OpeningYour torsion spring design is unique. We make it exactly to your drawing—no interpretation, no shortcuts. Every brass buckle shaft torsion spring is verified for wire diameter, coil count, free
Your torsion spring design is unique. We make it exactly to your drawing—no interpretation, no shortcuts. Every brass buckle shaft torsion spring is verified for wire diameter, coil count, free angle, and leg position before shipment.
We are BQUQ, a precision manufacturing factory in Dongguan, China. We have run CNC, stamping, spring, and heat sink lines for 20 years. This is not a trading desk. We cut wire, wind coils, and grind ends on our own floor.
| Parameter | Value |
|---|---|
| Wire diameter | 0.2 mm – 8.0 mm |
| Outer diameter | 1.0 mm – 60.0 mm |
| Free length | 2.0 mm – 200.0 mm |
| Total coils | 2 – 50 |
| Leg length | 2.0 mm – 80.0 mm |
| Leg angle tolerance | ±2° |
| Spring rate tolerance | ±5% (or tighter per request) |
| Materials | Brass C2680, C2600, H65, H62; phosphor bronze; stainless steel 301/302/304 |
| Surface finish | Bright, nickel plated, zinc plated, passivated, or as-drawn |
| Machines | CNC coiling machines (0.2–8.0 mm), automatic torsion winders, 4-axis CNC end grinders |
| Process | Coiling → stress relief → end forming → grinding (if required) → cleaning → inspection |
| Batch traceability | Heat number and wire lot recorded per batch |
| Inspection report | Dimensional report, load test, material cert, surface check—sent with every shipment |
All springs are made in China at our Dongguan facility. We do not outsource. You get one quality standard, one responsible party.
1. Batch-traceable quality, not random luck. We assign a unique batch number to every order. The wire lot, machine settings, heat treatment temperature, and inspection results are linked to that number. If you need to audit or trace a part six months later, we can pull the full record in minutes. This matters for automotive, medical, and lock applications where a failed spring is a liability.
2. Inspection report per batch—free, no negotiation. Every batch ships with a dimensional report. We measure wire diameter, free angle, coil gap, leg position, and spring rate. For critical springs, we include a load-deflection curve. You do not have to ask. It is standard. If you want third-party inspection (SGS, TUV), we arrange it at cost.
3. One factory for CNC + stamping + spring + heat sink. Your brass buckle shaft torsion spring often sits next to a stamped bracket, a CNC-machined shaft, or a heat sink. We make all of them under one roof. That means one purchase order, one set of tolerances, one shipping date. No coordination headaches between three suppliers. No finger-pointing when a part does not fit.
Brass buckle shaft torsion springs are not decorative. They are functional, load-bearing components in tight spaces.
If your application is not listed, send the drawing anyway. We have made torsion springs for drone gimbals, vending machine coin mechanisms, and even aerospace test fixtures.
Looking for a different part? We also machine Custom Mixed Type Industrial Springs | Precision Manufacturing No MOQ in the same Dongguan factory.
Q: What is your MOQ? A: No MOQ. We accept 10-piece prototype orders and 100,000-piece production runs. Prototype pricing is slightly higher per piece, but tooling is free for standard wire diameters. If you need a custom wire size, we will quote the die cost separately.
Q: What tolerance can you hold on torsion springs? A: Standard is DIN 2095 grade 2: ±0.05 mm on wire diameter and ±5% on spring rate. For critical applications, we hold grade 1: ±0.03 mm and ±3%. We verify with a digital force gauge and optical measuring projector. If your drawing specifies tighter, we will tell you if it is feasible before you pay.
Q: What is your lead time? A: Prototypes: 7–12 days from drawing approval. Production: 15–20 days. For urgent orders, we can rush prototypes in 3 days at a 20% surcharge. We ship via DHL, FedEx, or sea freight—your choice.
Q: Do you provide material certificates? A: Yes. Every batch includes a mill certificate for the brass or steel wire, showing chemical composition and mechanical properties. If you need a full EN 10204 3.1 certificate, we arrange it with the wire mill at no extra cost for orders above 500 kg.
Stop guessing if your spring will fit. Send us your drawing—PDF, STEP, IGES, or even a hand sketch with dimensions. We will check the design for manufacturability, suggest material if you are unsure, and send a firm quote within 12 hours.
Email: sc@bquq.com WhatsApp: +86 13713157787
No MOQ. No minimum order fee. No sales pressure. Just a precise quote from a precision manufacturing engineer who has wound millions of springs.
| 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 |
