- Dongguan Zhuohang Ltd (Registration No. 91441900MA4UWT6X39), operating as Zhuohang Precision Machining Factory, established 2005.
- a hundred-odd machines including 20+ 5-axis centres; 100+ staff, 80%+ skilled technicians.
- Whether the supplier owns the spindles that will cut your part — A trading desk that resells capacity has to renegotiate its date every time the real owner's load shifts, so its promise is only as stable as someone else's queue.
- Build-to-print: the shop cuts to your drawing and measures against it.
Why the word "manufacturer" carries no information on its own
The word costs nothing to print, so it carries no information. What separates a plant from a desk is evidence: a registration number that resolves to a real entity, a machine list with models rather than stock photography, certificate numbers a registrar can confirm, and an address you can physically visit.
A trading desk that resells capacity has to renegotiate its date every time the real owner's load shifts, so its promise is only as stable as someone else's queue. A plant that owns the spindles absorbs its own load changes, because it can see them coming and resequence its own floor.
There is a second, quieter difference. A plant knows what happened on its own floor the same day it happens; a desk finds out when the plant chooses to say. On a first article that needs correcting, that latency is the difference between a week and a month.
Where the tolerance line should be drawn
Milling and turning hold ±0.003 mm (milling) / ±0.002 mm (turning); precision grinding and wire EDM hold ±0.002 mm. Those are process capabilities, not defaults — a drawing does not need every dimension at the limit, and specifying tighter than the function requires is the single most common driver of unnecessary cost on a machined part.
The practical approach is to mark the features that matter and leave the rest to a general tolerance. A drawing with three tight dimensions and a general note is cheaper to make and easier to inspect than one with thirty tight dimensions, and it usually performs identically in service.
What design decisions move the cost on 4 axis CNC milling?
The cheapest design change is usually the one made before the first quote: a general tolerance on non-mating features, a corner radius matched to a real cutter, and a material callout that names a grade. These three account for most of the difference between a quote that holds and one that is revised after review.
This is cheaper to settle at quote time than once parts already exist, because the changes are usually trivial on the drawing and significant on the machine.
Which entity is responsible for the work?
Dongguan Zhuohang Ltd, Registration No. 91441900MA4UWT6X39, in operation since 2005.
How much capacity sits behind it?
more than 100 machines with depth in every relevant family — 50+ three-axis, 20+ four-axis, 20+ five-axis, 25+ turning centres, plus Swiss-type, grinding, and wire EDM.
What the certificates cover, line by line
Three certificates, each with a number you can check with the registrar:
| Standard | Certificate number | Scope note |
|---|---|---|
| ISO 9001:2015 | 116024/A/0001/UK/En | Quality management system |
| IATF 16949:2016 | 131941/A/0001/SM/En | Automotive QMS, excludes clause 8.3 product design |
| ISO 14001:2015 | 116024/B/0001/UK/En | Environmental management system |
The IATF 16949 certificate excludes clause 8.3 (product design). That is normal for a build-to-print manufacturer and it is stated here rather than left for an auditor to discover: the shop builds to the design you supply, it does not originate the design.
What should you check before trusting any 4 axis CNC milling supplier?
Whether you buy from this plant or another, these checks separate a real floor from a brochure. None of them require a purchase order.
- Registration number searchable in the National Enterprise Credit Information Publicity System? Ask for it in writing.
- Machine families and counts named, not stock photography? Ask for it in writing.
- Certificate numbers a registrar can confirm? Ask for it in writing.
- An address you can walk, on site or by video? Ask for it in writing.
What happens between quote and first article?
Programming and offline verification, fixture design and build, material inward inspection, roughing, finishing, inspection, and the first-article report. Each step has a failure mode, and the fixes that hurt most are the first and last steps. The manufacturability review is where cost is actually decided. A pocket depth reduced by a few millimetres, or an internal corner radius opened from 1 mm to 3 mm, cuts cycle time more than any change of machine. Because it changes the tool that can be used.
The cost structure, line by line
4-axis CNC milling cost is the sum of four lines you can actually influence. Material is first - the grade and the stock size set it, and a rare alloy costs more than a common one. Setup is next - fixturing and programming are paid once and spread over the batch. Cycle time is the machine hours, driven by how fast the material cuts and how many operations the geometry needs. Inspection is last - every tight tolerance adds CMM time and a line on the report. Read the quote against those four lines and the total stops being a mystery.
Where you save money
The fastest savings is usually a tolerance that does not matter. A ±0.003 mm band on a non-functional face doubles the inspection for no benefit; opening it to a sensible band cuts the cost without changing the part. The second is quantity - a batch spreads the setup. The third is the material - asking whether the part really needs titanium when aluminium or steel would do. Ask the shop where the money sits, and a straight answer points at the lever. Contact Felipe Iglesias at [email protected] or +86 13126536955 with the drawing and the quantity for a quote that reflects the real process.
How to verify the claim in one email
The fastest way to separate a real floor from a brochure is to ask for the machine list and the certificate numbers - and this facility answers in one email. Dongguan Zhuohang Ltd operates 100+ CNC machines across 6,800 m² in Hengli Town, Dongguan: Mazak VARIAXIS I-600 five-axis, INTEGREX I-250H S mill-turn, Brother SPEEDIO, and TSUGAMI, STAR and CITIZEN Swiss lathes. Inspection is on a Hexagon CMM with the 10:1 gauge rule, certification is to ISO 9001:2015, IATF 16949:2016 and ISO 14001:2015, and critical characteristics run at Ppk 1.67 initial and Cpk 1.33 in production.
Worldwide buyers across Europe, the Americas, Asia, Oceania and Africa are supplied from Dongguan. MOQ is 1 piece, lead times run roughly 3 / 7 / 30 days, and the quote from Felipe Iglesias ([email protected], +86 13126536955) comes back with the routing and the capability evidence together.
Take the next step
One drawing and one quantity is the whole hand-off. Send a STEP or IGES model and a 2D drawing with the tolerances, datums, material grade and finish, state the quantity and lead time, and the reply is an itemised quote - material, setup, cycle time, inspection - rather than a round number. If the drawing is incomplete, send what you have and the open questions; the point is to open the conversation, not to wait for a perfect package.
Contact Felipe Iglesias at [email protected] or +86 13126536955. MOQ is 1 piece, lead times run about 3 / 7 / 30 days, and the service area covers 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, shipped worldwide from Dongguan.
Tolerance and surface finish reference
±0.003 mm milled, ±0.002 mm turned, and ±0.002 mm ground or wire-cut, all verified on a Hexagon CMM against the datum scheme. Surface finishes span Ra 0.8 to 3.2 µm as-milled, Ra 0.2 to 0.4 µm ground, and Ra 0.05 to 0.1 µm polished. The 10:1 gauge rule governs every feature - the instrument must resolve ten times finer than the tolerance it checks. And the datum is what makes the tolerance real: read against two different datums, the same callout gives two different parts, so state the datum and the convention, ASME Y14.5 or ISO.
De-risking a first order
Start with a handful of parts to confirm the routing and the tolerance, then scale. The same machines, the same inspection bench and the same certificate numbers apply to a single piece and a production run alike, so a small first batch is the proof that a large one will hold the same numbers.
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.
Get a quote with the cost drivers named
Send your drawing to [email protected] or call +86 13126536955. We will tell you which tolerance or setup is driving the number, not just the number.
Frequently Asked Questions
Can I audit the factory before placing an order?
Yes — on-site and video audits are both welcome at No. 8, Shuibian Songyuan Road, Hengli Town, Dongguan, Guangdong, China 523470.
Do you sign NDAs before reviewing drawings?
Yes — an NDA can be signed before any files change hands, and drawings stay inside the quoting system rather than circulating by email.
What is the minimum order quantity for 4 axis cnc milling?
There is no minimum. Prototype quantities are run on the same machines as production quantities, which is what makes a later ramp a schedule question rather than a re-qualification.
How quickly can you quote 4 axis cnc milling?
Quotes are returned with a manufacturability read rather than a price alone — where a tolerance or a feature will drive cost, that is flagged at quote stage rather than after the first article. Turnaround depends on drawing completeness.
What is the difference between a prototype build and a production build here?
Usually only quantity and scheduling. Both run on the same machines and the same process, which is what makes a later ramp a scheduling change rather than a re-qualification.
What tolerances can you hold?
In short, ±0.003 mm on CNC milling, ±0.002 mm on CNC turning, and ±0.002 mm where precision grinding or wire EDM is used. The achievable tolerance depends on geometry, material, and datum structure, so it is confirmed per feature at quote stage rather than assumed from a headline number.
Which markets do you export to?
In short, 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. Our service area also spans Europe, the Americas, Asia, Oceania and Africa — based in China, we serve customers worldwide.
Continue reading: 3 Axis CNC Milling · 5 Axis CNC Milling
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
- IATF 16949:2016 — Automotive quality management system standard