Turned and milled brass parts from prototypes to 10,000+ piece runs. We quote in 12 hours, hold ±0.005 mm on critical features, and inspect every part before it ships from Dongguan.
Most brass jobs fail for reasons that have nothing to do with the alloy. They fail because a shop did not plan for the material.
Free-cutting brass cuts fast, but wrong feeds and dull tooling smear the flanks of fine threads. A 0.5 mm pitch thread on a Ø6 mm fitting is scrap once the crest is torn. We set feed per revolution per alloy, not per shop habit.
Brass is soft. Parts that tumble against each other or sit loose in a bin arrive with dents that no polishing removes. We bag and separate turned parts and control the finish step by step, not as one batch.
Thin brass walls move when the tool pushes. A 0.8 mm wall on a connector shell can bow 0.05 mm if the roughing pass is too heavy. We leave even stock and take light finishing passes on both sides.
You send a STEP file, hear nothing for a week, then get a price with no DFM notes. If a corner radius cannot be cut or a hole is too deep for the drill, you should hear it before the first chip, not after delivery.
Brass rewards a shop that controls speed, chip evacuation and handling. Here is what we do differently.
Most brass parts are round. Fittings, bushings, valve bodies, terminals and adapters all start on a lathe, and many of them never leave it. Our 16 mill-turn centers cut the OD, bore and threads, then mill flats, slots and cross holes in the same setup. One chucking means one datum, so the bore and the cross hole stay concentric instead of drifting against each other.
Free-cutting grades like C36000 run at high surface speed with a good chip. We set feed per revolution so the chip breaks instead of wrapping the tool, and we keep coolant directed at the cutting edge to stop built-up edge from dulling the finish.
Flat brass parts need different care. Plates, busbars, manifold blocks and RF shields are often thin, and thin brass vibrates. We hold them on vacuum plates or in soft jaws machined to the part profile, take light axial cuts, and climb mill the finishing pass so the edge does not burr.
Drilling is where brass punishes a careless program. A standard 118° drill grabs in soft alloy; we use lower helix angles and modified point geometry, peck shallow, and back the tool out fast so the chip clears. Deep holes get pilot drilled first.
Pick the grade before you pick the tolerance. Machinability and conductivity trade off against each other.
| Grade | Typical use | Machinability |
|---|---|---|
| C36000 free-cutting brass | Fittings, valves, threaded parts | Excellent |
| C27400 / C28000 | Architectural and hardware parts | Good |
| C110 copper | Busbars, electrical contacts | Fair, gummy |
| Beryllium copper | Spring contacts, RF pins | Fair, abrasive |
| C101 / C103 | High-conductivity electrical parts | Fair |
One shop for round parts, flat parts and assemblies. Most jobs ship in 3–5 days.
Threaded brass fittings from Ø5 mm to Ø120 mm. We cut NPT, metric and BSP threads and gauge them before shipping.
Sleeve bearings with controlled bore tolerance and oil grooves. Bores held to ±0.005 mm where the shaft demands it.
C110 and beryllium copper contacts, spring pins and terminals. Plating options include silver, gold and electroless nickel.
Brass and copper shield cans, cavity blocks and gaskets. Tight flatness on mating faces keeps the shield seated.
Multi-port blocks with cross-drilled passages. We pressure-test only when the drawing calls for it.
Knobs, plates, hinges and trim in C27400 or C28000, polished or brushed and clear-coated to stop tarnish.
Numbers you can check against your drawing before you send it.
| Item | Range |
|---|---|
| Maximum part size | 4,000 mm |
| Tolerance | ±0.005 mm |
| Surface finish | Ra 0.2–0.8 μm fine |
| Threads | M1.6 to M60 and NPT |
| Minimum wall | 0.5 mm in free-cutting brass |
| Order quantity | 1 piece to 10,000+ |
| Quotation | Within 12 hours with DFM notes |
| Shipping | 3–5 days after approval |
Critical features are measured on a CMM and reported. If your bore needs ±0.005 mm, you get the number, not a promise.
Send a STEP file or a sample. We flag thin walls, deep holes and undercut corners before you commit to tooling.
Raw material check, in-process monitoring and final inspection. Reports on request.
One prototype or ten thousand parts. The setup is the same; only the run time changes.
ISO 9001:2015, IATF 16949:2016, ISO 13485:2016 and ISO 27001:2022 cover the plants that cut your parts.
Our technicians and programmers have cut brass and copper since 2011, across three plants and 7,600 m² of floor space.
Contacts and pins need tight pitch and clean plating. We hold ±0.005 mm on pin diameter and finish with silver or gold.
Terminals and busbars in C110 copper need low resistance and no burrs at the mating face. Edge break is specified, not left to chance.
Brass manifolds and fittings are cleaned, inspected and documented. ISO 13485:2016 systems govern the process.
Valve bodies and bushings run in 10,000+ part batches. Tooling is set once and monitored by in-process probing.
Start with the function. If the part is threaded or turned and strength is not critical, C36000 free-cutting brass gives the best finish and the lowest cycle time.
If the part carries current, switch to C110 or C101 copper. The trade-off is gummy chips, slower feeds and a rougher as-machined surface.
Yes, down to about 0.5 mm in free-cutting brass. Thin walls move when the tool pushes, so we leave even stock and take light finishing passes on both sides rather than one heavy cut.
For parts under 0.8 mm wall, expect a longer cycle time. The stock removal has to be staged or the wall bows and the part will not fit.
±0.005 mm on critical features, measured on a CMM and reported when you ask. General dimensions typically sit inside ±0.01 mm.
Tolerance is not free. A ±0.005 mm bore on a deep small hole costs more than the same bore on a short one. Tell us which features matter and we will concentrate the tight work there.
Quotation with DFM analysis comes back within 12 hours of receiving a STEP file or a sample. Production can start within 24 hours of approval.
Parts normally ship in 3–5 days. That depends on quantity, finishing and material availability, so treat it as the planning number rather than a fixed date.
No. We run one prototype or 10,000+ parts. The setup is the same; only the run time changes.
Small runs still get the same 100% inspection. We do not skip checks because a batch is small.
As-machined brass sits around Ra 1.6–3.2 μm. Fine finishing gets to Ra 0.8–1.6 μm or Ra 0.2–0.8 μm where the drawing needs it.
For appearance parts we offer bead blasting, tumbling, brushing and polishing, plus plating in electroless nickel, zinc, silver and gold. Laser marking needs a minimum character height of 1.5 mm.
Yes. Brass oxidizes in humid air, and parts can arrive discolored if they sit unprotected. We can apply a clear protective treatment before packing.
If the part is plated, tarnish is not a concern on the plated surfaces. Tell us the storage conditions and we will suggest the right protection.
Yes. Send the sample and we will measure it, build the drawing and quote from that geometry. You get a 3D model back with the price.
This adds a day or two at the front end, but it removes the risk of quoting the wrong geometry.
Upload a STEP file or a drawing. You get a quote and a DFM review within 12 hours, no minimum order, and every part inspected before it ships.
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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