We machine C36000, C27400, and C28000 brass to ±0.005 mm on 127 CNC machines. Send your 3D file and get a quote with free DFM analysis in 12 hours. No minimum order quantity.
These are the four failures we hear about most often. Each one has a root cause you can check.
The first article passes, then the next 500 pieces slide out of tolerance. Free-machining brass moves with tool wear and thermal growth. Without in-process monitoring at fixed intervals, the drift is not visible until the parts are at your door. Rework or scrap follows. We monitor dimensions during the run to catch drift early.
A turned brass fitting with cross-drilled holes often carries a burr ring on the inside. Hand deburring removes the visual burr and leaves an edge that damages the mating part. Controlling burr formation needs correct feed, tool geometry, and a defined deburring step, not a quick pass with a scraper.
C36000 machines well and costs less. But it contains lead, and it corrodes faster in marine or high-humidity service. If your drawing calls out a general brass without naming the alloy, you may get free-machining stock where C27400 or C28000 is needed. The failure shows up in the field, not at incoming inspection.
You receive parts and a packing list. Nothing else. When a quality issue appears six months later, there is no record of what was measured or when. Without documented inspection data, every claim becomes a discussion instead of a check against numbers.
Brass is a good turning material. It only behaves well when you control the alloy choice, tool wear, and inspection loop.
We stock C101, C103, C110, C27400, C28000, and C36000. C36000 is the default for high-volume turning because it breaks chips cleanly and holds a good finish at higher feeds. For parts that touch water, salt spray, or food, we steer toward C27400 or C28000, which trade some machinability for better corrosion behavior.
The alloy choice changes your surface finish and your tool life. It also changes the price, so we tell you when a cheaper grade will work and when it will fail. If your drawing only says brass, we ask what the part contacts before we quote.
Holding ±0.005 mm on a turned brass part is not a machine specification. It is a process. We qualify the first article, then check critical diameters at set intervals during the run. If a dimension trends, the operator adjusts before the parts leave the machine.
Every batch gets 100% inspection before shipment. That covers raw material verification, in-process monitoring, and a final dimensional check. We can supply reports on request, and we keep the data so a future question has an answer.
For parts with a fine finish requirement, we can turn to Ra 0.2–0.8 μm. For general turned parts, Ra 0.8–1.6 μm is the normal working range, and Ra 1.6–3.2 μm covers as-machined surfaces where cosmetics do not matter.
Use this to decide before you send the file. We confirm during DFM review.
| Part feature | Recommended process | Why |
|---|---|---|
| Round, axial symmetry | CNC turning | Single setup, fast cycle, good concentricity |
| Cross-holes or flats on a turned body | Mill-turn center | One setup, no re-chucking error |
| Complex 3D contour on a turned blank | 5-axis machining | Reaches features a 3-axis setup cannot |
| Thin-wall tube under 1 mm | Turning with support | Prevents deflection during the cut |
| Prototype, 1 to 20 pieces | Turning from bar stock | No tooling cost, fast turnaround |
| 10,000+ pieces per year | Turning with bar feeder | Lower cycle time per part |
Turning is the core. These services cover the steps before and after it.
127 machines, including 16 mill-turn centers. Turned brass parts with cross-holes, flats, and slots often come off in one setup. That removes re-chucking error and shortens the schedule.
16 simultaneous 5-axis centers handle contoured brass parts and features that would need three or four setups on a 3-axis machine. Maximum processing size is 4,000 mm.
One part or twenty, turned from bar stock. No tooling cost. First articles ship in 3–5 days after drawing release, so you can test fit before committing to a run.
Nickel, zinc, silver, and gold plating. Bead blasting, tumbling, brushing, and polishing. Laser marking down to 1.5 mm character height for part numbers and traceability.
100% inspection before shipment. Raw material check, in-process monitoring, final dimensional check. Reports on request for your incoming quality file.
Turned brass parts can be assembled with mating components and packed as a kit. Useful when a sub-assembly arrives at your line and goes straight into production.
| Item | Specification |
|---|---|
| Maximum processing size | 4,000 mm |
| Large travel | 4,000 × 400 × 150 mm |
| Medium travel | 750 × 1,150 × 550 mm, 600 × 600 × 600 mm |
| Compact travel | 500 × 500 × 450 mm, 500 × 310 × 200 mm |
| Rotary table | Ø400 mm |
| Tolerance | ±0.005 mm (±0.0002 in) |
| Fine finish | Ra 0.2–0.8 μm |
| Working finish | Ra 0.8–1.6 μm |
| As-machined finish | Ra 1.6–3.2 μm |
| Minimum order | No MOQ, from 1 piece to 10,000+ |
| Quote turnaround | 12 hours with free DFM analysis |
| Production start | Within 24 hours of approval |
Certifications and machine counts only matter if they change what arrives at your dock.
That is ±0.0002 in. We hold it on turned brass features when the drawing defines the datum. We will tell you when a feature cannot hold it and why.
Our ISO 9001:2015 certificate covers documented process control. Raw material records, in-process checks, and final inspection are part of the workflow, not an add-on.
IATF 16949:2016 certification means our process control meets automotive requirements. Useful for brass terminals, connectors, and sensor housings.
ISO 13485:2016 covers medical device quality management. Brass parts for medical instruments and fluid handling fall under this scope.
ISO 27001:2022 covers information security. Uploads are secure and confidential. We sign an NDA on request before you send the drawing.
Send a STEP file and get a quotation plus free DFM analysis within 12 hours. Production can start within 24 hours after approval.
Brass pins, contacts, and RF connectors need controlled diameter and clean plating. We turn to ±0.005 mm and finish with nickel or gold plating for solderability.
Brass terminals and sensor housings must repeat across high-volume runs. IATF 16949 process control and in-process monitoring keep the dimensions stable from first article to last.
Fluid-handling brass components need burr-free internal passages and documented inspection. We machine, deburr, and verify before shipment under ISO 13485:2016 scope.
Brass fittings, bushings, and valve bodies often combine turning with cross-drilling. Mill-turn centers complete them in one setup, which holds concentricity between the bore and the threads.
We hold ±0.005 mm (±0.0002 in) on turned brass features when the drawing defines a clear datum and the feature can be reached in one setup. That covers most diameters, bores, and shoulder lengths.
Some features cannot hold that number. A thin wall under 1 mm will deflect under cutting force. A deep small bore may need a reaming step. We flag these during DFM review and tell you what tolerance is realistic before you commit to a run.
C36000 is the standard choice for high-volume turning. It machines fast, breaks chips cleanly, and takes a good finish. Use it for fittings, connectors, and general turned parts.
C27400 and C28000 are better when the part sees water, salt spray, or food contact, because they trade machinability for corrosion resistance. C101, C103, and C110 suit electrical and thermal duty. If your drawing just says brass, we ask what the part contacts before quoting.
No. Send a 3D file and we return a quotation with free DFM analysis within 12 hours. The analysis covers alloy choice, tolerance feasibility, and any feature that will be hard to machine.
There is no minimum order quantity. One prototype or a 10,000-piece run both go through the same quote process.
Burr control starts with the cutting parameters and tool geometry, not with a scraper at the end. We choose feeds and speeds that reduce burr formation, then define a deburring step that removes the remaining edge without changing the hole size.
For medical and fluid-handling parts, we inspect the internal passages before shipment. A burr ring that survives into your assembly can damage a mating seal. It is cheaper to remove it here.
Yes, on request. Every batch gets 100% inspection before shipment, covering raw material verification, in-process monitoring, and a final dimensional check.
If you need documented dimensional data for your incoming quality file, tell us at the quote stage so we set up the report format before the run starts. Adding it later means re-measuring parts that already passed.
Quotation and DFM analysis come back within 12 hours. Production can start within 24 hours after you approve the quote. Parts ship in 3–5 days.
For larger runs or parts with plating, the schedule depends on the finishing step. We confirm the date at the quote stage rather than after the order.
Uploads are secure and confidential. We hold ISO 27001:2022 certification for information security, and we sign an NDA on request before you send the drawing.
If your project needs a signed agreement first, ask for it at the contact stage. We will not share your files or use your parts in marketing material without written permission.
Yes. The key is completing the bore and the thread in one setup, or on a mill-turn center that keeps the part on the same axis. Re-chucking between operations is what breaks concentricity.
For parts with a Ø400 mm rotary table requirement or a long axial bore, we plan the setup during DFM review. If the drawing tolerance is tighter than the setup can hold, we say so before the run.
Upload a STEP or DXF file and get a quote with free DFM analysis in 12 hours. No minimum order quantity. Uploads are secure and confidential.
12-hour quoteFree DFM analysis100% inspectionNo MOQNDA 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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