CNC Milling

Our 3-axis and 3+2-axis CNC milling machines produce complex prismatic parts — housings, brackets, heat sinks, fixturing and optical/aluminum panels — from aluminum, steel, stainless and engineering plastics. We hold ±0.005 mm on pocket depth and position, and run both prototype batches and production runs up to 50,000 pcs.

CNC milling aluminum housing on vertical machining center

What We Mill Most

  • Audio interface panels & faceplates — 6063 anodized aluminum, sharp corners, silk-screened or laser-etched legends.
  • Electronics housings & enclosures — EMI shielding pockets, connector cutouts, heat-sink fins.
  • Heat sinks & thermal parts — thin fins down to 0.5 mm pitch, vacuum-brazed or bolted assemblies.
  • Fixturing & jigs — production tooling, inspection gauges, low-volume production parts.

CNC Milling Capabilities

Parameter Capability
Work envelope up to 1000 × 500 × 300 mm
Position tolerance ±0.005 mm (3-axis), ±0.005 mm typical
Min wall thickness 0.5 mm (aluminum), 1.0 mm (steel)
Min hole diameter Ø0.5 mm (drilled), EDM for smaller
Spindle speed up to 15,000 rpm
Materials Aluminum 6061/6063/7075, steel 1045/4140, stainless 304/316, brass, copper, POM, PEEK, acrylic

Industries We Serve

Audio & electroacoustic, 3C electronics, automotive, LED thermal management, optical and test equipment.

What We Machine With This Process

Real components shipped to overseas buyers — not generic stock photos.

Aluminum Panels & Faceplates

Aluminum Panels & Faceplates

6061-T6 milled, anodized. Audio faceplates, mixer panels, control surfaces.

Heat Sinks & Thermal Plates

Heat Sinks & Thermal Plates

Extruded 6063, fly-cut bases, taped holes. Custom fin density.

Enclosures & Housings

Enclosures & Housings

Pocketed, threaded and sealed. Aluminum electronic enclosures and chassis.

Speaker & Device Housings

Speaker & Device Housings

Internal pockets, port tubes, driver mounts. CNC-ported speaker cabinets.

3C Electronics Brackets

3C Electronics Brackets

Phone, camera and wearables. Precision brackets, frames and shield cans.

Manifolds & Fluid Blocks

Manifolds & Fluid Blocks

Cross-drilled and ported. Hydraulic manifolds, cooling plates, valve bodies.

Why Buyers Choose Rejin CNC for This Process

Six reasons engineering teams send us drawings instead of another quote request.

±0.005

Micron-Level Tolerance

Hold ±0.005 mm on critical features with in-process probing and CMM first-article reports on every batch.

24h

Quote & DFM in 24 Hours

A senior engineer reviews your drawing — not a sales rep. We flag tolerance, undercut and cost drivers before quoting.

3-7d

Fast Prototype Delivery

1–10 piece prototypes ship in 3–7 days. Rush 24-hour service available for urgent development cycles.

200+

In-House Capacity

200+ CNC mills, lathes and 5-axis machines under one roof. No subcontracting — we control quality and lead time.

60+

Countries Served

Door-to-door DHL/FedEx or sea freight. Full tracking, customs handled, FBA-ready packaging on request.

NDA

Your Drawings Are Safe

Standard NDA before quoting. Files stored on encrypted internal servers, never shared or reused.

QUALITY CONTROL SYSTEM

Precision Inspection In Every Production Stage

CMM 3D precision inspection

01 CMM 3D Precision Inspection

Verify critical dimensions, hole positions and complex GD&T geometric tolerances via professional CMM equipment. Full 3D scanning avoids assembly defects for complex machined components.

In-process dimensional verification

02 In-process Dimensional Verification

Continuous in-process dimensional testing with precision measuring tools. Early defect identification minimizes scrap risk during mass OEM production.

Surface finish and visual inspection

03 Surface Finish & Visual Inspection

Strict inspection on surface finish, scratches, burrs and coating defects. Meet strict appearance requirements of aluminum alloy housings.

First Article Inspection

04 First Article Inspection (FAI)

Standardized first article inspection before mass production. Deliver formal FAI reports to stabilize dimensional consistency for bulk orders.

Raw material traceability

05 Raw Material Traceability Management

Complete material certification & batch records. All machined parts can trace back to raw material source for IATF 16949 automotive compliance.

Final functional performance check

06 Final Functional Performance Checks

Comprehensive final functional inspections to identify hidden defects that dimension testing cannot catch, guarantee stable part performance.

Salt spray corrosion test on CNC machined parts

07 Salt Spray Corrosion Test

Neutral salt spray chamber evaluates anti-corrosion performance of anodized, plated and coated CNC parts, verifying long-term outdoor and humid-environment durability to ASTM B117 standards.

Aging and pressure durability test equipment

08 Aging & Pressure Durability Test

Simulate real-world working conditions — temperature cycling, vibration and repeated load — to verify long-term mechanical reliability and prevent premature field failure of precision machined components.

Quality, Engineering & Logistics — Built for Global Buyers

IATF 16949 and ISO 9001 certified CNC machine shop

IATF 16949 & ISO 9001 Certified

Fully certified quality management system. Every batch ships with material certificates and inspection reports you can trust.

DFM engineering team reviewing CAD drawings

Free DFM Engineering Support

Our engineers review every drawing upfront — flagging tolerances, undercuts and cost drivers before a single chip is cut.

Secure packaging and global shipping for CNC parts

Secure Packaging & Global Shipping

Custom foam, wooden crates and FBA-ready packaging. Door-to-door freight to 60+ countries with full tracking.

SIMPLE PROCESS

What Happens After You Click Send?

1
Inquiry Received

Your message lands directly with our senior engineers — instantly acknowledged.

2
Engineer Review

We study your requirements and propose a workable solution with material & process options.

3
Quote Within 24h

Detailed quotation with specs, options and lead time — no hidden fees.

4
Sample & Production

Approve the sample, then we mass-produce with full QC and on-time shipping.

WhatsApp: +86 13790500374

Email: info@rejincnc.com

Request a Quote

Custom Quote Within 24 Hours

    Full Name *

    Business Email *

    Phone / WhatsApp *

    Company Name

    Upload Drawing / Sketch (Optional)

    No file selected

    Project Details

    Your CAD files are kept strictly confidential. Quotation within 24 hours.