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As an experienced OEM manufacturer with all-around custom service, we produce high-performance music wire double leg torsion spring made of premium SWP-B music wire (piano wire). This custom small torsion spring is equipped with two equal short torque arms, specially engineered to deliver consistent reset torque for appliance hinge and light rotating mechanical structures.
Our complete production workflow adopts CNC dedicated torsion spring coiling machine for integrated coiling and leg bending, followed by high-temperature stress relief tempering, wire end chamfer deburring, ultrasonic degreasing, electroplating activation, lead-free bright nickel electroplating and post-plating passivation sealing. Each nickel plated torsion spring gets full inspection on torque force, dimensional tolerance and surface finish. Our factory accepts OEM custom orders based on customers’ technical drawings or physical samples to match unique appliance hinge and industrial assembly demands worldwide.
Technical Specification
Product Name:Nickel Plated Small Appliance Hinge Torsion
Raw Material:SWP-B Music Wire / Piano Wire (High Carbon Spring Steel, Non-Stainless Steel)
Wire Diameter:1.6mm
Total Coil Turns:9 coils
Outer Coil Diameter:12.1mm
Double Torque Arm Length:3mm (arm length & angle fully customizable)
Custom private labeling, neutral bulk packaging for large OEM orders
Low-volume pre-production prototype samples before mass manufacturing
Flexible MOQ to support both small trial batches and large-volume wholesale orders
Product Advantages
SWP-B music wire raw material + high-temperature tempering: Fixes easy fatigue fracture and torque fading issues of ordinary custom small torsion spring after long repeated twisting
Lead-free environmental bright nickel plating + passivation sealing: Eliminates quick rust, short salt spray life and harmful heavy metal risks of uncoated or cheap plated music wire double leg torsion spring
Dedicated CNC integrated molding process: Avoids uneven coil spacing, asymmetrical dual legs and inconsistent size tolerance from manual bending nickel plated torsion spring
Full wire end chamfer deburring: Removes sharp burrs that scratch assembly staff and scratch matching appliance hinge plastic shells
100% finished product torque & dimension full inspection: Solves batch torque inconsistency that causes appliance hinge reset failure and assembly scrap loss
Eco-friendly cadmium-free nickel coating: Meets global environmental import standards, avoids customs detention for overseas appliance component buyers
Quality Control
Raw material incoming inspection: Tensile strength, hardness and chemical composition test for SWP-B music wire
In-process periodic dimensional inspection during CNC coiling and torque arm bending
High-temperature tempering furnace temperature monitoring to guarantee uniform stress relief
Ultrasonic cleaning residue test to remove all machining oil contaminants
Electroplating layer thickness uniformity test for environmental nickel torsion spring
Salt spray aging test to verify anti-corrosion performance of nickel plated torsion spring
Final full inspection: Dimension tolerance detection, torque force testing, surface scratch & burr visual check
Cyclic torsion fatigue testing to confirm long service life for appliance hinge operating cycles
FAQ
Q1: Can I order custom small torsion spring with modified leg length or coil size?
A1: Absolutely, we are a professional OEM manufacturer with full custom service, all structural parameters of music wire double leg torsion spring can be customized per your drawings or samples.
Q2: What is the production lead time for environmental nickel torsion spring orders?
A2: Prototype samples take 4–6 working days; mass bulk OEM orders take 8–14 working days depending on total order quantity.
Q3: Is the nickel plating on this nickel plated torsion spring compliant with international eco standards?
A3: Yes, our bright nickel coating is lead-free and cadmium-free environmental nickel finish, meets mainstream global import environmental regulations.
Q4: What MOQ do you require for appliance hinge torsion spring OEM orders?
A4: We have no strict high minimum order quantity, small trial sample batches are fully supported for custom projects.
Q5: Can you provide torque force and salt spray test inspection reports for bulk shipments?
A5: Yes, official test reports of dimensions, torque and anti-rust performance can be provided for mass OEM orders on request.
