We are BQUQ, a precision manufacturing factory in Dongguan, China, with 20 years of CNC machining and metal stamping experience. This product line is for electrical contact stamping parts: flat or for
We are BQUQ, a precision manufacturing factory in Dongguan, China, with 20 years of CNC machining and metal stamping experience. This product line is for electrical contact stamping parts: flat or formed contacts, spring contacts, and connector terminals that carry current or signals. You get tolerances of ±0.005 mm, surface finish Ra 0.2, and hardness up to 45 HRC — with a standard lead time of 7 days for prototypes and 15 days for production runs.
Electrical contacts are often stamped from 0.05 mm to 0.5 mm strip — thin material moves, springs back, and distorts. We use high-speed servo presses (25 to 60 tons) with closed-loop position control. Each die station is ground to a step of 0.002 mm, and we run in-die optical sensors that check critical dimensions every stroke. That is why we hold ±0.005 mm on pitch and ±0.01 mm on formed heights, even at 800 strokes per minute. Our die maintenance crew re-laps cutting edges after every 200,000 strokes, so drift stays out of your tolerance band.
We stock coils of C1100 copper, C17200 beryllium copper, C5210 phosphor bronze, and 304/316 stainless steel. For high-cycle spring contacts, we specify C17200 in the TH04 temper, then age-harden to 38–45 HRC after stamping. That gives a yield strength of 1,100 MPa — enough for millions of deflection cycles. If your part needs silver or gold plating, we pre-treat the strip before stamping to avoid edge burrs. We also offer selective plating (masked areas stay bare) for corrosion resistance without adding cost to the whole surface.
Your contacts may have slots, fingers, or lances as narrow as 0.05 mm. We build progressive dies in-house using wire-cut carbide inserts — not soft tool steel. The die clearance is set to 5% of material thickness per side, which eliminates burrs on the shear edge. For parts with tight bend radii (less than 1x material thickness), we add coining stations to control springback. Every die is tested with 5,000 parts before we release it to production; you get a first-article report with those test results.
A burr on an electrical contact causes arcing, overheating, and premature failure. We keep burr height under 0.02 mm on all stamped edges. For parts that require even smoother edges, we add a micro-finishing pass using vibratory deburring or electropolishing. This brings surface finish to Ra 0.2 and removes any microscopic slivers. We measure burr height with a laser profilometer at the press — not just on a sample — and log the data per lot.
We do not ship blind. Each lot goes through a 2.5D optical projector for profile checks, a CMM for formed dimensions, and a hardness tester (Rockwell or Vickers, depending on thickness). We also run a salt spray test on plated contacts per ASTM B117 — 48 hours minimum, no white rust. For critical batches, we include an XRF coating thickness report. You get a full inspection certificate with every shipment, and we keep samples of each lot for 3 years in our archive.
We know you need parts fast. For a prototype die (simple flat contact, one-up), we deliver in 7 days. For a progressive die with 5 or more stations, allow 15–20 days. Production runs start at 10,000 pieces, but we have no MOQ — you can order 500 pieces for a pilot build at the same unit price as 50,000, because we price per stroke, not per minimum. Our record for a rush order: 48 hours from drawing to first article on a simple contact stamping.
You are reading this from a High Precision Electrical Contact Stamping Parts Supplier page — and we mean it. Our factory runs 24/7 with 40 presses, and we have our own toolroom and QC lab. Buying direct removes the trading company markup, and our location in Dongguan means cheap logistics to Shenzhen, Hong Kong, or direct air freight. We have supplied contacts for automotive relays, medical sensors, and industrial connectors to clients in Germany, Japan, and the US. If you are comparing us to other made in China suppliers, check our 20-year track record and the tolerances we commit to in writing — not just on a sales call.
Before you send a drawing, read our CNC cutting tool selection guide for tips on die materials, and our CNC machining tolerances guide to understand what we can hold on your specific geometry.
| Specification | Value / Range |
|---|---|
| Material thickness | 0.05 mm – 3.0 mm |
| Available materials | C1100, C17200, C5210, 304, 316, 42CrMo4 |
| Hardness (after heat treatment) | 20 – 45 HRC (depending on material) |
| Flatness tolerance | ±0.01 mm over 10 mm length |
| Critical dimension tolerance | ±0.005 mm |
| Surface finish Ra | 0.2 µm (as stamped or after finishing) |
| Burr height (max) | 0.02 mm |
| Runout (for formed contacts) | ≤0.02 mm TIR |
| Prototype lead time | 7 days |
| Production lead time | 15 – 20 days |
| MOQ | No MOQ (500 pieces for pilot) |
We have no MOQ — you can order 500 pieces for a pilot run, and we will still deliver the same tolerance and inspection quality as a 1-million-piece order.
Yes, we source custom strip alloys and plating (silver, gold, tin, or selective plating) based on your current rating, contact resistance, and environmental requirements.
We use in-die optical sensors for 100% dimensional checks, plus batch-level CMM, hardness, and salt spray testing, and we keep lot samples for 3 years.
Send us your drawing and we will confirm within 6 hours — prototypes typically ship in 7 days, and production in 15–20 days after die approval.
Ready to get a firm quote within 12 hours? Send your drawing to sc@bquq.com or WhatsApp +86 13713157787. We will review geometry, material, and tolerances, then reply with a price and lead time — no MOQ, no runaround. Just a precise number from a precision manufacturing partner in Dongguan.
| Parameter | Capability |
|---|---|
| Materials | SPCC, SGCC, SUS301/304/316, brass, copper, beryllium copper, phosphor bronze |
| Process | Progressive die stamping, fine blanking, deep drawing, bending, tapping |
| Tolerance | ±0.01mm standard, ±0.005mm on request |
| Surface | Zinc plating, nickel, tin, gold, powder coating, passivation, anodizing |
| Die Size | Up to 1200 x 800 mm, 16-250 ton presses |
| Thickness | 0.05 - 6.0 mm sheet metal, wire 0.1 - 8.0 mm |
| Prototype | 7-15 days tooling, no MOQ on samples |
| Inspection | Full report per batch, CMM and optical measurement |
