## Opening This collection is not a stock catalog. It is a reference set of spring geometries we have produced in the last 12 months. You send the drawing. We make the spring.Eve
Custom Mixed Spring Types Collection 03 – Precision Manufacturing, No MOQ
## Opening This collection is not a stock catalog. It is a reference set of spring geometries we have produced in the last 12 months. You send the drawing. We make the spring.Every part is manufactu
Get a Fast Quote for This Part
Send us your drawing / quantity / material — reply within 24h.
This collection is not a stock catalog. It is a reference set of spring geometries we have produced in the last 12 months. You send the drawing. We make the spring.
Every part is manufactured to your specified tolerances, verified with a 3D coordinate measuring machine before shipment. No exceptions.
Tolerance: ±0.02 mm on wire diameter, ±0.05 mm on free length
Lead time: 7–12 working days for prototypes, 15–20 days for production
No MOQ: order 1 piece or 100,000 pieces
Material certs: EN 10204 3.1 included with every batch
Made in China, shipped globally from our Dongguan factory
Spring steel (EN 10270-1), stainless steel (302, 304, 316, 17-7PH), music wire, phosphor bronze, beryllium copper
Coiling machines
CNC 5-axis spring coilers (Wafios, MEC) for wire ≤ 6 mm; CNC lathe for wire > 6 mm
Grinding
End grinding for compression springs, flatness ≤ 0.05 mm
Surface treatment
Zinc plating, nickel plating, electropolishing, passivation, black oxide, shot peening
Tolerance class
DIN 2095 grade 1 (precision) or grade 2 (commercial) – specify on drawing
Inspection
100% dimensional check on critical features; load testing at 20%, 50%, 100% of working load
Batch traceability
Heat number and production batch code laser-marked on packaging label
Three reasons buyers send us their drawings
1. Batch-traceable quality
We assign a unique batch number to every order. That number links to the material heat, coiling machine settings, heat treatment parameters, and inspection records. If a field failure occurs, you can trace the root cause in minutes, not days.
2. Inspection report per batch
You receive a full inspection report with each shipment. It includes dimensional measurements, material hardness, surface finish, and load-deflection curves. The report is signed by our QC engineer and stamped with our factory seal. No extra charge.
3. One factory for CNC + stamping + spring + heatsink
Your assembly likely needs more than just springs. We run CNC machining, metal stamping, and heatsink production lines under the same roof. Send us your full BOM. We coordinate all parts in one place, reducing your supplier management time and shipping costs.
Where these parts are used
Custom springs from this collection go into demanding applications where failure is not an option.
Automotive: valve springs, clutch return springs, brake pedal return springs. We hold IATF 16949 certification for this sector.
Medical devices: precision torsion springs for surgical staplers, compression springs for insulin pens. We use medical-grade 316L stainless steel on request.
Electronics: wave springs for battery contacts, small compression springs for microswitches. Wire diameters below 0.2 mm are our specialty.
Industrial equipment: heavy-duty compression springs for hydraulic valves, extension springs for conveyor tensioners.
Aerospace: we supply springs for cabin interior mechanisms, meeting AS9100 requirements.
If your application is not listed, call us. We have designed springs for everything from vending machines to nuclear power plant actuators.
Questions buyers ask before ordering
Q: What is your minimum order quantity?
A: No MOQ. We produce one prototype for your validation, then scale to your volume. Tooling cost is zero for standard wire diameters.
Q: How do you ensure tolerance and quality?
A: We use CNC coilers with closed-loop feedback. Every spring is measured on a digital caliper or CMM. For load-critical springs, we test each piece on a force tester. A batch inspection report is sent with your shipment.
Q: What is your lead time?
A: Prototypes in 7–12 working days after drawing approval. Production orders in 15–20 working days. For urgent needs, we offer a 48-hour express prototype service at a 30% surcharge.
Q: Can you provide material certificates?
A: Yes. Every batch comes with EN 10204 3.1 material certificates. We also provide heat treatment reports and surface coating thickness certificates on request.
Send your drawing
We respond with a firm quote within 12 hours. No vague estimates. You get unit price, tooling cost (if any), lead time, and delivery terms.
Email your PDF or STEP file to sc@bquq.com
WhatsApp for quick questions: +86 13713157787
Precision manufacturing is our only business. Custom springs are our core product. Send the drawing. We will handle the rest.
