The shop behind this delrin 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.
Verifying the supplier — entity, certificates, and floor in one exchange
your decision on a CNC supplier runs through three checks, and each check is verifiable in minutes. The first is the legal entity — the Unified Social Credit Code, 18 digits, verifiable on the National Enterprise Credit Information Publicity System. Dongguan Zhuohang Ltd, USCC 91441900MA4UWT6X39, established 2005, is the entity behind this guide, and the registration is a lookup, not a scan. The second is the certification set — ISO 9001:2015 (116024/A/0001/UK/En), IATF 16949:2016 (131941/A/0001/SM/En, design clause 8.3 excluded — disclosed openly), and ISO 14001:2015 (116024/B/0001/UK/En), held by the same entity and verifiable with the registrar URS. The third is the floor — 100+ CNC machines on a 6,800 m² plant at No. 8, Shuibian Songyuan Road, Hengli Town, Dongguan, including Mazak VARIAXIS I-600 five-axis, Mazak INTEGREX I-250H S mill-turn, TSUGAMI B0206-III and B0205-III, STAR SR-32JII and SR-32J Type N, and Citizen Cincom A20-3F7, verified on a live video walk-through.
The tolerance bands held — ±0.003 mm on CNC milling, ±0.002 mm on CNC turning, ±0.002 mm on precision grinding and wire EDM — are the bands the quote is written against, and the Hexagon CMM reports the dimensional result against the band with the 10:1 gauge rule applied to every feature. The capability indices — Ppk ≥ 1.67 initial on key characteristics, Cpk ≥ 1.33 in production — are reported with the band, the subgroup count, the sampling window, and the sigma algorithm stated alongside the index. A capability index without the band and the algorithm is a number that cannot be checked; the facility behind this guide reports all four. The service area spans 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. Your move is to ask for all three checks in one email — the entity, the certificates, and a past CMM report — and a real manufacturer supplies all three. Contact Felipe Iglesias at [email protected] or +86 13126536955.
- 100+ 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.
- Titanium: Titanium cuts at a low speed not because it is hard but because it is a poor conductor and chemically reactive at cutting temperature.
- Grades in regular use: POM-H homopolymer for stiffness, POM-C copolymer for chemical and hot-water resistance.
- Incoming stock is verified against the mill certificate before it is cut.
The notes below are written for you who wants to understand Delrin before the quote, so the material's real behaviour - not a brochure claim - sets your expectations on cost, tolerance and lead time.
What Delrin is and why it is chosen
Delrin - the DuPont name for POM acetal - is the engineering plastic that fills the gap between a metal that is overkill and a commodity plastic that is too soft. It combines high stiffness, low friction, natural lubricity and excellent dimensional stability, and it absorbs far less moisture than nylon, so it holds its size in humid conditions. Gears, bearings, bushings, rollers and precision plastic parts are where it earns its keep.
Homopolymer or copolymer
POM-H, the homopolymer, has the highest strength, stiffness and hardness. POM-C, the copolymer, trades a little stiffness for better chemical and hot-water resistance and slightly better dimensional stability. The distinction matters in service: a part in hot water or aggressive chemicals leans copolymer, a dry high-load gear leans homopolymer. Naming the grade - or at least the service conditions - lets the shop pick correctly instead of guessing.
Machining, tolerance and heat
Delrin machines cleanly with sharp tools and holds a good surface. The one discipline is heat: it softens around 175°C, so an overheated cut or a dull tool smears the surface, and thick sections are annealed to relieve internal stress. The shop holds the drawing on a Hexagon CMM, and the anneal-before-finish sequence is what keeps a nominally in-spec plastic part from drifting later.
Cost, finishing and lead time
Delrin is economical and fast to run, so a quote is mostly cycle time. MOQ is 1 piece and lead times run roughly 3 / 7 / 30 days. Send the drawing to Felipe Iglesias at [email protected] or +86 13126536955 and ask for the grade recommendation - POM-H or POM-C - alongside the quote.
The notes below are the design and verification rules a Delrin buyer should check before the quote, so the drawing and the certificate are consistent.
Design rules for Delrin
Delrin machines cleanly, and the design rules are mostly about heat and stress. Keep walls reasonably uniform so they do not sink, remember the material softens around 175 C so it stays out of sustained heat, and for a load-bearing thread use a metal insert rather than the plastic itself. Thick sections should be annealed to relieve internal stress, otherwise a part that measures in spec on day one can drift after machining. If you call out the critical faces and the flatness, you get a part that stays stable.
When Delrin is the right call
Reach for Delrin when a metal part is overkill and a commodity plastic is too soft - gears, bearings, bushings and rollers that need stiffness, low friction and dimensional stability below about 100 C. Against nylon, Delrin absorbs far less moisture so it holds its size in humidity; against PEEK, Delrin is a fraction of the cost but gives up the temperature and chemical range. If you match the plastic to the service temperature and the load, you get the performance without paying for a higher grade than the part needs.
Verifying a Delrin supplier
Confirm the grade - POM-H homopolymer for stiffness, POM-C copolymer for chemical and hot-water resistance - because the two behave differently in service. Ask whether thick sections are annealed, and ask for the material specification with the quote. Delrin is economical to run, so a supplier that is vague about the grade or skips the anneal is cutting a corner that shows up later as a part that moved. If you ask the two questions, you lock the grade and the process in one exchange.
Delrin at a glance
POM acetal with high stiffness, low friction and low moisture absorption, softening around 175 C. Grades: POM-H homopolymer for stiffness, POM-C copolymer for chemical and hot-water resistance. Tolerance held to the drawing on a Hexagon CMM, with thick sections annealed to relieve internal stress. Typical parts: gears, bearings, bushings, rollers and precision plastic parts. Lead time 3 / 7 / 30 days, MOQ 1 piece, certification to ISO 9001:2015, IATF 16949:2016 and ISO 14001:2015.
De-risking a first order
A trial order of a few pieces is the cheapest insurance you can buy — it proves the routing, the tolerance and the paper trail on a small batch before the volume order locks in. One floor, one quality system, one accountable party, whether the run is a single part or a full production lot, so what the trial confirms is what production repeats.
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.
Not sure this is the right process?
Send the model and the drawing and get a straight answer on whether this route is the right one, including where a design change would cut cost. Reach Felipe Iglesias at [email protected] or +86 13126536955.
Frequently Asked Questions
Where do I start with Delrin?
Send the drawing and the volume to Felipe Iglesias at [email protected] or +86 13126536955, and ask for the material recommendation alongside the quote. MOQ is 1 piece.
Do you sign NDAs before reviewing drawings?
Yes. Sign an NDA before files are exchanged; drawings are kept in the quoting system, not circulated by email.
What happens if the first article does not conform?
In short, The nonconformance is documented and the corrective action is agreed before any further parts are made. Whether the replacement cost sits with the plant or the customer depends on where the deviation came from, which is why the revision and the drawing standard are confirmed in writing at the start.
Does titanium cost more to machine than aluminium?
Usually yes, and the reason differs by material: for titanium it is cutting speed and tool consumption, for stainless it is cycle time and work-hardening management. The lever that matters most is usually design depth rather than process choice.
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 set feature by feature when we quote rather than guessed from a single quoted figure.
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.
Do you certify Delrin material?
Yes. Material certificates are supplied with the parts and incoming stock is checked against the mill certificate — composition by XRF, hardness where specified. Traceability is per heat or per batch as the certificate defines it.
Continue reading: Machining Services · 3 Axis Machining Services · 4 Axis Machining Services
Standards referenced on this page
- ASTM B348/B348M-21 — Standard Specification for Titanium and Titanium Alloy Bars and Billets
- ASTM A276/A276M-17 — Standard Specification for Stainless Steel Bars and Shapes
- ISO 9001 — Quality management systems — Requirements