OpeningYour drawing is the starting point. We turn it into a verified, batch-traceable spring. Every coil is made to your print, not to a guess. We check load, free length, and solid height before any
Your drawing is the starting point. We turn it into a verified, batch-traceable spring. Every coil is made to your print, not to a guess. We check load, free length, and solid height before anything ships.
At a glance: Wire diameter 0.1 mm – 20 mm. Tolerance per DIN 2095 Grade 1 or tighter (up to ±0.01 mm on request). Lead time 5–10 working days for prototypes. No MOQ. 100% inspection report included with every batch.
We are a precision manufacturing factory in Dongguan, China, with 20 years on CNC, stamping, and spring lines. You send the drawing. We handle the rest.
| Parameter | Value |
|---|---|
| Wire diameter | 0.1 mm – 20 mm |
| Spring OD | Up to 200 mm |
| Free length | Up to 500 mm |
| Material grades | SWP-A, SWOSC-V, SUS304, SUS316, 17-7PH, Inconel X-750, Music Wire |
| Coiling machines | CNC 5-axis (Wafios FUL 80, Torrington), 0.01 mm feed resolution |
| Tolerance | DIN 2095 Grade 1 standard; Grade 2 or custom on request |
| Surface finish | Plain, zinc plated (blue/white), black oxide, electroless nickel, powder coat |
| End types | Closed & ground, closed not ground, open, double closed |
| Max coil count | 100+ (machine limit) |
| Batch size | 1 piece to 500,000 pieces |
| Inspection | Load test (0.5% accuracy), free length gauge, OD/ID pin gauge, magnetic particle (on request) |
| Certificates | Material mill cert, RoHS, REACH, heat treatment report |
We use CNC coiling machines with servo-driven wire feed. This gives repeatable pitch and consistent load, even on long runs. For high-volume orders, we add automatic sorting and 100% dimensional checks.
1. Batch-traceable quality. Each batch gets a unique heat number and production log. If a part fails in your assembly, we trace it back to the wire lot, machine, and operator shift. No guesswork.
2. Inspection report per batch. You receive a hard copy and PDF with measured free length, OD, solid height, and load at specified deflection. We test 100% of critical dimensions on prototypes. For production, we use AQL 2.5 or your specified sampling plan.
3. One factory for CNC + stamping + spring + heatsink. Your assembly may need a stamped bracket, a CNC-machined housing, and a spring. We make all of them under one roof. This cuts your supplier list, freight cost, and tolerance stack-up risk. You get one invoice, one quality system, one responsible party.
Heavy duty compression springs from this collection go into equipment that sees constant cycling and high loads.
In every case, the buyer needs a spring that matches the drawing exactly. Our custom springs are made in China but verified to international standards. You do not have to choose between price and precision.
Looking for a different part? We also machine Custom Decorative Craft Springs | Precision Manufacturing No MOQ China in the same Dongguan factory.
Q: Do you really have no MOQ? A: Yes. We make one prototype or one million pieces. For a single piece, we charge a small setup fee. For production orders, the setup fee is waived. No MOQ means you can test a design before committing to volume.
Q: What tolerance can you hold on load and free length? A: Standard is DIN 2095 Grade 1. We can hold ±0.01 mm on OD and free length for wire up to 3 mm. Load tolerance is ±5% standard, ±2% with grinding and load sorting. Tell us your requirement; we will confirm before quoting.
Q: What is your lead time for prototypes and production? A: Prototypes ship in 5–10 working days after drawing approval. Production runs of 1,000–50,000 pieces ship in 15–20 working days. We use air freight for urgent orders. Express courier (DHL/FedEx) is available at cost.
Q: Can you provide material certificates and test reports? A: Yes. Every batch includes a material mill certificate from the wire supplier. We also provide heat treatment reports, hardness tests, and load test data. RoHS and REACH declarations are standard. Additional third-party testing (SGS, TÜV) can be arranged at cost.
Stop waiting for quotes that take a week. Send us your drawing or a simple sketch with dimensions, load, and material. We will reply with a firm quote within 12 hours.
Email: sc@bquq.com WhatsApp: +86 13713157787
We speak engineer. We answer fast. We ship verified parts.
| Parameter | Capability |
|---|---|
| Materials | SUS302/304/316, SWC piano wire, SWP music wire, 65Mn, phosphor bronze, beryllium copper |
| Types | Compression, extension, torsion, wire forms, battery springs, touch springs |
| Wire Diameter | 0.05 - 12.0 mm |
| Tolerance | ±0.02mm standard, ±0.01mm on request |
| Surface | Zinc plating, nickel, black oxide, passivation, shot peening |
| Machines | CNC spring coiling machines, torsion machines, wire forming machines |
| Prototype | 72 hours, no MOQ on samples |
| Inspection | Load test per batch, fatigue test data on request |
