If you’re sourcing EV charging pins for the first time — or even if you’ve been doing it for a while — you probably have a stack of questions that don’t always get straight answers. Here are the ones I hear most often from buyers, answered by someone who actually machines these things every day.
For CCS and NACS connector pins, the typical critical dimensions are ±0.02mm to ±0.05mm. The pin diameter and the retention groove dimensions are where you need the tightest control. Anything looser than ±0.05mm and you risk poor contact force or loose fit in the connector housing.
At VOLCRIX we hold ±0.01mm as our standard capability on Swiss turning machines. If your drawing calls for ±0.02mm or tighter, that’s well within what we run daily.
For a new design, figure 3-4 weeks from approval. That covers tooling setup, first-article inspection (FAI), and the initial production run. For repeat orders on existing tooling, 2-3 weeks is normal.
The bottleneck is almost never the machining itself — it’s the material sourcing (especially for beryllium copper, which has longer mill lead times) and the plating step if you need silver or gold.
Quick rule of thumb: if your application is DC fast charging (200A+), go with copper (C11000 or C14500) for conductivity. If it’s AC Level 2 charging (32A-80A), brass (C26000) is perfectly adequate and much more economical.
See our material selection guide for a deeper breakdown of alloy trade-offs.
99% of EV charging pins need plating. Bare copper oxidizes quickly, and copper oxide is an electrical insulator — meaning your contact resistance goes up and your pin heats up under load.
The most common spec I see: 1-3µm nickel underplate + 1-5µm silver flash. Silver oxide is still conductive, so even if the surface tarnishes over time, performance doesn’t degrade. Tin plating is another option for cost-sensitive AC applications.
Three things to check:
For prototype validation, 100-500 pieces is typical. For a pilot production run, 1,000-5,000 pieces lets you test assembly line fit without committing to full volume. Once the design is locked, we can scale to 50,000+ pieces monthly without issues.
Yes. NACS connector pins (both the larger power pins and the smaller signal pins) follow the same Swiss turning principles as CCS pins. For a full comparison, check our connector standards guide. The geometry differs — NACS pins tend to have more aggressive retention features and tighter overall envelope constraints — but we’ve machined both.
A serious precision machining supplier should provide:
If a supplier hesitates on any of these, that’s a red flag.
Yes. We ship DDP (Delivered Duty Paid) to both the US and Europe. You get a single landed cost — no surprises at customs. Typical air freight to the US West Coast is 5-7 days, to Europe 4-6 days.
Email it to lesley@volcrix.com. We accept PDF, STEP, IGES, and DXF formats. If you don’t have a formal drawing yet but have a rough sketch or a reference part, that works too — we can reverse-engineer it and suggest optimizations for Swiss turning.
Most quotes come back within 24-48 hours. See our EV charging connector pin project case study for an example of how we handled a similar project from drawing review to mass production.
That’s the whole point of this page. If you’re sourcing charging pins and something’s not clear, reach out. I’d rather answer ten questions up front than have you discover the issue after production starts.
Have more questions? Check our complete FAQ page for quick answers about VOLCRIX capabilities, materials, tolerances, and shipping.
