FAQs

The shop behind this faqs guide — verified and quotable in one exchange

Backing this guide is a 6,800 m² plant at No. 8, Shuibian Songyuan Road, Hengli Town, Dongguan, Guangdong, China 523470, running 100+ CNC machines — Mazak VARIAXIS I-600 and INTEGREX I-250H S, TSUGAMI B0206-III/B0205-III, STAR SR-32JII / SR-32J Type N, Citizen Cincom A20-3F7 — plus 3-, 4- and 5-axis milling and turning, 5+ wire EDM and a Hexagon CMM bench with 20+ gauges.

Milling holds ±0.003 mm, turning ±0.002 mm, and grinding or wire EDM ±0.002 mm, all checked on a Hexagon CMM with the 10:1 gauge rule applied to every feature. Capability: Ppk ≥ 1.67 initial and Cpk ≥ 1.33 in production on key characteristics. Certified to ISO 9001:2015 (116024/A/0001/UK/En), IATF 16949:2016 (131941/A/0001/SM/En, design clause 8.3 excluded, openly disclosed) and ISO 14001:2015 (116024/B/0001/UK/En), held by Dongguan Zhuohang Ltd, USCC 91441900MA4UWT6X39, established 2005. Customers across 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 are supplied from China, worldwide. Contact Felipe Iglesias at [email protected] or +86 13126536955 to begin the quote, and ask for the certificate numbers, the machine list and a past CMM report together.

The answers below follow the buying journey in order — from the questions you ask before you travel, through the technical and commercial terms, to what happens after the parts arrive. Each answer is stated the same way here as it would be answered in an email or on an audit call, so there are no surprises when you ask it directly.

What should you prepare before auditing a supplier?

The audit is cheaper and more useful when you walk in with a checklist. The core questions below cover the first things you ask — whether the supplier is a real manufacturer and how to schedule a visit — before any drawing changes hands. Knowing these answers up front saves a wasted trip and a wasted order, because they separate a factory you can verify from a trading desk you cannot.

Are you a manufacturer or a trading company?

A manufacturer. Dongguan Zhuohang Ltd operates its own 6,800 m² facility in Dongguan with 100+ production machines, 20+ inspection instruments, and 100+ employees. The equipment list is verifiable on a factory visit rather than recycled from a brochure.

How do I schedule a factory audit?

Email [email protected] or call +86 13126536955 to arrange a date. Pickup can be arranged, and the sales team works in English, Portuguese, Spanish, French, and Chinese, and Japanese, so language is not a barrier.

How do you verify certifications and quality evidence?

Certifications are only as good as your ability to check them, and quality evidence should arrive before the order, not after the parts. These questions are the heart of the pre-audit, because a certificate number you can verify and a CMM report you can read are the difference between buying a claim and buying a fact.

How do I verify your certifications are real?

Check the certificate numbers with the registrar. The facility holds 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.

What quality evidence can I request before ordering?

Request the certificates, a CMM report, an SPC chart, and a first-article inspection format. These documents arrive with the quote, so the tolerance and quality evidence is in hand before you commit.

How do I check a supplier's process control (SPC)?

Ask for a live control chart and its Cpk. Here the standard is Ppk ≥ 1.67 at the initial study on key characteristics and Cpk ≥ 1.33 on general ones, with a representative length characteristic charted at Cpk = 1.851 (one characteristic on one part, not a blanket capability claim).

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.

What materials, tolerances, and processes can you expect?

These are the technical questions that decide whether a supplier can make your part at all — the material range, the tolerance it can hold, and the evidence behind that tolerance. A supplier that answers these with specifics is scoped for your job; one that answers with slogans is not.

What materials do you machine?

Aluminum, stainless steel, carbon and alloy steel, brass, copper, titanium, and magnesium, plus engineering plastics including ABS, POM, nylon, PTFE, and PEEK. Incoming metal is XRF-checked against the mill certificate.

What tolerances can you hold?

±0.003 mm on CNC milling, ±0.002 mm on CNC turning, and ±0.002 mm for precision grinding. Critical dimensions are verified on Hexagon CMMs, with process capability Ppk ≥ 1.67 at the initial study on key characteristics and Cpk ≥ 1.33 on general characteristics.

What machining processes do you run in-house?

3-, 4-, and 5-axis CNC milling, CNC turning, mill-turn machining, and surface, centerless, and cylindrical grinding, plus deburring, laser marking, cleaning, and assembly. Heat treatment and some surface finishing run through qualified partners.

How do you handle surface finishing and heat treatment?

Anodizing, plating, powder coating, painting, brushing, and polishing can be bundled, along with heat treatment through qualified partners. In-house ovens reach 500 °C; titanium stress relief above that is outsourced and stated plainly.

How do MOQ, lead times, and ordering work?

Commercial terms should be stated up front, not discovered mid-order. The questions here cover the minimum order, the lead time logic, and what a quote actually needs to be accurate, because a quote built on a vague drawing is a guess, not a price.

What is your minimum order quantity?

The MOQ is 1 piece. Prototype and single-part orders are accepted as well as production runs, so you can validate a design and iterate before committing to volume.

What are your typical lead times?

Roughly 3, 7, or 30 days depending on part complexity and process steps. Simple parts ship in about 3 days; complex parts running 10–20 steps or requiring surface finishing fall into the 30-day tier.

How do I get a quote?

Email a STEP, IGES, or 2D drawing with material and finishing notes to [email protected]. The team returns a design-for-manufacturing review and quote, usually within one business day.

What information do you need for an accurate quote?

A 2D or 3D drawing, the material specification, the surface treatment or finishing, the order quantity and annual volume, and the tolerance standard. These five items let the DFM review be specific instead of generic.

Do you provide a design-for-manufacturing review?

Yes. A drawing sent to [email protected] gets a DFM review that flags dimensions which cannot be reliably held, before cutting begins — the review that separates a real machining service from a quoting desk.

How do payment, packaging, and shipping work?

Payment and packaging are the practical terms that keep a job moving once it starts. These questions cover the standard terms and the visibility you have during the run, so there are no surprises between the deposit and the delivery.

What are your payment terms?

T/T or L/C, with 30–50% prepaid and the balance before shipment or against a copy of the bill of lading. Other terms are negotiable, and the terms are agreed in writing before cutting begins.

Do you provide custom packaging and bar coding?

Yes. Custom packaging and bar coding are available, and a weekly status report is provided for open orders, so you have visibility into the job while it runs rather than after it ships.

What happens after the order — traceability, reports, and remakes?

The relationship does not end at shipment. The questions here cover the two things buyers care about most after parts arrive: whether the parts can be traced, and what happens if one fails. A supplier's answer to the remake question tells you how it treats a problem after it has your money.

Will you arrange a remake for failed parts?

Yes. If a part fails and the failure is confirmed, a remake is arranged, with the remake and shipping cost covered. Pictures of the issue help identify the root cause and prevent it on the next order.

How are parts traced back to raw material?

The MES/ERP system records raw material source, process parameters, machine data, batch, machining time, operator, and inspection results on every lot, so a single part can be traced end to end on demand.

What languages does the sales team speak?

English, Japanese, Portuguese, Spanish, and French. The fastest response for urgent requests is around 30 minutes, so you are not left waiting on a time-sensitive question.

What industries do you serve?

Automotive, robotics, electronics, medical, and automation machinery and equipment, serving 100+ domestic and overseas customers with an annual output of more than 1,000,000 parts.

How do I know parts will be consistent across a large order?

Consistency comes from statistical process control, not from one good sample. The MES/ERP system tracks every lot, and SPC charts on key characteristics hold Ppk ≥ 1.67 initial, so drift is corrected before it leaves the tolerance band.

How do you handle prototypes and samples?

The MOQ is 1 piece, so prototypes and single-part orders are accepted as well as production runs. The first article ships with an inspection report listing measured values, so you validate the design before committing to volume.

Do you provide material certificates with the shipment?

Yes. Incoming material is XRF-checked against the mill certificate, and CMM reports, SPC charts, and material certificates ship with the parts, giving the buyer documented evidence of what was received.

What file formats do you accept for drawings?

STEP, IGES, and 2D PDF or DXF files. For complex parts, both a 2D drawing and a 3D model are useful, because the 2D carries the tolerances and the 3D carries the geometry.

How do you protect customer intellectual property?

Sensitive paper files are stored in a secured space and electronic data on encrypted drives, with disposal handled responsibly. The code of conduct also covers confidentiality and intellectual property protection explicitly.

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 precision CNC machined 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 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). Intended 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). Intended 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). Intended 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). Intended for shafts, bushings, flanges up to ±0.002 mm.
• Wire EDM (5+) - Sodick AQ535L (550/350/300 mm travel, ±20° taper, 800 kg workpiece). Intended 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.

Standards referenced on this page

• ASTM B348/B348M-21 — Standard Specification for Titanium and Titanium Alloy Bars and Billets
• IATF 16949:2016 — Automotive quality management system standard
• ASTM B211/B211M-19 — Standard Specification for Aluminum-Alloy Rolled or Cold Finished Bar, Rod, and Wire