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Precision Manufacturer · Dongguan, China · Serving US & EU

Precision Metal Parts,
Machined & Anodized
Under One Roof

CNC machining, Type II / Type III anodizing and RoHS-compliant electroplating for consumer electronics, headphones and smart home brands — one factory, one point of contact, up to 40% shorter lead times.

Tolerance to ±0.005 mm Salt spray 500 h RoHS · REACH · PFAS-free Quotes in 24 h
Upload Your Drawing → Explore Capabilities
Direct factory sales — contact Justin Liu at +86 190 9240 8380 (Call / WhatsApp)
Color ΔE ≤ 1.0Batch-to-batch anodizing
CMM VerifiedFull inspection report
CNC machined aluminum headphone ear cup housings with champagne gold anodized finish manufactured for audio brands
Headphone Ear-Cup Housing
Al 6061-T6 · CNC + Type II Anodize · ±0.005 mm
7–10 day lead time
1
Factory: machining + anodizing + plating
±0.005mm
Precision CNC tolerance
500h
Max salt-spray resistance
24h
Quote turnaround
Capabilities

Everything From Bar Stock to Finished, Coated Part

No outsourcing between machining and finishing means no color drift, no extra freight, and one team accountable for your part from first article to mass production.

CNC MACHINING Modern precision CNC machining workshop with rows of milling centers manufacturing metal parts

CNC Machining

3-, 4- and 5-axis milling and turning for aluminum, stainless steel, brass and copper. From prototypes to 100k+ volume production.

  • ±0.005 mm
  • 5-axis
  • Live tooling
  • DFM feedback
CNC Machining Services →
ANODIZING TYPE II / III Colorful anodized aluminum parts on titanium racks lifted from industrial anodizing tanks

Anodizing (Type II / III)

Decorative and hardcoat anodizing per MIL-A-8625, with tight color control for cosmetic consumer parts. Matte, gloss and dyed finishes.

  • Type II 5–25 µm
  • Type III 25–50 µm
  • ΔE ≤ 1.0
  • Custom colors
Anodizing Services →
ELECTROPLATING Automated electroplating production line with metal parts on racks in plating tanks

Electroplating

RoHS-compliant zinc, nickel and tin plating with trivalent passivation. Salt-spray resistance up to 500 hours verified in-house.

  • Zn / Ni / Sn
  • RoHS & REACH
  • 500 h NSS
  • PFAS-free
Electroplating Services →
In-house anodizing line at our factory where machining and surface finishing happen under one roof
Our own anodizing hall — 3 linesMachining & finishing in the same building since 2012
Why One Roof Matters

One Factory. One Quote. One Team Accountable for Your Part.

Most suppliers machine in one place and finish in another. Every handoff adds days, risk and color variation. We keep the entire process — from raw material certification to final salt-spray test — inside our own walls.

1

RFQ & DFM Review

Upload STEP / DWG / PDF. Engineering feedback within 24 h.

2

CNC Machining

In-house milling & turning with in-process SPC monitoring.

3

Anodize / Plate In-House

Type II/III anodizing or plating, color-matched to your master sample.

4

Inspect & Ship

CMM report + material + finish certificates with every shipment.

Start Your RFQ Watch Factory Tour
Industries We Serve

Built for Brands That Ship Consumer Products

We understand cosmetic tolerances, launch deadlines and the compliance paperwork US and EU buyers actually need.

Premium over-ear headphones with brushed aluminum yokes and anodized ear cups
HEADPHONES & AUDIO

Headphones & Audio

TWS buds, headphone yokes, headbands and acoustic chambers where surface finish defines the product's perceived quality.

  • TWS housings
  • Yokes & sliders
  • Acoustic chambers
  • Color matching
Minimalist smart home control panel with brushed anodized aluminum frame
SMART HOME DEVICES

Smart Home Devices

Enclosures, wall plates, brackets and thermal parts for IoT devices that live in the customer's home — and in their hands every day.

  • Enclosures
  • Heat sinks
  • Wall mounts
  • Brushed finishes
Space gray anodized aluminum laptop docking station and USB-C hub with chamfered edges
ELECTRONICS PERIPHERALS

Electronics Peripherals

Docks, hubs, chassis and EMI shielding components with tight cosmetic and functional requirements.

  • Docking shells
  • EMI parts
  • Knobs & buttons
  • Thin-wall parts
Finish Selector

Which Surface Finish Does Your Part Need?

A quick comparison of our three finishing families — the exact question our engineers answer most often. Thickness values per MIL-A-8625 and ASTM B117 test conditions.

Comparison of Type II anodizing, Type III hardcoat anodizing and electroplating for CNC machined parts
Criteria Type II Anodizing Type III Hard Anodizing Electroplating
Coating thickness 5–25 µm 25–50 µm 3–15 µm
Best for Cosmetic surfaces: ear cups, enclosures, wall plates Wear parts: sliders, threads, yokes, hinges Steel & brass parts: corrosion protection, conductivity
Color options Wide palette, ΔE ≤ 1.0 batch matching Charcoal / black, limited dyes Natural metal tones (Zn, Ni, Sn) + trivalent passivates
Wear resistance Moderate Very high (400+ HV) Low to moderate (varies by metal)
Corrosion (salt spray) 168–336 h 336–500 h Up to 500 h with trivalent passivate
Applicable materials Aluminum alloys Aluminum alloys Steel, brass, copper
Compliance RoHS · REACH · PFAS-free options RoHS · REACH · MIL-A-8625 Type III RoHS trivalent, REACH, ELV-capable

Not sure which finish fits your project? Upload your drawing — our engineers recommend the most cost-effective finish within 24 hours, free of charge.

Products Catalog

Custom Precision Parts We Make

We do not stock finished goods. Every part below is a typical category we CNC machine and finish to customer drawings. Click any category to request a quote with your STEP or DWG file.

CNC machined and anodized aluminum headphone ear cup housing

Headphone Housings

Ear cups, TWS bud shells, yokes and acoustic chambers. Aluminum 6061, Type II anodize, ΔE ≤ 1.0.

  • Al 6061
  • Type II
  • Cosmetic grade
Request RFQ →
Brushed anodized aluminum smart home control panel enclosure

Smart Home Enclosures

Wall plates, control panels, IoT hubs and mounting bezels. Brushed or bead-blasted finish optional.

  • Al 6063 / 5052
  • Brushed
  • Silkscreen
Request RFQ →
Space gray anodized aluminum laptop docking station and USB hub enclosure

Electronics Chassis

Docking stations, USB hubs, EMI shields and thin-wall chassis. Tight cosmetic tolerances.

  • Al 6061
  • Type II / III
  • EMI options
Request RFQ →
Electroplated precision metal connector pins and brackets

Plated Connectors & Brackets

Steel and brass parts with RoHS Zn, Ni or Sn plating. Salt spray up to 500 h.

  • Steel / Brass
  • Zn / Ni / Sn
  • 500 h NSS
Request RFQ →
Color anodized aluminum frames and brackets hanging on racks

Anodized Frames & Brackets

Structural brackets, faceplates and hinge parts in blue, black, gold or custom colors.

  • Al 6061
  • Custom color
  • Hardcoat III
Request RFQ →
CNC machined aluminum heatsink and thermal parts

Thermal Parts

Heat sinks, thermal spreaders and cooling plates with high-density fins for smart home and audio devices.

  • Al 6063
  • Anodize
  • High fin ratio
Request RFQ →
JHR Hardware quality lab in Dongguan with CMM coordinate measuring machine
About Us

One Factory Focused on Precision + Surface Finish

We are Dongguan JHR Hardware Co., Ltd. (东莞市嘉弘润五金有限公司), a contract manufacturer of precision CNC machined metal parts and surface finishing for B2B brands in the US and Europe. Our factory is located in Liaobu Town, Dongguan — the heart of the Greater Bay Area manufacturing cluster, 45 minutes from Shenzhen ports.

Unlike typical job shops that send parts out for anodizing or plating, we keep CNC machining, Type II/III anodizing and electroplating under one roof. This lets us control cosmetic quality, cut lead time by up to 40%, and take accountability for the full part from raw material to final inspection.

✓Engineering-first RFQ process with free DFM feedback
✓Dedicated project engineers for US/EU time zones
✓Full material, finish and dimensional certificates per shipment
Request a Quote Download Company Profile PDF
Quality & Compliance

Certified, Measured and Documented — For US & EU Supply Chains

📋

Documented QMS

Structured quality system covering machining, anodizing and plating, with batch traceability.

🌍

RoHS & REACH

Full material declarations and PFAS-free finish options for EU buyers.

📏

CMM Inspection

Every shipment ships with dimensional reports; FAI per AS9102-style template.

🧂

Salt Spray Testing

In-house NSS chamber verifies plating corrosion resistance to 500 h.

Quality engineer inspecting anodized aluminum headphone housing on CMM coordinate measuring machine
Case Study

How One Roof Prevents Color Drift on Anodized Ear-Cup Housings

A typical scenario we handle: a headphone brand orders anodized aluminum ear-cup housings in a champagne-gold color, split across multiple production batches. Because machining and anodizing sit in the same building, we control ΔE to ≤ 1.0 batch-to-batch using a locked master sample and in-line spectrophotometry — no color drift between batches, no cosmetic rejections at incoming inspection.

≤ 1.0
Batch-to-batch ΔE
0%
Cosmetic rejections
−38%
Lead time vs baseline
Company Facts at a Glance
Legal Name
Dongguan JHR Hardware Co., Ltd.东莞市嘉弘润五金有限公司
Location
Liaobu, DongguanBuilding A, No. 376 Liaodong Rd, Xixi Village
Core Services
CNC + Anodize + PlateAll under one roof
Markets Served
US & EUGermany, UK, Nordics, France, USA
Quote Turnaround
24 hoursWith free DFM feedback
Contact
Justin Liu+86 190 9240 8380 · Call / WhatsApp
Quick Answers

Frequently Asked Questions

What tolerances can you hold on CNC machined parts?
Our standard CNC machining tolerance is ±0.02 mm; precision work is held to ±0.005 mm, verified on CMM with full inspection reports available per shipment.
Do you do machining and anodizing in the same factory?
Yes. CNC machining, Type II / Type III anodizing and electroplating are all completed in-house under one roof, which shortens lead time by up to 40% and guarantees color consistency across production batches.
What is the difference between Type II and Type III anodizing?
Type II anodizing builds a 5–25 µm decorative oxide layer, ideal for consumer electronics cosmetics. Type III (hardcoat) builds a 25–50 µm layer with much higher wear and corrosion resistance, per MIL-A-8625.
Are your finishes RoHS and REACH compliant?
Yes. All plating and anodizing processes are RoHS and REACH compliant, with PFAS-free options and full material declarations available for EU and US customers.
How do I choose between Type II, Type III and electroplating?
Choose Type II anodizing (5–25 µm) for cosmetic aluminum surfaces such as ear cups and enclosures. Choose Type III hard anodizing (25–50 µm, 400+ HV) for wear surfaces like sliders and threads. Choose electroplating for steel or brass parts needing corrosion protection or conductivity. See the full comparison table above — or just upload your drawing and our engineers will recommend the most cost-effective option free with every quote.
How fast can I get a quote?
Upload your STEP, DWG or PDF files to our RFQ form and receive a full quote with DFM feedback within 24 hours on business days.
Get a Quote

Upload Your Drawing.
Quote in 24 Hours.

Tell us about your project and our engineering team will respond with pricing, lead time and DFM feedback — usually the same business day.

✓Free DFM feedback on every quote
✓NDA available before you share files
✓Direct engineering contact, no sales middleman
Prefer to talk directly?
👤 Justin Liu (Liu Jinyang) — Sales & Engineering
📞 +86 190 9240 8380 — Call / WhatsApp / WeChat
📍 Building A, No. 376 Liaodong Rd, Xixi Village, Liaobu Town, Dongguan, China
STEP · DWG · DXF · PDF · ZIP — up to 50 MB per file
Get a Quote →