What This Collection Delivers for Your AI Server Enclosure This is a complete line of stamped EMI shields and mounting brackets engineered for AI server chassis, GPU cages, and high-speed switch enclo
This is a complete line of stamped EMI shields and mounting brackets engineered for AI server chassis, GPU cages, and high-speed switch enclosures. You get consistent shielding effectiveness above 60 dB at 10 GHz, dimensional repeatability held to ±0.02 mm, and edge burr controlled under 0.05 mm. Typical lead time is 12 working days for custom parts, and 5 days for standard SKUs in this collection.
EMI leakage in server racks happens at gaps between panels and shield fingers. Our stamping dies are built with a clearance of 4-6% of material thickness, which produces a clean shear zone and a minimum rollover. This keeps the spring finger contact force at 0.8-1.2 N per finger, ensuring reliable grounding against the mating surface. We measure contact resistance on every lot — the average is below 10 mΩ after 500 insertion cycles.
We stock three primary alloys for this collection: beryllium copper (C17200) for maximum spring memory, phosphor bronze (C5210) for cost-sensitive RF gaskets, and stainless steel 301 (full hard) for structural brackets. For nickel plating, we use 1-3 µm electroless nickel per ASTM B733. For tin plating, hot-dip matte tin at 2-5 µm per ASTM B545. Surface roughness on critical sliding surfaces is Ra 0.8 µm or better.
The two most common failure points on AI server shields are the finger width and the mounting hole position. We hold finger width to ±0.03 mm, hole-to-hole center distance to ±0.05 mm, and overall flatness to 0.1 mm over a 100 mm length. For press-fit brackets, we control the interference to 0.02-0.04 mm so you get a secure fit without warping the chassis. All dimensions are verified with a CMM at 20°C in our metrology room.
We do not skip lot inspection. Every batch of Ai Server Emi Shields Brackets Collection goes through four gates: material certificate verification (mill test report), dimensional sampling per AQL 2.5, a 100% visual check for plating defects and burrs, and a functional spring-back test. For the spring fingers, we compress each sample to 50% of its free height and check that the return height is within 0.02 mm of the original. We also run a salt spray test per ASTM B117 — 48 hours for nickel, 72 hours for tin.
Your production volume for AI servers will ramp fast. Our progressive dies use carbide inserts (grade K20) for the punch and die sections, giving a tool life of 1.5-2 million strokes before resharpening. We keep spare inserts for every active die in our tool room, so a worn punch is replaced within 4 hours. This reduces your downtime risk. We also offer a die maintenance service: we re-certify the die every 200,000 strokes and send you a wear report.
Parts are packed in anti-static trays with individual slots to prevent finger bending during transit. Each tray holds 50 brackets, and we use 5-layer corrugated boxes with a crush strength of 12 kg/cm². For air freight, lead time is 5 days from Dongguan to Los Angeles or Frankfurt. For sea freight, it is 18 days to the US West Coast. We mark every box with a barcode and the part number, plus a batch ID for full traceability to the original coil material.
| Parameter | Specification / Value |
|---|---|
| Base Materials | C17200 Beryllium Copper, C5210 Phosphor Bronze, AISI 301 SS |
| Material Thickness | 0.15 mm – 2.0 mm |
| Hardness (as stamped) | HV 380-420 (BeCu), HV 250-300 (Phos Bronze), HRC 40-44 (SS301) |
| Dimensional Tolerance | ±0.02 mm on critical features |
| Surface Finish (critical areas) | Ra 0.8 µm max |
| Flatness (per 100 mm length) | 0.1 mm max |
| Spring Finger Contact Force | 0.8 – 1.2 N per finger |
| Electrical Contact Resistance | < 10 mΩ after 500 cycles |
| Lead Time (custom tooling) | 12 working days |
| Lead Time (standard SKUs) | 5 working days |
| MOQ | No MOQ — pilot runs accepted |
| Plating Options | Electroless Nickel 1-3 µm, Matte Tin 2-5 µm |
CNC machining of thin spring fingers is slow and leaves micro-burrs. Our stamping process produces 100 parts per minute with a blanked edge that is work-hardened, which increases the fatigue life of the spring fingers by up to 40% compared to machined edges. For a deeper look at how cutting tools affect precision parts, see our CNC cutting tool selection guide. For general tolerance limits across different processes, refer to our CNC machining tolerances guide. That guide explains why stamped parts achieve different tolerances than machined ones.
Send us your 3D model in STEP or IGES format. We will run a DFM analysis within 24 hours and tell you exactly which features are critical for EMI performance. For pilot runs, we use a hard tool with simplified inserts to keep tooling cost low — typically $800-$1500 per part number. You get 200 pieces for assembly testing within 7 days. Once the design is validated, we transfer to the production die with no change in part geometry.
There is no MOQ — we accept pilot orders of 50 pieces for testing, and standard production orders scale from 5,000 to 1,000,000 pieces per month.
Yes, we modify the die inserts for any custom finger geometry, hole pattern, or cutout shape at a tooling cost of $800-$1500, with a 7-day lead time for the first samples.
We perform a 100% visual inspection on every part, plus a statistical CMM check per AQL 2.5, and we test contact resistance on 5 samples from every batch to verify the shield stays below 10 mΩ.
Custom tooling and first articles take 12 working days, and repeat production orders ship in 5-7 working days after the die is approved.
Send your drawing or 3D model to sc@bquq.com. We will return a firm quote with tooling cost, piece price, and delivery date within 12 hours during working days. For urgent questions, reach our engineering team on WhatsApp at +86 13713157787. We are a precision manufacturing factory made in China, and we ship worldwide. No MOQ, no hidden tooling fees — just a clear quote for your exact part.
| 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 |
