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China, Chinese High-Performance Steel Torsion Springs Precision Engineered for Optimal Tensioning¹ Industrial Products Supplier Manufacturer Details, price list catalog:

China Industrial Products Supplier Manufacturer List Catalog

Hardware Accessories Spring Torsion Spring

Zhuji Bosswinn Springs Co., Ltd.

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Product Description Product Description Torsion springs must never unwind from the free position; instead, they must always wound up as the torque is raised. The direction in which the force is applied will determine which way the coils coil. Keep in mind that a torque spring's diameter will constantly decrease as torque is applied. To maintain clearance between the support shaft and the spring's inside diameter, this diameter reduction must be taken into account.In order to accommodate the body lengthening that happens when the torque is applied, a torsion spring should ideally have a little gap between the coils.Depending on the mounting designs, torsion spring ends are available in different end configurations. Straight tails are the most popular and basic type of torsion spring ends. The two tails' angle with each other.vary based on the application and needed torque or rotational force. Various specific end arrangements are employed according to the distinctiveness of every mounting system. Custom-designed and produced torsion springs with various end configurations are available from RMW Industries Inc. To guarantee that your torsion springs will perform as intended for a long fatigue life, we build them with the proper rotational force and stresses.Trust Bosswinn to make superior torsion springs.Key Benefits of Bosswinn High-Performance Steel Torsion SpringsPrecision Engineered for Optimal Tensioning Precision Tension ControlDesigned for accurate torque output under rotational load.Ensures consistent performance in dynamic systems.Durable High-Grade MaterialsManufactured from premium steels such as 65Mn, Stainless Steel (304, 316, 631), and Carbon Spring Steel.Excellent resistance to fatigue, corrosion, and wear.Customizable DesignWide range of wire diameters, leg angles, coil diameters, and spring rates.Tailored to meet exact torque and rotation specifications for each application.High Load-Carrying CapabilityCapable of handling both static and cyclic torsional loads.Suitable for demanding environments such as automotive, machinery, and electromechanical systems.Compact and Space-EfficientEngineered to deliver powerful torque in minimal space.Ideal for compact mechanisms and assemblies.Strict Quality ControlEach spring undergoes load testing, angle verification, and material inspection.Guaranteed consistency and performance with full traceability.Versatile ApplicationsWidely used in automotive mechanisms, electrical switches, locks, latches, industrial tools, home appliances, and door return systems.Reliable Packaging and DeliveryNeatly packed in anti-rust bags and cartons.Fast, secure, and flexible delivery options globally.SpecificationsItemDetailsProduct NameHigh-Performance Steel Torsion SpringBrandBosswinnSpring TypeSingle Torsion / Double Torsion / Custom DesignsRaw MaterialsStainless Steel (304, 316, 631), Music Wire, Carbon Steel (SWC), Alloy Steel (SEA9260, 9254, 6150, SUP9, SUP10, SUP12, 51CrV4)Wire Diameter / Thickness0.1 mm - 8.0 mmOuter Diameter (OD)Customizable from 2 mm to 100 mm or moreTorque RangeCustomizable according to customer load requirementsRotation DirectionLeft-Hand, Right-Hand, or Bi-DirectionalNumber of CoilsDesigned as per load and space requirementsLeg Length & ShapeStraight, Hooked, Offset, or Custom FormsWorkcraft / ProcessCNC Forming, Heat Treatment, Manual Assembly, Torsion Angle AdjustmentSurface TreatmentZinc Plating, Nickel Plating, Black Oxide, Passivation, Powder Coating, PolishingTorsional Fatigue LifeUp to 1,000,000 cycles depending on applicationTolerance Standard±0.05 mm (dimension), ±10% (torque), or according to customer drawingsApplicationsAutomotive Hinges & Throttles, Door Closures, Switchgear, Mechanical Locks, Electrical Devices, Fitness Equipment, Motor Assemblies, Telecom DevicesOperating Temperature-40°C to +250°C depending on materialQuality CertificationsISO 9001:2000, ISO 14000, RoHS Compliant if requiredSample AvailabilityFree samples available for standard types; custom samples upon requestMOQ100 pcs (depends on size and design)Lead Time7-20 days depending on complexity and order volumePayment TermsT/T, L/C, Western Union (for samples or trial orders)PackingIndividual Plastic Bags → Anti-Rust Paper → Carton Box → Wooden/Plastic PalletLabelingWith Product Code, Batch No., Size, and Customer Logo if neededShipment OptionsBy Sea (Ningbo / Shanghai), By Air (Shanghai / Hangzhou), Express (DHL/UPS/FedEx)Export MarketsEurope, USA, Japan, Korea, Southeast Asia, Middle East, Australia Our production While we have listed some of the most common sizes, materials and manufacturing specifications, Bosswinn Spring provides completely customized production on all torsion springs.Large Quantity Orders, Short Runs & Making samples - formed, assembled and packaged as per your instructions.Proprietary Camera Gauge for Superior Quality - photographs and verifies each part, automatically adjusting production without shutdown.Technology capabilities - on our all manufacturing facilities , you can authorize our team ato optimize designs and lower costs.Engineering Support - our team can provide expert design assistance on any order, or view our online spring design resources.Our quality control For Bosswinn High-Performance Steel Torsion SpringsTo ensure reliable performance, dimensional precision, and long service life, Bosswinn implements a multi-stage quality assurance system in compliance with ISO 9001:2000 standards. 1. Incoming Material InspectionMaterial Certification Review: Verify supplier's mill certificates for chemical composition and mechanical properties (e.g., tensile strength, hardness).Raw Wire Testing: Conduct hardness tests, surface finish inspection, and dimensional checks (diameter, roundness).Batch Identification: Assign lot numbers for traceability. 2. In-Process Quality ControlOperator Self-Checks: During coiling, each operator checks spring dimensions using calipers, micrometers, and gauges.Real-Time Monitoring: CNC machines equipped with in-line sensors monitor coiling angles, pitch, and tension.Torsion Angle Calibration: Springs are tested for correct leg angles and preload during shaping.Heat Treatment Monitoring: Furnace temperature and dwell time are recorded to ensure proper stress relief and hardness. 3. Load and Torque TestingTorque Tester: Measure torsional force output at specific angular deflection points.Cycle Fatigue Test: For high-performance applications, selected springs undergo repeated loading cycles to confirm fatigue life.Spring Back Angle Verification: Ensure spring returns to proper angle after deflection. 4. Dimensional InspectionUse precision tools (e.g., calipers, comparators, gauges) to check:Outer Diameter (OD)Wire DiameterCoil PitchLeg Length and AngleOverall Spring Height 5. Surface and Finish InspectionVisual Checks: Inspect for surface defects (scratches, cracks, rust).Coating Thickness Testing: Use coating thickness gauges for plated or painted springs.Corrosion Resistance Test: Salt spray testing (if required by customer or spec). 6. Final Quality Control Before PackingRandom Sampling: Final inspection performed per AQL (Acceptable Quality Limit) standards.100% Inspection: Applied to critical dimensions or high-precision batches.Batch Labeling: Each lot is labeled with product code, size, material, and inspection status. 7. Documented TraceabilityMaintain full production records for:Material lot numbersMachine settingsOperator IDTest resultsPacking and shipment details 8. Continuous Improvement StrategyCustomer Feedback Handling: Any customer complaint triggers root cause analysis and CAPA (Corrective and Preventive Actions).Internal Audits: Regular internal process audits ensure compliance with quality standards.Training Programs: Continuous training for production and QC staff on standards, methods, and customer-specific requirements. Optional Third-Party Inspection SupportBosswinn accepts inspection by SGS, BV, TUV, or customer representatives prior to shipment. This robust quality control system ensures Bosswinn torsion springs meet the most demanding industry requirements and maintain reliable long-term performance.Packaging & Shipping The applications A torsion bar can be used on a vehicle ,absorbs road bumps , cushioning passenger travel. Torsion bar suspensions are used in many modern cars and trucks..In many vehicle suspension systems torsion springs are used.Can be used in the torsion pendulum. They had been used in ancient weapons or some modern toys.The balance springs or hair springs are used in mechanical watches Torsion balance springs are used in mechanical pointer-type meters Tiny torsion springs can be used in electric , like DMD or digital micromirror device chips. The Industries that Use Torsion SpringsMajor original equipment manufacturers (OEMs) that produce products for various industries use compression springs in many of their products. Industrial production linesTransportation vechilesConstruction facilitiesMaterials handlingAgriculture machinesPetrochemicalAeronautical Company Profile Our Core Product & Service Offerings1. Compression SpringsCustom-designed coil springs that resist compressive forces, used in automotive, machinery, valves, and electronics. Offered in a wide range of diameters, lengths, and load ratings.2. Tension (Extension) SpringsHigh-strength springs that absorb and store energy under tension. Tailored hook types and load specs are available for applications such as doors, levers, and industrial linkages.3. Torsion SpringsEngineered to resist rotational or twisting forces, available in single or double-torsion configurations. Ideal for hinges, clamps, tools, and industrial mechanisms.4. Flat Springs & Leaf SpringsMade from flat strip materials, these springs offer precise deflection and are used in electronics, clutches, switches, and braking systems.5. Precision Punching PartsHigh-accuracy stamped components made from steel, stainless steel, brass, aluminum, and more. We provide punching, deep drawing, forming, bending, and assembly as per customer design.6. CNC & Fine Machining ServicesWe offer CNC turning, milling, threading, grinding, and drilling of custom metal components. Tolerances up to ±0.01 mm are achievable to meet exacting standards. Additional Capabilities & SupportCustom Design & OEM/ODM ServicesFull support for client-specific spring and metal part designs, with engineering consultation and 3D drawing validation.Surface Treatment OptionsZinc plating, nickel plating, black oxide, phosphate coating, powder coating, mirror polishing, and more.Material ExpertiseSpring steel, stainless steel (SS302, SS304, SS316), copper, brass, aluminum, and special alloys.Quality AssuranceISO 9001:2015 certified with full in-house inspection: hardness, load test, surface finish, dimensional accuracy.Global Logistics & PackagingExport-grade packaging (wooden boxes, jute bags, or custom) and support for international shipping to Europe, Asia, North America, and beyond. Zhuji Bosswinn Springs is committed to delivering reliable, cost-effective, and high-performance solutions to clients worldwide. Whether you need custom springs, precision metal parts, or complete assembly services - Bosswinn is your trusted manufacturing partner. FAQ Q1: What is a torsion spring?A torsion spring is a mechanical spring that works by twisting its ends along its axis to store rotational energy. It provides torque and angular force in applications requiring precise tension or rotational movement. Q2: What materials are used for Bosswinn torsion springs?We use a variety of high-quality materials including stainless steel (304, 316, 631), music wire, carbon steel (SWC), and alloy steels like 65Mn, SUP10, SEA9260, and others depending on application requirements. Q3: Can Bosswinn customize torsion springs?Yes, we offer fully customized torsion springs based on your technical drawings or specifications including wire diameter, leg length, coil diameter, torque, and rotation direction. Q4: What industries commonly use these torsion springs?Our torsion springs are widely used in automotive components, industrial machinery, electronics, telecommunications, sports equipment, and consumer appliances. Q5: What is the typical production lead time?Standard lead times are generally 7-20 days depending on complexity and order volume. Expedited orders can be accommodated upon request. Q6: How does Bosswinn ensure product quality?We implement rigorous quality control throughout the production process, including incoming material inspection, CNC process monitoring, torque testing, dimensional checks, and final inspections in compliance with ISO 9001:2000 standards. Q7: Do you provide samples for testing?Yes, we provide free samples of standard torsion springs and custom samples upon request to help you verify performance before mass production. Q8: What surface treatments are available?Surface treatments include painting, electroplating (zinc, nickel), polishing, blackening, passivation, and powder coating to enhance corrosion resistance and appearance. Q9: How are the springs packaged?Springs are packed in plastic bags, then placed in labeled cartons. For larger shipments, wooden or plastic pallets are used to ensure safe transport. Q10: What payment terms does Bosswinn accept?We accept T/T (Telegraphic Transfer), L/C (Letter of Credit), and Western Union for samples or small orders. Q11: Can I request third-party inspection?Yes, Bosswinn supports third-party inspections by agencies such as SGS, BV, or TUV upon customer request prior to shipment.

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