LESU · Precision CNC Machining

Precision CNC Machining

CNC machining center

LESU delivers prototype-to-volume CNC parts with locked processes and consistent batch quality — built for global B2B supply chains that demand tight tolerances.

Controlled tolerance down to ±0.01 mm

Why LESU

Four Reasons Teams Choose LESU

From first article to full volume, the same disciplined process keeps your parts consistent.

⚙

Volume-Stable Production

Locked routing and dedicated machines hold batch-to-batch consistency from prototype into mass production.

±

Tight Tolerance Control

Machined to ±0.01 mm with standardized setups that remove variance between runs.

✓

Multi-Layer Inspection

FAI, dimensional and visual checks verify critical features on every batch before shipment.

🔒

Drawing NDA & Confidentiality

LESU signs NDAs on request and restricts file access to the project team — your designs stay yours.

Capabilities

Three Core CNC Processes

Matched processes for the geometry, tolerance and volume your part requires.

CNC Milling 3 & 4-Axis

CNC Milling

Complex geometries, pockets, threads and flat features in metals and plastics with high repeatability.

CNC Turning Swiss-Type Lathe

CNC Turning

Precision round and cylindrical parts with excellent finish and tight diameter control at volume.

5-Axis CNC Simultaneous 5-Axis

5-Axis CNC

Single-setup machining of undercuts and multi-sided contours — fewer fixtures, higher accuracy.

Materials

Metals & Engineering Plastics

A focused range of production-grade stock for functional, end-use parts.

Aluminum  6061, 6082, 7075 — light, corrosion-resistant, easy to finish
Stainless Steel  303, 304, 316, 17-4PH — strength and corrosion resistance
Titanium Alloy  Grade 5 (Ti-6Al-4V) — high strength-to-weight, medical & aerospace
Engineering Plastics  POM, PEEK, Nylon, ABS — lightweight, insulating, wear-resistant

Surface Finishing

Finishing That Fits the Function

Cosmetic and protective finishes available on machined parts — neutral tones only.

Anodizing  阳极氧化 — clear / black / natural corrosion resistance
Bead Blasting  喷砂 — uniform matte satin texture
Polishing  抛光 — mirror / high-gloss surface
Electroplating  电镀 — nickel / clear for hardness
Black Oxide  发黑 — durable dark protective layer
Brushing  拉丝 — directional grain, refined look
Passivation  钝化 — enhances stainless corrosion resistance
Powder Coating  粉末涂装 — black / grey durable layer

How it works

A Predictable Path to Production

One workflow from your CAD file to delivered parts.

Upload CAD

Securely submit 2D/3D drawings and specs.

DFM Engineering Review

We analyze manufacturability and flag risks.

Formal Quotation

Transparent pricing, typically within 7–10 working days.

Prototyping Validation

Fast first articles to verify fit and function.

Mass Production Delivery

Scaled volume with stable, audited quality.

Quality Assurance

Inspection You Can Audit

Documentation-ready QC that supports OEM incoming inspection and PPAP.

CMM inspection
CMM

CMM 三坐标测量

Coordinate-measuring machine verifies critical dimensions against your 3D model.

Deliverable: CMM inspection report

◎

AOI 视觉检测

Automated optical inspection confirms critical features and surface defects at scale.

Deliverable: AOI inspection record

⛬

FAI / PPAP / RoHS 材质报告

First-article, production part approval and material compliance documents available on request.

Deliverable: FAI · PPAP · RoHS / MTC

Industries Served

Precision Parts for Demanding Sectors

Experience across high-requirement manufacturing where tolerance and reliability matter.

Automotive

Automotive

Brackets, housings and drivetrain components with controlled batch consistency.

Medical Devices

Medical Devices

Surgical-grade and biocompatible parts machined to strict tolerances.

5G Communication

5G Communication

RF cavities, waveguides and connector bodies for communication hardware.

Consumer Electronics

Consumer Electronics

Enclosures, connectors and micro-components with clean finishes.

FAQ

CNC Machining Questions

What certifications does LESU hold?

LESU operates under a general quality-management system for precision machining. Specific certifications (e.g. ISO 9001 / IATF 16949) will be listed here once verified — placeholder for ISO 9001. Documentation is provided per project on request.

What tolerances can LESU hold?

We routinely machine to ±0.01 mm on critical features. General tolerances follow ISO 2768; tighter limits are quoted per feature from your drawing.

How are my drawings kept confidential?

All drawings are treated as confidential. LESU signs NDAs on request, restricts file access to the project team, and never reuses or discloses customer designs. Files are stored securely and removed on request.

What is the typical lead time?

Quotes are usually returned within 7–10 working days after DFM review. Prototyping and mass-production lead times are confirmed per order based on material, complexity and quantity.

What is your minimum order quantity (MOQ)?

The recommended minimum is 50 pcs; single-piece prototypes are available for validation before scaling to volume.

Which drawing formats do you accept?

We accept STEP (.step), IGES (.igs), STL (.stl), PDF and DWG (.dwg). A 3D STEP or IGES is preferred for accurate DFM and quoting; a 2D PDF/DWG is needed for toleranced dimensions.

What quality certificates can I get?

On request we supply CMM reports, FAI / FAIR, Mill Test Certificates (MTC), RoHS documentation and PPAP submissions based on project requirements.

Get a Quote

Request Your CNC Quote

Upload your CAD files and project details — LESU returns a DFM review and quote.

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        <div><b style="font-size:15px;">Click to upload CAD files</b></div>
        <div class="cnc-fhint">Accepted: .step · .igs · .stl · .pdf · .dwg &nbsp;|&nbsp; multiple files supported</div>
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      Prefer email? Reach LESU at <b>lesu66@foxmail.com</b> · WhatsApp <b>+44 07885715366</b> · <b>cnc.lesu66.com</b>
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