts.

Bead Blasting Matte Finish Surface Prep
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Bead blasted CNC machined aluminum parts with uniform matte satin surface texture

Passivation Treatment

04

Stainless steel passivation removes free iron and surface contaminants to enhance corrosion resistance and stabilize the protective oxide layer. Ideal for medical, aerospace, food-grade, and precision components requiring clean, durable, and specification-controlled surfaces.

Stainless Steel Corrosion Resistance Medical Grade
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Black oxide copper blackened precision components for optical and electronics applications

Black Oxide

05

Proprietary self-owned black oxide line produces deep matte-black surfaces on copper, brass, and steel components. Minimal dimensional change -- critical for optical assemblies, camera modules, precision hardware, and electronic connectors where stray light suppression and tight tolerances must coexist.

Self-Owned Line Optical Grade Minimal Dim. Change
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Electroplated nickel and zinc precision machined parts with bright metallic finish

Electroplating

06

Nickel, zinc, chrome, and gold electroplating for enhanced conductivity, wear resistance, and corrosion protection. Widely used in automotive connectors, electronic contacts, and defense hardware -- with full RoHS compliance and PPAP Level 3 documentation available.

Nickel / Zinc RoHS Compliant PPAP L3
Read More

The Right Finish, Applied In-House -- Every Time

From Type II/III hard anodizing and copper blackening to bead blasting, powder coating, passivation, and beyond -- our self-owned finishing lines deliver 20+ surface treatment options with zero outsourcing delays. Consistent quality, controlled in-house, every order.

Request a Quote Explore All Finishes
Machining Process

From CAD File to
Production-Ready Parts

A transparent CNC machining workflow built for engineering teams, procurement managers, and scaling hardware companies -- from rapid prototype validation to stable, documented mass production.

LOM Metal Machining CNC workshop with advanced machining equipment and production lines
50,000+ m² Greater Bay Area Facility

Real Machines.
Controlled Process.

600+ advanced production units, 450+ high-end CNC machines, 350+ Swiss-type turning centers, and 100+ multi-axis milling systems -- supported by in-house finishing and full quality traceability.

600+
Production Units
450+
CNC Machines
±0.005mm
Tolerance Capability
1M+
Volume Capacity
  1. 01

    DFM & Quote

    Upload CAD drawings for engineering review, tolerance advice, material recommendations, and quote feedback.

  2. 02

    Material IQC

    Incoming aluminum, stainless steel, titanium, copper, and plastics are verified with certificates and XRF checks.

  3. 03

    CAM Setup

    Tooling, fixtures, machining strategy, and first article parameters are prepared for stable output.

  4. 04

    CNC Machining

    Swiss turning, 3/4/5-axis milling, EDM, and machining cells operate with IPQC sampling and FAI checks.

  5. 05

    Finishing

    In-house anodizing, copper blackening, passivation, bead blasting, powder coating, and 20+ finish options.

  6. 06

    Final QC & Ship

    CMM inspection, visual checks, documentation package, secure packing, customs support, and global delivery.

Choose Your Production Path

Prototype Fast.
Scale Confidently.

Whether you need one functional prototype or a qualified supplier for high-volume production, LOM supports the full lifecycle with one engineering and quality system.

Rapid CNC prototyping for precision machined metal parts
Rapid Prototyping

Fast DFM-to-Part
Prototype Builds

Validate fit, function, tolerance, and material behavior before committing to tooling or volume orders. Our engineers support CAD review, machining strategy, and finishing selection for practical, production-minded prototypes.

  • 1-piece to low-volume CNC machining with no MOQ restrictions
  • DFM review for tolerance feasibility, cost reduction, and manufacturability
  • Ideal for NPI, design validation, pilot runs, and investor demo hardware
1-Piece Start 80+ DFM Engineers Aluminum · Steel · Titanium
Start Rapid Prototype
High-volume CNC mass production line for precision metal components
Mass Production

Stable Output
For Volume Orders

Scale from approved prototype to 1,000,000+ parts with dedicated machining capacity, in-house finishing, documented inspection plans, and complete traceability for automotive, medical, optical, aerospace, and electronics programs.

  • 450+ high-end CNC machines from Citizen, Tsugami, Mazak, and Brother
  • ISO 9001, IATF 16949, ISO 13485, and PPAP Level 3 support
  • Self-owned anodizing, copper blackening, and 20+ finishing options
1,000,000+ Pieces IQC → IPQC → FQC → OQC Global Logistics
Plan Mass Production
CNC Machining RFQ

Ready to Move Your Project from Sample to Production?

Upload your drawings or project files. Our DFM engineers will review tolerance, materials, finishing, and production feasibility for a practical CNC machining quote.

4hr
Quote Review
80+
DFM Engineers
1M+
Production Scale

Accepted: STEP, IGES, DWG, DXF, PDF, ZIP, images.

Submitting...
Applications We Support

CNC Machining Solutions
for Your Industry

We manufacture custom metal and plastic parts for a wide range of industries, from prototypes to production runs.

01

Automotive Parts

CNC machined housings, brackets, sensor parts, BMS components, and chassis hardware with IATF 16949 production support.

View Related Parts
02

Automation Equipment

Precision fixtures, grippers, actuator housings, shafts, rollers, and machine modules for automated production systems.

View Related Parts
03

Industrial Machinery

Durable machined blocks, bearing seats, couplings, valve bodies, pump parts, and replacement components for heavy-duty machinery.

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04

Electronics & Connectors

Aluminum enclosures, heat sinks, RF housings, brass pins, copper contacts, and connector components with in-house finishing options.

View Related Parts
05

Medical Components

ISO 13485 supported machining for surgical tools, diagnostic device parts, implant-related components, and PEEK or 316L precision parts.

View Related Parts
06

Custom Hardware

Made-to-print fasteners, sleeves, bushings, spacers, knobs, brackets, pins, and custom mechanical hardware in metal or engineering plastic.

View Related Parts
Product Examples

Parts We Have Manufactured

Explore examples of machined components we produce for different customer requirements.

View Product Gallery
CNC machined aluminum housing made from AL6061-T6

Aluminum Housing - AL6061-T6

CNC machined stainless steel ball joint made from Stainless Steel 316L

Stainless Steel Ball Joint - Stainless Steel 316L

CNC machined stainless steel valve body made from Stainless Steel 304

Stainless Steel Valve Body - Stainless Steel 304

CNC turned stainless steel shaft made from Stainless Steel 316

Stainless Steel Shaft - Stainless Steel 316

CNC machined aluminum standoff made from AL6061

Aluminum Standoff - AL6061

CNC turned stainless steel pin made from Stainless Steel 316

Stainless Steel Pin - Stainless Steel 316

CNC machined POM spacer made from POM

POM Spacer - POM

CNC machined aluminum bracket made from Aluminum 6061

Aluminum Bracket - Aluminum 6061

CNC machined aluminum block with blue anodizing

Aluminum Block - Anodizing Blue

CNC machined brass connector made from Brass C360

Brass Connector - Brass C360

CNC machined copper terminal made from C110 Copper

Copper Terminal - C110 Copper

CNC machined titanium components made from Ti-6Al-4V

Titanium Components - Ti-6Al-4V

Custom CNC Machining Support

Looking for Custom Parts
for Your Industry?

Share your drawings, samples, or project requirements with us. Our team will help review your needs and suggest a practical machining solution.

View Product Gallery Contact Us
Customer Testimonials

Trusted by
Global Teams

Procurement leaders, engineers, and founders rely on LOM Metal Machining for precision CNC parts, clear communication, and scalable production support.

Customer avatar representing a CEO

Michael Reynolds

CEO · Robotics Startup

"LOM Metal Machining helped us move from prototype builds to repeat production without changing suppliers. Their DFM feedback reduced rework and gave our team confidence before launch."
Customer avatar representing a mechanical engineer

James Anderson

R&D Engineer · Medical Devices

"Their engineers understood the tolerance stack-up and material requirements quickly. We received practical machining recommendations, inspection reports, and stable quality across multiple batches."
Customer avatar representing a female purchasing manager

Sarah Mitchell

Procurement Manager · Automotive

"LOM Metal Machining gives our purchasing team fast quotes, reliable documentation, and consistent delivery updates. Their IATF 16949 support makes supplier qualification much easier."
Request a Quote

Send Files.
Get a Quote.

Upload CAD/drawings with quantity and material notes. Our engineers will review and respond with practical next steps.

Upload Files
Uploading your RFQ files...

NDA support available. Files are used only for quotation review.

FAQ

CNC Machining
FAQ

Common questions before starting a custom machining project.

What CNC machining services do you provide?

We provide CNC milling, turning, Swiss machining, prototyping, and production machining for precision metal and plastic components.

What materials can you machine?

We machine a wide range of materials, including aluminum alloys, stainless steel, carbon steel, brass, copper, titanium, POM, nylon, ABS, PEEK, PTFE, Ultem, and other engineering plastics. If you are not sure which material is suitable for your part, our team can help review your application requirements.

What tolerances can you achieve?

Typical machining tolerances can reach ±0.005 mm depending on the material, part geometry, and production process. For critical dimensions, please provide detailed drawings with tolerance requirements so our engineers can evaluate manufacturability before quoting.

What files should I send for a quote?

Please send 2D drawings, 3D CAD files, material, finish, quantity, and inspection notes. STEP, STP, IGES, X_T, PDF, DWG, and DXF are commonly accepted.

Do you support prototypes and production?

Yes. We support prototype machining, small-batch production, and repeat production orders. This allows customers to test part design, verify functionality, and scale production gradually based on project demand.

LOM Advantages

Why Buyers Choose LOM Metal Machining

600+ Units

450+ CNC machines.

±0.005 mm

CMM inspection.

Certified

ISO / IATF quality.

Real Projects

CNC Machining
Case Studies

Explore how we help customers from different industries manufacture precision CNC machined parts with reliable quality, tight tolerance, and stable delivery.

3D printed functional metal and polymer prototype parts for engineering validation

Precision CNC Machined Aluminum Enclosure

CNC milled aluminum enclosure for electronic equipment, featuring a deep internal pocket, precision mounting holes, clean chamfers, and a smooth burr-free surface for reliable assembly.

Deep pocket deformation control
Accurate mounting hole positions
Burr-free anodized-ready finish
Material / Process

6061-T6 aluminum · CNC milling, pocket milling, drilling, tapping, chamfering, deburring, dimensional inspection, surface finishing.

View Case Study
Custom CNC turned stainless steel shaft components for automation machinery

Stainless Steel Shaft Components

For an automation equipment customer, we machined stainless steel shafts with tight diameter control, smooth finishes, and stable concentricity to support reliable assembly and consistent batch production.

Accurate outer diameter control
Stable concentricity
Smooth surface finish
Reliable assembly quality
Material / Process

Stainless Steel 304 / 316 · CNC turning, grooving, threading, polishing, and in-process inspection.

View Case Study
Precision CNC machined aluminum electronic product housing with anodized finish

5-Axis CNC Machined Aluminum Robotic Bracket

A complex aluminum structural part with precision bores, multi-side holes, curved profiles, and lightweight cutouts, produced by 5-axis machining for stable, repeatable accuracy.

Precision bore and concentricity control
Multi-side holes machined with reduced setup error
Complex pockets and lightweight cutouts
Clean deburring for robotic assembly performance
Material / Process

Material: Aluminum 7075-T6 · Process: 5-Axis CNC Machining, Boring, Drilling, Tapping, Pocket Milling, Chamfering, Deburring, CMM Inspection.

View Case Study
Precision Machining Cases

Looking for Similar CNC Machined Parts?

Explore more precision machining cases or send us your drawings to discuss your custom project.

View More Case Studies Contact Us for a Quote
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Your Manufacturing Partner

Ready to
Build
Real Parts?

From a single prototype to one million units -- our 80+ DFM engineers are ready to review your design and return a detailed quote within 4 business hours. No MOQ. No delays. Real precision.

ISO 9001 · IATF 16949
ISO 13485 Certified
No MOQ Restrictions
Request a Free Quote Explore Capabilities
Quote Speed
4hr
Engineering quote with DFM review from 80+ engineers
Tolerance
±0.005mm
CMM-verified precision on every production order
Why LOM?
  • 600+ Production Units
    Including 450+ CNC from Mazak, Citizen & Tsugami
  • In-House Surface Finishing
    20+ options including self-owned anodizing lines
  • 1 to 1,000,000+ Pieces
    Seamless scale from NPI prototyping to mass production
  • End-to-End Logistics
    10+ years international shipping with customs clearance
Talk to an Engineer
sales@lommetalcnc.com
Greater Bay Area, China
50,000+ sqm Facility