4 Axis CNC Milling Factory

Why should you verify the physical factory before transferring supply risk?

A website can claim any machine list, any capacity, any certificate. A physical factory has to stand behind those claims when you walk the floor. Verifying the building, the machines, the certificates, and the team before you commit is the only way to confirm you are handing your supply chain to a real manufacturer rather than a trading desk that buys and resells someone else's output.

This page is written for that verification. It states the legal entity, the machine families, the facility size, and the certificates — all of which can be checked independently — and it lists what to look for on a visit.

Verification splits into two tracks that reinforce each other. Remote verification — checking the registration number, the certificate numbers, and the machine list against public records — costs nothing and weeds out the worst trading desks before you spend a flight. On-site verification — walking the floor, reading the serial plates, and watching a first article run — confirms the remote claims with your own eyes. A real manufacturer welcomes both; a reseller stalls on the second.

What is the legal entity behind this factory?

The site and the factory are one accountable legal entity, not a brand over a reseller.

Item	Detail
Legal name	Dongguan Zhuohang Ltd
Marketing name	Zhuohang Precision Machining Factory
Registration number	91441900MA4UWT6X39
Founded	2005
Location	Hengli Town, Dongguan, Guangdong, China

The registration number is a China unified social credit code and can be verified independently, which is exactly what a careful buyer should do before committing production volume.

What machines are actually on the floor?

A manufacturer names machine models and counts; a trading company recycles brochures. The floor runs these families:

Machine family	Role
Brother SPEEDIO	High-speed vertical machining centers
Mazak VCE / VARIAXIS / INTEGREX / QT	Vertical, 5-axis, and multi-task mill-turn centers
Citizen Cincom / Star SR / Tsugami	Swiss-type and precision lathes for long slender parts

In total, 100+ production machines cover 3-axis (50+), 4-axis (20+), 5-axis (20+) milling, 25+ turning centers, and 7+ grinders. Maximum workpiece is 1300 × 700 × 600 mm for milling and Ø720 × 1280 mm for turning.

For this site's core capability — 4-axis milling — the relevant equipment is the rotary-axis vertical centers that index a part through multiple faces in one clamping. The count matters less than the configuration: a rotary table on a vertical center delivers the A-axis a multi-face housing needs, and a tombstone fixture multiplies that table into batch cells for production runs. When you ask for the machine list, ask which machines carry the 4th axis and whether the shop runs indexed or simultaneous work on them. That answer tells you whether the capability is real or borrowed from a partner.

How large is the facility and team?

The facility is 6,800 m² across two buildings in Hengli Town, Dongguan — one housing production, inspection, and offices; the other staff dormitories and a canteen. The team is 100+ employees, more than 80% of whom are skilled technicians, with 60% holding five to ten years of service. A stable, senior workforce is itself a risk control: it means the process knowledge stays in the building.

Facility size and headcount are the coarse facts; what they imply is the real point. A 6,800 m² floor with a dedicated inspection room means inspection is not squeezed into a corner of production. A team where more than 80% are skilled technicians, and 60% have five to ten years of service, means the knowledge of how to hold a tolerance lives in the building rather than walking out the door with a departed operator. For you, that continuity is the difference between a supplier who has learned from past jobs and one who is learning on yours.

What inspection equipment verifies the work?

The inspection room is what turns a tolerance claim into a tolerance fact. The equipment is the same class a buyer would use to audit the shop:

• Hexagon GLOBAL S CMMs for dimensional verification, plus a gear measuring center and vision measuring machines.
• KEYENCE VK-X3000 laser microscope and SURFCOM 1800D for surface finish and profile.
• XRF (iCHEQ) spectrometer for incoming material composition checks.
• HVS-1000A micro-Vickers hardness tester, Fischer coating thickness gauge, and salt spray and tensile testers.

That is 20+ inspection instruments supporting the process capability, with documented reports rather than pass/fail stamps.

The instruments are only half the story; the other half is that they are used on a schedule and their results are kept. A CMM that is calibrated but never documented is a decoration, not a control. Here each critical dimension gets a report, and those reports are what you can request before or after shipment.

Which certifications are on the wall?

Three certificates back the quality and environmental systems, with scope stated honestly.

Standard	Certificate number	Scope
ISO 9001:2015	116024/A/0001/UK/En	Machining of metal parts
IATF 16949:2016	131941/A/0001/SM/En	Manufacture of CNC metal machining parts (excludes product design, Clause 8.3)
ISO 14001:2015	116024/B/0001/UK/En	Environmental management related to machining of metal parts

Honest scope note: IATF 16949 excludes product design under Clause 8.3. This is a build-to-print manufacturer. If a program needs design ownership, it is scoped up front rather than over-promised.

What should you check on a factory visit?

A visit is the fastest way to separate a manufacturer from a reseller. Five checks cover most of the ground.

How does this factory protect your IP and data?

For you outsourcing precision parts, the drawing is often the most valuable thing being shared. Protection is structural, not verbal:

• Physical files — sensitive paper documents stored in an access-controlled secure space.
• Digital data — electronic files kept on encrypted drives, with responsible use, storage, and disposal.
• Policy — confidentiality, data protection, and IP protection are written into the supplier code of conduct.

The factory also operates a rooftop solar array generating about 20,000 kWh of electricity a month, and holds ISO 14001 — relevant to buyers whose own ESG or procurement policies require audited suppliers.

What does the factory's location mean for your supply chain?

Dongguan sits in the Pearl River Delta, the densest precision-machining region in China, ringed by the material suppliers, plating houses, and heat-treat shops that a machining factory depends on. The practical effect for you is short, stable secondary-operation lead times — anodizing, plating, and heat treatment are handled by qualified partners nearby, so a part does not travel far between the machine and the finishing line.

Location also shapes logistics. Finished parts leave from a region with mature export infrastructure, and the factory ships to Europe, North America, Japan, Australia, and New Zealand under the Incoterms you specify. What you should take from the location is not a distance claim but a structural point: the supply chain that feeds this factory is the same one that feeds the region's largest manufacturers, which is why a small order can be sourced and finished on the same schedule as a large one.

How do you independently verify this factory's claims?

Every claim on this page is checkable, and a careful buyer checks them. Four independent checks cover most of the ground.

• Registration number — 91441900MA4UWT6X39 is a China unified social credit code that can be looked up against public company records to confirm the legal entity and its founding date.
• Certificate numbers — the ISO 9001, IATF 16949, and ISO 14001 numbers can be confirmed with the issuing registrar, which is the only proof a certificate is current rather than copied.
• Machine list — model families and counts can be confirmed on a visit or by requesting serial-number-level detail for the specific machines that would run your part.
• Inspection evidence — a CMM report or SPC chart from a real job, plus a material certificate with XRF verification, proves the tolerance and material claims with data rather than adjectives.

The point of independent verification is not distrust; it is that if you verify, you pay for capability, while if you trust, you pay for whatever the seller chooses to claim. A factory that publishes its registration and certificate numbers is inviting you to check them, and that invitation is itself the first signal you are dealing with a manufacturer.

What this shop actually runs

Capability evidence should come as specifics, not slogans. Behind this guide is a 6,800 m2 plant in Dongguan, China running 100+ CNC machines with 100+ staff. The machine list by category:

• 5-axis machining centres (10+) - Mazak VARIAXIS I-600 (510/910/510 mm travel, 12,000 rpm, 22 kW, 71.6 N·m, 30-tool BT40) and Mazak INTEGREX I-250H S (B-axis 0.0001°, 24 kW, 124 N·m, 38-tool HSK-A63). Best for compound-angle parts, single-setup multi-face prismatic work, and aerospace fittings where datum transfer loss is unacceptable.
• 3-axis / 4-axis machining centres (50+) - Brother SPEEDIO S500Z2N / S700Z2N (10,000 rpm, 14/21-tool ATC, 0.7 s tool-to-tool, Z-axis 2.2 G) and Mazak VCE-430A L / VCE-570C L (10,000 rpm, 118 N·m, 24-tool ATC). Best for prismatic parts, plates, brackets, housings.
• Swiss-type turning centres (10+) - Citizen Cincom A20-3F7 (Φ20 mm, 10,000 rpm), TSUGAMI B0206-III / B0205-III (Φ20 mm, 0.1 µm), STAR SR-32JII / SR-32J Type N (Φ32 mm, 8,000 rpm). Best for long, slender rotational parts at ±0.002 mm.
• CNC turning centres (20+) - HEADMAN T70M/1250 (720 mm swing, 117 mm bore, 3,000 rpm, BMT75 12-station turret). Best for shafts, bushings, flanges up to ±0.002 mm.
• Wire EDM (5+) - Sodick AQ535L (550/350/300 mm travel, ±20° taper, 800 kg workpiece). Best for hardened tool steel, internal splines, sharp internal corners that milling cannot reach.
• Inspection: Hexagon CMM + 20+ gauges - Hexagon CMM for coordinate measurement, plus vision system, profilometer, hardness tester, coating thickness gauge, XRF for material verification. The 10:1 rule (gauge 10x more accurate than the band) is applied to every feature.
• Machine highlights - VARIAXIS I-600: one-setup multi-face 5-axis + MAZA-CHECK auto-calibration; INTEGREX I-250H S: DONE-IN-ONE mill-turn, B-axis 0.0001° + Ai thermal shield; SPEEDIO S500Z2N / S700Z2N: Z-axis 2.2 G + 0.7 s ATC; Swiss-type: guide-bush switchable + 0.1 µm resolution.

Tolerance: ±0.003 mm CNC milling / ±0.002 mm CNC turning / ±0.002 mm grinding and wire EDM. Capability: Ppk >= 1.67 initial on key characteristics, Cpk >= 1.33 ongoing.

Certificates: ISO 9001:2015 (116024/A/0001/UK/En), IATF 16949:2016 (131941/A/0001/SM/En, with design clause 8.3 excluded, stated openly) and ISO 14001:2015 (116024/B/0001/UK/En), issued to Dongguan Zhuohang Ltd, registration 91441900MA4UWT6X39, founded 2005.

Where we ship: Austria, Belgium, the Czech Republic, Denmark, France, Germany, Greece, Hungary, Ireland, Italy, the Netherlands, Spain, Sweden and the United Kingdom in Europe; Brazil, Canada, Mexico and the United States in the Americas; China, Israel, Japan, Singapore and Sri Lanka in Asia; Australia and New Zealand in Oceania; and South Africa in Africa — plus other countries and regions worldwide, shipped from our base in Dongguan, China.

Contact: Felipe Iglesias, [email protected], +86 13126536955.

Frequently Asked Questions

Standards referenced on this page

• ASTM A582/A582M-12 — Standard Specification for Free-Machining Stainless Steel Bars
• ISO 14001 — Environmental management systems — Requirements with guidance for use
• ASTM E8/E8M-21 — Standard Test Methods for Tension Testing of Metallic Materials