Progressive die stamping of brass terminals, eyelets, contacts and hardware — dies built in our own tool room, run on 21 presses from 25 to 110 tons at up to 300 SPM, held to ±0.005 mm on piloted features.
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PARTS WE STAMP
Brass gets specified for current-carrying parts, light contact springs and cosmetic hardware. These four families cover most of the brass metal stamped parts that run here, and each one carries its own die approach, plating route and inspection plan. On stamped brass parts the plating call-out usually decides the die layout, not the other way round.
Ring and spade terminals, connector pins, eyelets, lugs and contact bridges from C26000 cartridge brass and C26800 yellow brass. Progressive dies carry piercing, forming and in-die tapping, so a tapped terminal leaves the press finished instead of going out for a second operation.
Brass carries light contact force well, but it is not a spring alloy. Where a clip must hold force over millions of cycles we move the design to phosphor bronze or beryllium copper at DFM and say so — rather than quoting brass and letting the contact relax in the field.
0.2–0.5 mm brass draws into shallow cans, covers and small enclosures with clean radii and predictable solderability. It is heavier than aluminum but easier to solder and holds tighter corners, which is why RF cans and hand-soldered assemblies still specify it.
Escutcheons, trim rings, fasteners, plumbing fittings and small lock components — parts the customer and the end user both see. The visible face runs away from the stripper, the surface acceptance limit is agreed on the drawing, and plating or lacquer keeps the finish bright.
INSIDE THE PLANT
Real equipment and inspection floor from our Dongguan plant — 25–110T high-speed presses, in-house tool room, and a CMM lab running first-article inspection on every program.
WHERE BRASS GOES WRONG
Brass is forgiving on paper and unforgiving in a long run: temper drifts, thin edges burr, the surface tarnishes, the die starts to gall. These are the four failures we engineer out before the first production coil.
01
The Challenge
Two coils of the same C26000 grade behave differently in the same die when the temper differs — soft brass overbends less and marks more easily, half-hard and hard spring back further and crack at tight radii. A die cut for one temper is not the die for the other.
Our Solution
The die is compensated for the temper named on the purchase order, and the first parts run on the actual production coil, not a sample. Formed angles are released only after a first-article CMM report; when a customer changes temper mid-program, the bend stations are re-checked rather than assumed.
02
The Challenge
On thin brass the die clearance is a fraction of strip thickness, and a worn punch shows up as a burr on the contact face long before it shows up as a dimensional failure — the part still measures in tolerance and still fails at the customer.
Our Solution
The burr side is fixed on the die layout, clearance is controlled per station, and punch sharpening runs on a counted-stroke schedule rather than on a reject. Burr allowance and break-to-shear ratio are agreed at DFM and measured in first-article inspection.
03
The Challenge
Bare brass tarnishes, and a tarnished contact becomes a solderability and appearance complaint. Pre-plated strip and post-stamping plating are not interchangeable: one changes the die entry and forbids tumbling, the other needs the plating zone and masking defined before tooling.
Our Solution
The plating route comes from what the drawing needs, not from habit — pre-tinned or pre-plated strip where the die can be built gentle, post-plating with a qualified finisher and in-house inspection where the plating zone is selective. Silent drawings get a DFM question, not an assumption.
04
The Challenge
Brass galls against tool steel more readily than steel does. Galling caught late looks like a surface defect on the part and a dimensional drift on the station at the same time, so chasing it after the fact usually means scrapping a run.
Our Solution
Insert material and coating are chosen at die design, lubrication is matched to the strip surface, and forming stations are polished on a schedule. The same inspection loop watches surface and dimension, so the first sign of galling lands as a maintenance task, not a customer complaint.
HOW WE STAMP IT
These are the values we quote and inspect against on brass work — no ranges invented for marketing, and nothing the press cannot hold.
| Specification Parameter | What We Hold | How It Is Controlled |
|---|---|---|
| Strip thickness | 0.05–3.0 mm | Coil certificate + in-process thickness check |
| Positional tolerance | ±0.005 mm on piloted features | First-article CMM at 0.001 mm resolution |
| Stamping speed | up to 300 SPM | Press matched to the part, not to the calendar |
| Press fleet | 21 presses, 25–110 tons | Thin contacts on high-speed frames, heavy brass on larger presses |
| Dies | 100% designed and built in-house | 30 machining machines behind the tool room |
| Quality system | IATF 16949:2016 · ISO 14001:2015 | PPAP, material certificates, lot traceability |
| Inspection | 20 inspection stations | CMM, optical and profile, in-line CCD on critical features |
| Plating | tin, nickel, silver, gold | Qualified finishers, incoming inspection in-house |
Progressive die design, machining and assembly under one roof — the place springback, burr and galling are actually solved.
Thin brass contacts on the high-speed frames at up to 300 SPM; heavy brass from 1.5 to 3.0 mm on the larger presses.
First-article CMM at 0.001 mm, optical and profile for edges and radii, in-line CCD vision on the features the drawing controls.
Tin, nickel, silver and gold through qualified finishers, with incoming inspection and lot traceability kept in-house.
From Drawing to Production
Strip grade, temper, bend radii, burr side, tolerance stack and plating route settled before a die is cut.
Progressive layout with piercing, forming and in-die tapping combined; die machined and assembled in our tool room.
Run on the production coil, formed angles verified on the CMM, PPAP documentation raised.
Counted-stroke tool maintenance, in-line vision on critical features, SPC on the dimensions the drawing controls.
STRIP AND SUPPLY
We are a stamper, not a material distributor — we do not sell brass. What we do is pick the right strip form for the part and quote it as material plus conversion.
Soft, quarter-hard, half-hard and hard all run here, but they are not interchangeable for the same part. Soft temper suits deep forms and cosmetic faces; hard tempers hold their own spring and resist denting. A temper change mid-program is a die change, not a substitution.
Mill finish, pre-tinned and pre-plated strip are all workable. Pre-plated avoids a post-stamping plating step and the handling damage that comes with it, but demands gentler die entry and no tumbling; post-plating gives more freedom on the plating zone.
Either you supply coil to your own specification, or we procure the grade, temper, width and surface you name and quote material plus conversion with the mill certificate on file. If the grade is still open, we recommend between C26000, C26800, C27200, C28000 and C38500 before tooling.
Grades we run
BEFORE YOU SEND THE DRAWING
Eight things worth checking on a brass drawing before brass progressive stamping — the ones that decide whether the part is cheap or expensive to run.
INDUSTRY CASES
Oct 20 · 1 min read
Thin brass contacts for lamp-holder assemblies, stamped and shipped on weekly JIT releases to Mexico plants.
Oct 20 · 1 min read
Tapping moved into the die, ending the queue that stopped assembly whenever terminals arrived late.
Oct 20 · 1 min read
Stamped terminal married to a screw in an automated cell, shipped as a tested sub-assembly.
ORDERING & FAQ
From drawing to delivered parts: a four-step path with engineering review at the front and 100% dimensional inspection at the back — then the questions buyers ask us most.
Step 1
Submit CAD & Specs
Send 2D/3D drawings (STEP, DWG, PDF) with quantity, material, and tolerance requirements.
Step 2
DFM Feedback & Quotation
Our engineering team conducts DFM analysis and follows up with a competitive quote after the review.
Step 3
Precision Manufacturing
High-speed progressive die stamping, secondary forming, finishing, and surface treatment per your specifications.
Step 4
100% QC & Express Shipping
100% dimensional inspection, anti-corrosion packaging, and global express delivery.
Either. We are a stamper, not a metal distributor — we do not sell brass. You can supply coil to your own specification, or we procure the grade, temper, width and surface you name and quote material plus conversion, with the mill certificate on file.
C26000 cartridge brass, C26800 yellow brass, C27200, C28000 and C38500 are the grades we run most. If the drawing names another grade, send the spec and we confirm stampability before quoting.
0.05 mm at the thin end of our range, up to 3.0 mm at the heavy end. Thin strip runs on the high-speed presses; heavy brass runs on the larger presses in the fleet.
Yes. Pre-tinned and pre-plated strip removes the post-stamping plating step, provided the die is built for gentler entry and the parts are not tumbled afterwards. If the drawing's plating call-out and the pre-plated route conflict, we flag it at DFM.
±0.005 mm on piloted positional features, verified on a CMM at first article. Formed dimensions depend on bend count, radius and temper, so the critical formed dimensions are agreed at DFM and controlled with SPC in production.
If the part must hold contact force over millions of cycles, phosphor bronze or beryllium copper is the right answer and we say so at DFM. Brass with a hard temper is the cost-effective choice for light force and modest cycle counts.
Yes. Prototype brass stamping runs from soft tooling or laser-cut blanks formed on a brake, enough to prove fit, finish and solderability before a die is committed. When volume is confirmed, progressive stamping brass moves the same part onto a hard die, with in-die tapping if the drawing needs a thread.
Thin brass contacts run at up to 300 SPM on the high-speed frames; at 1.5 to 3.0 mm the press sets the limit, not the material. Speed is chosen per part — the point is to stamp brass at a rate the die and the burr allowance can hold, not the biggest number on a spec sheet.
Ready to Start Your Precision Stamping Program?
Send your drawing today — engineering runs a free DFM review and detailed pricing follows the review.
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