- MOQ 1 piece — order to need, not to a minimum, and keep inventory cost low.
- Lead time ~3 / 7 / 30 days depending on part complexity and the number of process steps. ±0.003 mm CNC milling, ±0.002 mm CNC turning; ±0.002 mm grinding, with Ppk ≥ 1.67 at the initial study on key characteristics and Cpk ≥ 1.33 on general characteristics. Capability is reported per characteristic: every report names the feature, its tolerance band, the sample size, the sigma method, and the study window.
- Registration 91441900MA4UWT6X39 — the entity behind the quote.
How do you compare suppliers on total cost, not price?
How do I compare metal-part suppliers on total cost?
Build a landed-cost and failure-cost model for each supplier: add freight and duty to the unit price, then add an expected reject rate times the cost of handling one defect, plus the inventory you will hold. The supplier with the higher unit price but near-zero rejects usually wins the comparison.
What are the minimum order and lead time?
What is the minimum order quantity?
The MOQ is 1 piece. Single-part prototypes and one-off repairs are accepted the same as production runs, so you can validate a design before committing to volume and reorder only what you need, which keeps the inventory bucket of total cost low.
What are the lead times?
Roughly 3, 7, or 30 days, set by part complexity and the number of process steps rather than a blanket promise. Simple parts ship in about 3 days, while parts running 10–20 process steps or needing surface finishing fall into the longer 30-day tier.
What tolerances and materials are available?
What tolerances can you hold?
±0.003 mm on CNC milling, ±0.002 mm on CNC turning, and ±0.002 mm for precision grinding, verified on Hexagon CMMs. On a representative length characteristic the process showed Cpk 1.851 (one characteristic on one part, not a blanket capability claim) against an initial-study target of Ppk ≥ 1.67 on key characteristics and a production target of Cpk ≥ 1.33.
Read the tolerance band before you read the index. Cpk is a ratio of the tolerance band to the process spread, not an absolute measure of accuracy. The figure above was recorded on a length characteristic with a 0.4 mm band (76.1–76.5 mm) — wide by design. Hold the same process spread against a ±0.005 mm feature and it fails outright. Ask for the band, the subgroup count and the sampling window on every capability number a supplier quotes.
Which materials do you machine?
Aluminum, stainless steel, carbon and alloy steel, brass, copper, titanium, and magnesium, plus engineering plastics such as ABS, POM, nylon, PTFE, and PEEK. Every incoming lot is XRF-checked against its mill certificate, so the alloy you specify is the alloy that reaches the spindle.
Which certifications and documents come with the parts?
What certifications do you hold?
ISO 9001:2015 (116024/A/0001/UK/En), IATF 16949:2016 (131941/A/0001/SM/En), and ISO 14001:2015 (116024/B/0001/UK/En), all issued by URS. The IATF 16949 scope excludes product design under Clause 8.3, so the shop operates as a build-to-print manufacturer.
What documents ship with the parts?
A first-article inspection report, a CMM dimensional report, SPC control charts, and the material certificate can ship with the parts. The documents move your incoming inspection from re-measuring everything to confirming the record, a direct saving in the supplier-management bucket.
How do quotes, payment, and shipping work?
How do I get a quote?
Email your STEP or IGES model and a 2D drawing to [email protected], with the material, quantity, and any finishing requirement. You receive a design-for-manufacturing review and an itemized quote, usually within one business day.
What payment terms do you accept?
Bank transfer (T/T) or letter of credit (L/C), typically a 30–50% deposit with the balance before shipment or against a copy of the bill of lading. Terms are negotiable depending on order size and your company's history.
How is shipping handled?
You can ship on your own DHL, FedEx, UPS, or TNT account, or freight can be arranged and included in the quote. Packaging follows your specification, and a weekly order report keeps you posted from release through dispatch.
What happens if a part is out of spec, and can you visit?
What happens if a part arrives out of spec?
Send photos of the issue and the failed parts are remade, with the remake and return shipping cost covered. Because every lot is traceable to material, machine, operator, and inspection data, the root cause is isolated rather than guessed at.
Can I visit the factory before I order?
Yes. The plant is a 6,800 m² facility in Hengli Town, Dongguan, with 100+ employees and 100+ production machines. A visit lets you audit the machine list, the XRF incoming checks, a sample CMM report, and the quality-system records in person.
These are the buckets a cheap quote tends to hide. Check each before you compare suppliers on price alone.
- Who pays the duty and freight? Confirm the Incoterm and build the landed cost into the unit price.
- Is there a reject history? Ask for SPC or CMM evidence — a low price with a high reject rate is the most expensive option.
- What is the real MOQ? A high minimum inflates your inventory cost even if the unit price looks low.
- Are secondary operations outsourced? If they are, confirm who owns them and how they affect lead time.
- Do documents ship with the parts? Missing certificates shift the verification work onto your team.
Which materials and industries do you cover?
We machine aluminum, stainless steel, titanium, brass, copper, and Inconel, plus engineering plastics including PEEK and Delrin. These metal parts go into medical, aerospace, automotive, robotics, electronics and defense applications, with the inspection, traceability and documentation each sector requires before it places an order.
What buyers ask most
Three questions come up on nearly every enquiry. What is the minimum order? One piece - a single prototype can be machined, checked and iterated before any volume is committed. What is the lead time? Roughly 3 / 7 / 30 days depending on the material and the documentation scope, from a simple aluminium part to a full first-article package. What tolerances can you hold? ±0.003 mm milled and ±0.002 mm turned, verified on a Hexagon CMM, with Ppk 1.67 or better initial and Cpk 1.33 or better in production on critical characteristics. The answers are short because the capability is specific, not vague.
The answers behind the answers
The plant behind these answers is Dongguan Zhuohang Ltd - 6,800 m² in Hengli Town, Dongguan, 100+ CNC machines including Mazak VARIAXIS I-600 and INTEGREX I-250H S, and certification to ISO 9001:2015, IATF 16949:2016 and ISO 14001:2015 with the certificate numbers published and verifiable. 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, with worldwide shipping from Dongguan. Contact Felipe Iglesias at [email protected] or +86 13126536955 with a drawing and a quantity for a specific answer to your specific part.
What the floor can actually prove
Behind the numbers is a floor you can walk. Dongguan Zhuohang Ltd runs 100+ CNC machines - the Mazak VARIAXIS I-600 five-axis, the INTEGREX I-250H S mill-turn, Brother SPEEDIO, and TSUGAMI, STAR and CITIZEN Swiss lathes - across 6,800 m² in Hengli Town, Dongguan. Every critical feature is checked on a Hexagon CMM under the 10:1 gauge rule, and the certificate numbers for ISO 9001:2015, IATF 16949:2016 and ISO 14001:2015 are published and verifiable. Capability is tracked with Ppk 1.67 or better at the initial study and Cpk 1.33 or better in production, which is the difference between a tolerance that is quoted and a tolerance that is held.
The same floor serves buyers worldwide - 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 shipping from Dongguan. MOQ is 1 piece and lead times run roughly 3 / 7 / 30 days depending on material and documentation. Send the drawing and the quantity to Felipe Iglesias at [email protected] or +86 13126536955, and the quote comes back with the process behind it.
Your next step
A drawing and a quantity are all it takes to turn this page into a real part. Send a STEP or IGES model plus a 2D drawing carrying the tolerances, datums, material grade and finish, and name the quantity and the lead time. That returns an itemised quote - material, setup, cycle time, inspection - instead of a round number. If the drawing is not done, send what exists and the questions holding you back; starting the conversation matters more than waiting for a perfect package.
Reach Felipe Iglesias at [email protected] or +86 13126536955. MOQ is 1 piece, lead times run roughly 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, with worldwide shipping from Dongguan.
Tolerances and finishes, in one reference
Milling holds ±0.003 mm, turning ±0.002 mm, and grinding or wire EDM ±0.002 mm, each verified on a Hexagon CMM against the datum scheme on the drawing. Surface finishes run 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 applies to every feature - the instrument resolves ten times finer than the tolerance it checks. And a part is only as good as its datum: the same callout read against two different datums yields two different parts, so name the datum and the convention, ASME Y14.5 or ISO, on the drawing.
Choosing the right material
Aluminium 6061-T6 is the default light and economical pick; 7075-T6 adds strength for aerospace and structural work. Stainless 303 machines cleanly for fittings, 304 and 316 add corrosion resistance, and 17-4 PH gains strength after ageing. Steel is the strength-and-cost workhorse. Brass is the fastest metal to cut and conducts well. Copper C110 sets the conductivity benchmark, with C145 tellurium copper for machinability. Titanium and Inconel keep high-temperature strength but machine slowly and cost more. Material is the biggest lever on price, so choose it for the service - load, environment, temperature - not by habit, and name the grade on the drawing so the mill certificate confirms it.
De-risking a first order
If this is a first order, a small trial run is the cheapest way to de-risk: a few parts shipped with the drawing and the inspection report, so the routing, the tolerance and the documentation are proven before volume commits. The same floor, the same CMM and the same certificates cover one piece and a thousand alike, so the trial result carries straight into the production run.
What this shop actually runs
Ask for capability evidence and the answer should be specific. The facility behind this guide runs 100+ CNC machines on a 6,800 m2 floor in Dongguan, China, 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). Matched to 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). Matched to 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). Matched to 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). Matched to shafts, bushings, flanges up to ±0.002 mm.
- Wire EDM (5+) - Sodick AQ535L (550/350/300 mm travel, ±20° taper, 800 kg workpiece). Matched to 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.
Tolerances held: milling ±0.003 mm, turning ±0.002 mm, grinding and wire EDM ±0.002 mm. Capability: Ppk >= 1.67 initial and 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, clause 8.3 design excluded, disclosed openly) and 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 — built in China, shipped worldwide.
Contact: Felipe Iglesias, [email protected], +86 13126536955.
Have a question not covered here?
Email your drawing and question to [email protected] or call +86 13126536955 — a specific question gets a specific answer.
Standards referenced on this page
- ASTM A276/A276M-17 — Standard Specification for Stainless Steel Bars and Shapes
- ASTM B211/B211M-19 — Standard Specification for Aluminum-Alloy Rolled or Cold Finished Bar, Rod, and Wire
- ISO 9001 — Quality management systems — Requirements