FAQs

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

The floor behind this guide runs 100+ CNC machines on 6,800 m² at No. 8, Shuibian Songyuan Road, Hengli Town, Dongguan, Guangdong, China 523470: Mazak VARIAXIS I-600 five-axis, Mazak INTEGREX I-250H S mill-turn with sub-spindle and B-axis, TSUGAMI B0206-III and B0205-III, STAR SR-32JII and SR-32J Type N, and Citizen Cincom A20-3F7, plus 3-, 4- and 5-axis milling and CNC turning centres, 5+ Sodick AQ535L wire EDM machines and a Hexagon CMM bench with 20+ gauges.

This floor holds ±0.003 mm on CNC milling, ±0.002 mm on CNC turning, and ±0.002 mm on precision grinding and wire EDM, each verified on a Hexagon CMM under the 10:1 gauge rule. Capability runs Ppk ≥ 1.67 initial on key characteristics and Cpk ≥ 1.33 in production. Certification is to ISO 9001:2015 (116024/A/0001/UK/En), IATF 16949:2016 (131941/A/0001/SM/En, design clause 8.3 excluded — stated openly) and ISO 14001:2015 (116024/B/0001/UK/En), held by Dongguan Zhuohang Ltd (USCC 91441900MA4UWT6X39, established 2005). Buyers in 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 served from China, with worldwide shipping. Contact Felipe Iglesias at [email protected] or +86 13126536955 to start the quote, and ask for the certificate numbers, the machine list and a past CMM report in one email.

Routing decision — the machine that fits the part, not the machine that is free

The routing decision on a CNC part is the decision that sets the cost and the tolerance, and if you ask for the routing in the quote, you see which machine the part runs on. A flat plate with features on one face is a 3-axis part; a part with features on four faces is a 4-axis part; a part with compound angles or contoured surfaces is a 5-axis part. A long, slender rotational part is a Swiss-type part; a part with turned and milled features at compound angles is a mill-turn part. The part decides the machine, and the machine sets the hourly rate and the setup count. The facility behind this guide runs 3/4/5-axis milling at ±0.003 mm, Swiss-type turning at ±0.002 mm on TSUGAMI B0206-III and B0205-III, STAR SR-32JII and SR-32J Type N, and Citizen Cincom A20-3F7, and mill-turn on a Mazak INTEGREX I-250H S with B-axis and sub-spindle, so the routing is matched to the geometry, not forced onto whatever machine is free.

The setup count is the other lever. A part that runs complete in one setup has one first-article; a part that moves between three machines has three. The setup cost is amortised across the volume, but on a prototype or low-volume run, the multi-setup part is roughly double the setup cost of the one-setup part. The tolerance bands — ±0.002 mm turning, ±0.003 mm milling and grinding — are held on Hexagon CMM with Ppk ≥ 1.67 initial on key characteristics and Cpk ≥ 1.33 in production, under ISO 9001:2015, IATF 16949:2016 (design clause 8.3 excluded), and ISO 14001:2015, on 100+ CNC machines at 6,800 m² in Dongguan. Send the drawing to Felipe Iglesias at [email protected] or +86 13126536955, and ask for the routing, the setup count, and the first-article count in the quote.

Quote breakdown — the four lines that hold at audit

your quote should break out the material, the setup, the cycle, and the inspection as separate lines, and the routing should state the axis count and the setup count. A quote that comes back as a single lump number is hiding the assumptions. 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), held by Dongguan Zhuohang Ltd (USCC 91441900MA4UWT6X39, established 2005). Send the drawing to Felipe Iglesias at [email protected] or +86 13126536955, and ask for the four-line breakdown.

Which materials turn best?

Free-machining grades lead the field: 303 stainless, 12L14 steel, C360 brass, and 2011/6262 aluminum all break chips cleanly and hold fine finishes. Harder, tougher alloys — 316, 17-4PH, 4140, titanium — still turn well but at lower speeds with more tool wear.

Which materials can be turned?

Aluminum, stainless steel, carbon and alloy steel, brass, copper, titanium, and magnesium, plus engineering plastics including ABS, POM, nylon, PTFE, and PEEK — each matched to the cutting strategy it needs.

How does the material set the price and lead time?

Why does the material change the price?

Because the material sets the cutting speed and tool wear. A free-machining grade like 303 or C360 turns fast and cheap, while 316 or titanium runs slowly and wears tools faster, so the same geometry costs more in a difficult alloy.

What are the lead times?

Roughly 3, 7, or 30 days depending on part complexity and the number of process steps. Simple parts ship in about 3 days; parts with heat treatment, surface finishing, or many operations fall into the 30-day tier.

What are the MOQ and tolerances?

What is the minimum order quantity?

The MOQ is 1 piece. Single prototypes, small validation batches, and production runs are all accepted, so you can prove the material and the design before committing to volume.

What tolerance can CNC turning hold?

±0.002 mm for turning, and ±0.002 mm for precision grinding. Critical diameters are verified on Hexagon CMMs, with process capability of 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.

Which process suits which material and shape?

Swiss-type turning for slender free-machining parts, standard CNC turning for general round parts, mill-turn for round parts with milling features, and grinding for hardened or tight-tolerance surfaces. The material and the geometry pick the process together.

How is the material verified and traced?

Every incoming lot is checked by XRF against its mill certificate before it reaches a machine, and material certificates ship with the parts. A mislabeled alloy is caught at the door, not discovered in the finished part.

Are the parts traceable?

Yes. The MES/ERP system records raw material source and usage, process parameters, machine data, production batch, machining time, operator, and inspection results, so a non-conformance can be isolated to the exact lot.

What backs the quality and the factory?

Which certifications does the factory 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 this is a build-to-print manufacturer.

What secondary finishing is available?

Anodizing (standard and hard), zinc, nickel, silver, gold and chrome plating, powder coating, painting, brushing, polishing, and heat treatment — bundled so you receive finished parts, not blanks.

Can I visit or audit the factory?

Yes. Visits and audits are welcome at No. 8, Shuibian Songyuan Road, Hengli Town, Dongguan (GPS 23.048947, 113.990605). You can inspect the machines, the inspection bench, and the documentation.

How do I get a quote and documentation?

What do you need for an accurate quote?

The exact alloy rather than a generic metal or steel, a 2D drawing with tolerances and material called out, the quantity and target date, and any heat treatment or surface finishing requirements.

How do I get a quote?

Email a STEP or IGES file plus a toleranced 2D drawing with the material called out to [email protected]. A design-for-manufacturing review and quote are returned, flagging any manufacturability issues before you commit.

Do inspection reports ship with the parts?

Yes. CMM inspection reports, SPC charts, and material certificates ship with the parts on request, giving documented evidence of what was measured and what it was made from.

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 CNC turned 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.

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). Typical work: 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). Typical work: 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). Typical work: 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). Typical work: shafts, bushings, flanges up to ±0.002 mm.
• Wire EDM (5+) - Sodick AQ535L (550/350/300 mm travel, ±20° taper, 800 kg workpiece). Typical work: 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.

Frequently Asked Questions

Standards referenced on this page

• ASTM A582/A582M-12 — Standard Specification for Free-Machining Stainless Steel Bars
• ASTM A276/A276M-17 — Standard Specification for Stainless Steel Bars and Shapes
• ISO 9001 — Quality management systems — Requirements