What This Collection Delivers: Flatness, Hardness, and Speed in One Package This is a ready-to-spec line of stamped steel hinges and brackets produced by BQUQ, a 20-year precision manufacturing fact
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What This Collection Delivers: Flatness, Hardness, and Speed in One Package This is a ready-to-spec line of stamped steel hinges and brackets produced by BQUQ, a 20-year precision manufacturing fact
This is a ready-to-spec line of stamped steel hinges and brackets produced by BQUQ, a 20-year precision manufacturing factory in Dongguan, China. You get stamped parts with a flatness of 0.05 mm per 100 mm, a surface finish of Ra 0.8 µm, and a lead time of 15 working days for standard sizes. The steel is case-hardened to 48 HRC, so your door, panel, or enclosure will hold alignment through 50,000 cycles without deformation.
Every hinge and bracket is made on 25-ton to 160-ton presses, then deburred and inspected. We do not paint over defects—we remove them. The result is a collection you can drop into a prototype or a production line without rework.
Stamping work-hardens the steel grain, increasing yield strength by up to 20% compared to the same grade in a machined block. That means a 1.5 mm thick stamped hinge leaf resists bending better than a 2.0 mm machined part of the same alloy. The die creates a consistent bend radius, so the hinge pin hole stays round at ±0.02 mm, not the ±0.1 mm you see from hand-finished brackets.
For heavy-duty applications, we add a crimped stop that limits rotation to 90° or 180°, eliminating the need for a separate stop pin. This reduces assembly time by 4 seconds per hinge on your line.
We stock four base steels for this line: SPCC (cold-rolled carbon steel), SECC (electro-galvanized), SUS304 (stainless), and 65Mn (spring steel). For the carbon and spring grades, we offer two heat treatment paths—through-hardening to 45–48 HRC for wear resistance, or induction hardening on the pin hole only to 52 HRC when you need a harder pivot point without making the leaf brittle.
Zinc plating is available in clear, blue, or black, with a 72-hour neutral salt spray rating. If you need food-grade or marine-grade, we skip plating and use SUS316L, which we can also stamp—just note that the minimum bend radius increases to 1.5× material thickness.
Our standard stamping tolerance is ±0.05 mm for hole-to-hole spacing up to 100 mm. For the hinge pin bore, we hold +0.02 / -0.00 mm. The flatness of the mounting surface is 0.05 mm per 100 mm, and the squareness of the leaf to the pin is 0.03 mm over the full width. This is not a “best effort” spec—it is our quoted standard for the entire Stamped Steel Hinges Brackets Collection.
Runout on the pin bore, measured with a 6.0 mm gauge pin, is 0.02 mm TIR. We achieve this by using a two-stage stamping process: a pilot hole is pierced first, then the final bore is reamed in the same die station. This eliminates the drift you get from a single-stage punch.
We do not ship a batch based on a first-article only. Every lot of 500 pieces gets a 5-piece random inspection, and every lot of 100 pieces gets a 2-piece inspection. We measure the pin bore with a digital bore gauge (resolution 0.001 mm), flatness on a granite surface plate with a dial indicator, and surface finish with a portable profilometer. The results are recorded on a certificate that ships with your order.
For the bracket’s mounting holes, we use a go/no-go gauge made to your drawing. If the gauge fails, the entire lot is halted and re-run. This has kept our rejection rate below 0.3% for the last 12 months, and it is the reason we can offer a 15-day lead time without a rush fee.
You are not limited to our standard sizes. Send us your drawing, and we will design a progressive die that combines piercing, bending, and coining in one pass. The die cost is amortized into a per-piece price—there is no separate tooling invoice unless you want to own the die. And there is no MOQ: we will run 100 pieces for a prototype or 100,000 for production. The per-piece price drops 35% when you go from 1,000 to 10,000 units.
Because we have 20 years of tool-making experience, we can quote a custom die within 12 hours. Standard parts from the collection quote within 4 hours. All quotes include the exact tolerance, surface finish, and lead time—no vague “subject to final inspection” language.
For a hinge or bracket under 3 mm thick, stamping is faster and cheaper than CNC machining. Our per-piece cost for a 50 mm × 30 mm bracket at 10,000 units is $0.12; the same part machined from plate costs $0.85. Laser cutting is slower for holes under 5 mm and leaves a burr on the bottom edge, while our stamping produces a clean shear edge without secondary deburring.
If you need a complex shape with tight internal radii under 0.5 mm, stamping is not the right process—use our CNC service instead. For reference, read our CNC cutting tool selection guide to understand when machining beats stamping. And for general tolerance decisions, check our CNC machining tolerances guide.
| Specification | Value |
|---|---|
| Base materials | SPCC, SECC, SUS304, SUS316L, 65Mn |
| Thickness range | 0.3 mm – 4.0 mm |
| Max part size | 300 mm × 200 mm |
| Hardness (case-hardened) | 45–48 HRC (up to 52 HRC on pin hole) |
| Hole tolerance | ±0.02 mm (pin bore), ±0.05 mm (mounting holes) |
| Flatness | 0.05 mm per 100 mm |
| Surface finish | Ra 0.8 µm (as-stamped), Ra 0.4 µm (optional) |
| Pin bore runout | 0.02 mm TIR |
| Lead time (standard) | 15 working days |
| MOQ | No MOQ (100 pcs for prototype) |
Yes—we will stamp a single piece for a functional test, but the per-piece price for 1 piece is 20× higher than at 1,000 pieces, so we recommend ordering at least 100 for a meaningful price.
We offer zinc plating, nickel plating, and powder coating as add-ons; powder coating adds 3 working days and costs $0.05 per square inch.
We use progressive dies with in-die gauging, and every lot is checked with CMM and go/no-go fixtures before the certificate of conformance is issued.
For standard sizes from this collection, we can expedite to 7 working days at a 15% surcharge; custom dies require 10 days minimum.
Get a firm quote within 12 hours—send your drawing to sc@bquq.com or WhatsApp +86 13713157787. Include the part name, quantity, and your target tolerance. We will reply with a price, a lead time, and a DFM note if your design can be simplified.
| 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 |
