Straight answers on quoting, tolerances, materials and lead times. Written by the engineers who run 127 CNC machines in Dongguan and Singapore, so you can decide what to send and what to expect back.
Most delays in custom CNC work start long before the spindle turns. Here is what we see on incoming jobs.
mm all over, then one bore is called out at ±0.005 mm. A shop that does not ask which features actually matter will quote the loose number and miss the tight one. You get parts that assemble badly, or a second setup billed as a new job.
A solid model shows nominal geometry, not what is acceptable. Without a 2D drawing or a tolerance note, the shop guesses. Guessed tolerances come back as scrap, rework, or a call asking what you meant.
Thin walls deflect under cutting force. On aluminum they chatter, on PEEK they flex and spring back. If the design needs a 0.3 mm wall in a 60 mm pocket, expect to pay for slow passes or a redesign.
As-machined is Ra 1.6–3.2 μm. A sealing face needs Ra 0.8–1.6 μm or better. Skipping that note means sealing surfaces that leak, or an extra finishing operation you did not budget for.
Three steps, no account setup, no minimum order.
Upload a STEP, IGES, or native CAD file with a 2D drawing if you have one. We read the geometry, check feature accessibility against our machine travels, and flag anything that will not cut cleanly. You get a price and a written DFM analysis within 12 hours.
The DFM note is not a sales document. It lists what we would change and why: a corner radius a 3 mm tool cannot reach, a thread too close to a wall, a datum that makes the part hard to hold. You decide whether to accept it.
Once you approve the quote and the DFM changes, we release the job to the floor. Production can start within 24 hours. Parts ship in 3–5 days for most geometries, and the historical late-delivery probability on our jobs is below 2%.
Machine choice follows the part, not the schedule. A 4,000 × 400 × 150 mm travel handles long extrusions and frame rails. A Ø400 mm rotary table on a simultaneous 5-axis center cuts impellers and angled ports in one setup instead of four.
Same geometry, different cost and lead time. Match the route to quantity and tolerance.
| Route | Best for | Tolerance reach |
|---|---|---|
| 3-axis milling | Prismatic parts, plates, open pockets | ±0.005 mm on one face |
| 4-axis milling | Parts needing index positions | ±0.005 mm across 4 faces |
| 5-axis simultaneous | Impellers, angled ports, contoured surfaces | ±0.005 mm, one setup |
| Mill-turn | Shafts and bodies with turned and milled features | ±0.005 mm, fewer setups |
| Rapid prototyping | Design checks before tooling | Functional, not always final tolerance |
| Die casting + machining | High volume housings and frames | Machined after casting |
Machining, finishing, and low-volume casting in the same plant, so a part does not travel between vendors.
16 simultaneous 5-axis centers for contoured and angled features. One setup means fewer datum shifts and tighter stack-up on complex parts.
12 four-axis mills and 27 three-axis machines for prismatic work, plates, and brackets. The right machine keeps the hourly rate down.
16 mill-turn centers handle shafts, bushings, and bodies with both turned and milled features, without re-chucking.
Functional prototypes for fit and testing before you commit to production tooling. Same drawing, same material where possible.
Enclosures, brackets, and housings. Castings are machined in-house so the critical faces hold tolerance.
Anodizing, plating, powder coating, bead blasting, and laser marking. Minimum character height 1.5 mm for marked parts.
A short list of what we cut most. Other grades are quoted on request.
| Material group | Common grades | Typical use |
|---|---|---|
| Aluminum | 6061-T6, 7075, 5083, ADC12 | Housings, brackets, heat sinks |
| Stainless | 303, 304, 316L, 17-4PH | Food contact, medical, marine |
| Steel | 1018, 4140, 4340, A36 | Shafts, plates, structural parts |
| Copper and brass | C110, C36000, beryllium copper | Bus bars, RF parts, connectors |
| Titanium and special | TC4 (Ti-6Al-4V), Inconel, AZ31B | Aerospace, high-temp, lightweight |
| Plastics | POM, PEEK, PC, HDPE, carbon fibre | Insulators, jigs, low-friction parts |
Fifteen years of machining, four certifications, and inspection built into every job.
Three wholly-owned plants and 7,600 m² of manufacturing space. Process knowledge that comes from running the same part families for years.
Also written as ±0.0002 in. We hold it on features that need it, and tell you when a looser callout saves money.
Sixteen simultaneous 5-axis centers, twelve four-axis mills, twenty-seven three-axis machines, and sixteen mill-turn centers.
Raw material check, in-process monitoring, and final inspection on every job. CMM reports on request.
ISO 9001:2015, IATF 16949:2016, ISO 13485:2016, and ISO 27001:2022. Audited, not self-declared.
Machinists, programmers, and inspectors. The same people who quote your part can explain why a feature is hard to cut.
Joints and frames need one-setup accuracy so links line up without shimming.
Cleanable surfaces, traceable material, and documented inspection.
Flatness and pocket depth hold so boards and connectors seat correctly.
PPAP-level documentation and repeatability across production runs.
A STEP or IGES file is enough to start. If tolerance, finish, or thread class matters, send a 2D drawing as well, because a solid model only shows nominal geometry.
If you only have a sketch, send it. We will tell you what is missing before quoting instead of guessing and billing you later.
±0.005 mm, which is ±0.0002 in. That is achievable on features we can reach with a rigid setup, on the machines listed above.
Tight tolerances cost time. If a ±0.05 mm callout does the job, we will say so, because the price difference is real.
As-machined is Ra 1.6–3.2 μm. Fine finishing reaches Ra 0.8–1.6 μm, and Ra 0.2–0.8 μm on request for sealing faces and bearing fits.
Anodizing, electroless nickel, zinc, silver and gold plating, powder coating, black oxide, bead blasting, polishing, and laser marking are all handled in-house or by qualified finishers we control.
None. We run from one prototype to 10,000+ part runs on the same drawing.
A single part still goes through the same inspection steps. You pay for the part, not for a batch you do not need yet.
Quotation and free DFM analysis come back within 12 hours. Production can start within 24 hours of approval, and parts ship in 3–5 days.
On our jobs, the historical late-delivery probability is below 2%. We do not promise dates we cannot hold.
Uploads are secure and confidential, and we sign an NDA on request. We do not publish customer drawings, names, or part photos without written permission.
If your program requires it, we can restrict file access to the engineers on that job.
That is what the DFM note is for. We flag internal corners a tool cannot reach, walls too thin to hold, and holes that need a second setup, and we suggest a change.
You decide whether to accept the change. We never quietly alter a drawing to make a part easier to cut.
Yes. Parts ship from Dongguan, China, and from our Singapore factory at No.3 Joo Koon Circle, Singapore 629032, by international express.
Inspection reports travel with the shipment when you ask for them, so incoming inspection on your side is faster.
Upload your files and an engineer reviews them before the price goes out. No minimum order, no account setup.
12-hour quote100% inspectionNo minimum orderNDA on request
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Upload your 3D model or 2D drawing and get a quotation with a free DFM analysis. Maximum processing size 4,000 mm.
CNC Metals 13 grades
CNC Plastics 10 grades
Machines & processes 12 options
Surface & post-processing 10 options
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