Our mission: every copper part made by a shop built for it
Copper machining has a matching problem more than a capacity problem. We exist to fix the match, so the buyer gets the part on the drawing at a fair price and the shop wins work that plays to its strengths.
The problem we want to solve
A copper part goes wrong in a predictable way. The buyer sends the drawing to a handful of general machine shops, because from the outside every shop that lists copper looks the same. Each shop prices the job from its own experience. The ones that rarely cut copper add a margin for the burrs, the smeared surfaces and the scrap they expect. The one that quotes lowest is often the one that has not yet discovered how hard the part is.
The shops have the mirror problem. A shop that runs copper every week, with the right tools and the right habits, spends hours quoting requests that went to twenty shops and will be decided on price alone. Its real advantage, making the part right the first time, never shows up in the comparison.
Nobody in that chain is careless. The information simply does not reach the people who need it: the buyer cannot see which shop is good at copper, and the good shop cannot see which buyer needs it.
Two ways a copper RFQ can travel
Sent to every shop
- Quotes padded for risk
- Specialists skip it
- Lowest guess wins
Matched by fit
- Fewer, firmer quotes
- Specialists answer
- Fit decides
For the buyer: the part on the drawing, at the price the work deserves
The goal is not the cheapest quote. It is the lowest price at which your specification is actually met: the grade you named, the finish you called out, the edges you asked to be burr free, delivered once rather than twice.
That price comes from fit. A shop that cuts tellurium copper on a bar lathe every day does not need to guess its cycle time. A shop that builds cold plates knows where the flatness goes when the pocket is cut. When the work sits inside a shop's normal routine there is less risk to price in, less rework to absorb and fewer surprises after the order is placed. That is where a fair price comes from, and it holds after the purchase order, not only on the quote.
What a copper quote is made of
- Material
- Machine time
- Deburring and rework
- Risk margin
- Shop profit
For the shop: work that plays to its strengths
Every good copper shop is good at something specific. One has the punching, bending and milling to run busbars in volume. One has the finishing practice for RF cavities. One has the dust extraction and heat treatment knowledge to machine beryllium copper safely. Asked to compete outside that strength, the same shop either loses the bid or wins it and loses money on it.
Sent the work that fits, it can quote firmly, hold its margin and deliver on the date it gave. A shop should be able to sell at a good price because it is the right shop for the part, not because it guessed lower than everyone else.
Which shop fits which copper part
| Part family / shop strength | Plate and busbar | Fine finish milling | Bar turning | Electrode making | Hardened alloys |
|---|---|---|---|---|---|
| Busbars | Core strength | Can do | |||
| Heat sinks, cold plates | Core strength | Core strength | |||
| RF, waveguide | Core strength | Can do | |||
| Vacuum parts | Core strength | Can do | |||
| Terminals, connectors | Can do | Core strength | |||
| EDM electrodes | Can do | Core strength | |||
| Welding electrodes | Can do | Core strength | |||
| BeCu contacts | Can do | Can do | Core strength |
- Core strength
- Can do
Why copper needs its own matching
Copper looks like an easy material. It is soft, it is common and most shops will accept it. In practice pure copper does not break its chip. It smears, builds up on the cutting edge, leaves a burr on almost every edge and marks in the vise. The free-machining grades cut far better, the age-hardened grades behave like a different material again, and the grade on the drawing is usually fixed by an electrical, thermal or vacuum requirement that the buyer cannot trade away.
So "can you machine copper" is the wrong question. The useful question is which kind of copper part, in which grade, to which finish. The table shows how different those jobs are. The grade reference has the detail on each alloy.
| Part family | Grade usually on the print | What the right shop already does | What goes wrong elsewhere |
|---|---|---|---|
| Busbars and bus links | C110, half hard | Cuts, punches and bends in one flow, holds hole position and flatness, deburrs before plating | Burrs under the plating, holes that drift after bending |
| Heat sinks and cold plates | C110 or C101 | Plans deep pockets and thin fins so the mounting face stays flat, leak tests sealed plates | A flat face that warps once the pocket is cut, fins that tear |
| RF and waveguide parts | C101 or C110 | Treats the inside surface as functional, controls internal corners and finish before silver plating | Tool marks and smears that raise signal loss |
| Vacuum components | C10100 OFE | Keeps oxygen free material traceable, cleans parts to a practice suited to high vacuum | A substituted grade, contamination that shows up as outgassing |
| Terminals and connector bodies | C145 tellurium copper | Runs it on bar turning machines, threads and cross holes come off clean | Pure copper quoted instead, slow cycles, torn threads |
| EDM electrodes | C101 or C110 | Cuts the electrode undersize by the spark gap and keeps sharp detail | Electrodes cut to cavity size, corners that round off |
| Resistance welding electrodes | C182 or CuCrZr | Machines the age-hardened alloy without overheating it, works to standard cap and holder shapes | Softened material, caps that mushroom early in service |
| Spring contacts and BeCu parts | C17200 beryllium copper | Controls beryllium dust, machines before ageing and allows for the size change | Unsafe handling, parts that move out of tolerance after heat treatment |
What we commit to
- We read every RFQ ourselves before it goes anywhere.
- We send it only to shops whose strength fits that part, 3 at most, and we tell you when no shop fits rather than forwarding it anyway.
- We stay out of the price. Shops quote you directly and the order is between you and them.
- We describe each request honestly to shops, so they can decline work outside their strength without losing a day on it.
- We publish only what we can source, and we say typical when a figure is typical. See our editorial standards.
- We reply within 24 business hours, to buyers and to shops.
How we will judge ourselves
Not by how many requests pass through this site. A good match shows up later: the part passes inspection on the first delivery, the shop that quoted it wins it at a price it is content with, and the same buyer and shop work together again on the next part. When that happens the supply chain did what it is supposed to do, and we were only the introduction.
The matching itself, step by step, is on How we match. Who runs the site is on About.
Have a copper part, or a shop that cuts copper well?
Buyers: send the drawing and we reply within 24 business hours with matched shops or a clear no. Shops: tell us what you are best at.