The shop behind this cost so guide — verified and quotable in one exchange
This guide's facility holds 100+ CNC machines across a 6,800 m² plant at No. 8, Shuibian Songyuan Road, Hengli Town, Dongguan, Guangdong, China 523470. Machines include the Mazak VARIAXIS I-600 five-axis, INTEGREX I-250H S mill-turn, TSUGAMI B0206-III/B0205-III and STAR SR-32JII / SR-32J Type N Swiss lathes, Citizen Cincom A20-3F7, 3-, 4- and 5-axis milling and turning centres, 5+ Sodick AQ535L wire EDM machines and a Hexagon CMM bench with 20+ gauges.
Tolerances held: ±0.003 mm milled, ±0.002 mm turned, and ±0.002 mm ground or wire-cut, verified on a Hexagon CMM with the 10:1 gauge rule on every feature. Capability indices: Ppk ≥ 1.67 initial, Cpk ≥ 1.33 in production, on key characteristics. Certifications: ISO 9001:2015 (116024/A/0001/UK/En), IATF 16949:2016 (131941/A/0001/SM/En, design clause 8.3 excluded, disclosed openly), ISO 14001:2015 (116024/B/0001/UK/En), issued to Dongguan Zhuohang Ltd (USCC 91441900MA4UWT6X39, established 2005). Service area: 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 — based in China, delivering worldwide. Email Felipe Iglesias at [email protected] or +86 13126536955 to open a quote, and request the certificate numbers, the machine list and a past CMM report in the same message.
CNC cost — the four lines and the volume crossover
A CNC quote is built from four lines — material, setup, cycle, and inspection — and if you read them separately, you can tell where the price moves. The material line is the bar or billet at the mill price plus the section waste; the setup line is the fixture and the first-article labour, amortised across the quantity; the cycle line is the machine hourly rate multiplied by the cutting time; the inspection line is the Hexagon CMM and the gauge work. The crossover where setup amortises is roughly the point where the setup cost divided by the quantity falls below the cycle cost — typically tens of pieces.
The volume crossover is where CNC meets casting or stamping. Below a few hundred pieces, billet machining is competitive because there is no tooling to amortise; above a few thousand, casting or stamping with purpose-built tooling wins on piece price. The crossover is geometry-dependent: a complex housing may crossover at 2,000 pieces; a simple bracket may crossover at 500. If you ask for both routings at the quote stage, you get the decision written into the quote. The facility behind this guide runs 100+ CNC machines at ±0.003 mm milling and ±0.002 mm turning and grinding on Hexagon CMM, with Ppk ≥ 1.67 initial and Cpk ≥ 1.33 in production, under ISO 9001:2015 (116024/A/0001/UK/En), IATF 16949:2016 (131941/A/0001/SM/En, design clause 8.3 excluded), and ISO 14001:2015 (116024/B/0001/UK/En).
The material lever is the first. A part in titanium costs more than the same part in aluminium; a part in Inconel costs more than all. The tolerance lever is the second — a ±0.1 mm band runs on a general-purpose machine; a ±0.003 mm band runs on a precision machine with a rigid fixture and a temperature-controlled inspection. Specify the band and the process together. Ask for the four-line breakdown in the quote — material, setup, cycle, inspection — and compare across suppliers. Contact Felipe Iglesias at [email protected] or +86 13126536955.
- over a hundred machines including 20+ 5-axis centres; 100+ staff, 80%+ skilled technicians.
- Exports to 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 — based in China, serving customers worldwide.
- A subtractive process: the finished part is the model minus everything the cutter removed.
- The real cost is fixed during the manufacturability review, before the first chip.
- No minimum order. Prototype and production run on the same machines.
Failure modes and their controls
The failures that cost money are rarely dramatic. They are the quiet ones: a tolerance held on the machine and lost in a later operation, a revision built from a superseded drawing, and a surface finish callout that means something different under another standard.
Each has a cheap control. Datum structure reviewed at quote stage, revision confirmed in writing on the order acknowledgement, drawing standard confirmed when the files arrive. None cost anything, which is what makes their absence hard to excuse.
How much capacity sits behind it?
over a hundred 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 is the certification position?
ISO 9001:2015, IATF 16949:2016 (excluding clause 8.3 product design), and ISO 14001:2015, each with a certificate number verifiable with the registrar.
The sequence behind a finished part
The sequence is quoting and manufacturability review, then programming and offline verification, then fixturing, then roughing, then finishing, then inspection and first-article reporting. 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, can cut cycle time more than any change of machine, because it changes the tool that can be used, and a stiffer tool removes more material per minute.
The cost structure of machining services
Cost is driven by setup time amortised over quantity, cycle time, material and tooling, inspection labour, and the risk premium on the tolerance. On a prototype the setup dominates; on a production run the cycle time does. That is why a per-part price without a quantity is not a price.
The driver buyers most often underestimate is inspection. A drawing that calls out twenty dimensions has a different inspection cost from one that calls out five, and someone has to actually write the first-article report.
What fails on this process, and when
The failures that cost money are not crashes. They are the quiet ones: a tolerance held on the machine but lost in a later operation, a revision built from a superseded drawing, and a surface finish callout that meant something different in another standard.
Each has a cheap control. Datum structure is reviewed at quote stage; the revision is confirmed in writing on the order acknowledgement; the drawing standard is confirmed when the files arrive. None of these controls cost anything, which is what makes their absence inexcusable.
Four questions that expose a machining services reseller
These four checks cost nothing and can be run before any commitment.
- Can they name the registration number? Ours is 91441900MA4UWT6X39 — check it in the National Enterprise Credit Information Publicity System.
- Do they name machine families and counts? A manufacturer lists models; a reseller recycles stock photos.
- Are the certificate numbers verifiable? Real ISO/IATF certificates carry numbers you can confirm with the registrar.
- Can you walk the floor? On-site and video audits are welcome at the Dongguan address.
What design decisions move the cost on machining services?
Three design decisions drive most of the cost on a machined part: internal corner radii matched to a real cutter diameter, cavity depth kept within about four times the tool diameter, and a general tolerance on every feature that does not mate. Each one changes the tool that can be used, and the tool determines how much material can be removed per minute, which is why these matter more than any process selection.
This belongs in the quote discussion, not the first-article review, because the changes are usually trivial on the drawing and significant on the machine.
What the capability numbers actually mean
For capability reporting, key and special characteristics start at Ppk ≥ 1.67 and run at Cpk ≥ 1.33 in production; general characteristics start at Ppk ≥ 1.33. Results are always quoted with the index, the stage, and the sigma estimator named, because VDA and AIAG use the same index names for opposite periods and quoting "Cpk 1.67" without that context is meaningless.
Values between 1.33 and 1.67 are conditional acceptance requiring customer review, not a pass. Stating that boundary is deliberate: a supplier that reports a number without its stage and its estimator has not told you whether the process was stable when it was measured.
Which legal entity is actually responsible for the work?
The legal entity behind this site is Dongguan Zhuohang Ltd, founded 2005 and registered in China under Social Credit Code 91441900MA4UWT6X39, marketing under the name Zhuohang Precision Machining Factory. Its registered and production address is No. 8, Shuibian Songyuan Road, Hengli Town, Dongguan, Guangdong, China 523470.
Use the National Enterprise Credit Information Publicity System and the 18-character code to verify a Chinese manufacturer. Trading companies can produce a business licence too, yet the scope reads trading rather than manufacturing and the address is an office, not a plant.
What this shop actually runs
If you ask for capability evidence, you deserve a specific answer. This facility operates 100+ CNC machines across 6,800 m2 in Dongguan, China, staffed by 100+ people. The machines, listed 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). Used on 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). Used on 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). Used on 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). Used on shafts, bushings, flanges up to ±0.002 mm.
- Wire EDM (5+) - Sodick AQ535L (550/350/300 mm travel, ±20° taper, 800 kg workpiece). Used on 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 bands: ±0.003 mm milled, ±0.002 mm turned, ±0.002 mm ground or wire-cut. Capability indices: Ppk >= 1.67 at the initial study; Cpk >= 1.33 ongoing in production.
Certifications: ISO 9001:2015 (116024/A/0001/UK/En) · IATF 16949:2016 (131941/A/0001/SM/En, design clause 8.3 excluded) · ISO 14001:2015 (116024/B/0001/UK/En), held by Dongguan Zhuohang Ltd (USCC 91441900MA4UWT6X39, since 2005).
Service area: we supply 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, with worldwide delivery from China.
Contact: Felipe Iglesias, [email protected], +86 13126536955.
Send a drawing and get a manufacturability read
Upload your model for a quote, or arrange a factory audit with [email protected] or +86 13126536955. Ask for Felipe Iglesias.
Frequently Asked Questions
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.
How long does machining services take?
Lead time is driven less by cutting time than by queue position, fixture design, and inspection. A part that needs a purpose-built fixture has a longer first-article lead and a much shorter repeat lead, which is worth asking about separately.
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.
What is the difference between machining services and similar process?
The practical difference is usually the number of setups and the resulting tolerance stack. Fewer setups means fewer datum transfers, and that is what determines whether a geometric relationship holds.
Is inspection documentation included in the quote?
It should be stated explicitly. A first-article report is a document someone has to produce, and whether it is a full dimensional report or a sample plan changes both the cost and what you receive.
How are parts packed for export?
Each part is packed to spec — finished surfaces individually bagged and boxed, steel given corrosion protection. Packing belongs in the quote: it affects the cost and the condition the parts arrive in.
Standards referenced on this page
- ASTM A582/A582M-12 — Standard Specification for Free-Machining Stainless Steel Bars
- ASTM A484/A484M-24 — Standard Specification for General Requirements for Stainless Steel Bars, Billets, and Forgings
- ISO 9001 — Quality management systems — Requirements