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China, Chinese Electric Vehicle Spring Rear Shock Absorber Handle Every Turn with Confidenceb Premium Car Suspension Springs¹ Industrial Products Supplier Manufacturer Details, price list catalog:

China Industrial Products Supplier Manufacturer List Catalog

Hardware Accessories Spring Shock Absorber Springs for Cars Suspension Springs Manufacturer

Zhuji Bosswinn Springs Co., Ltd.

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Product Description Product DescriptionElectric Vehicle (EV) Spring Rear Shock Absorber IntroductionElectric Vehicle Spring Rear Shock Absorbers are critical suspension components designed to ensure a smooth, stable, and safe driving experience for electric vehicles. By combining precision-engineered coil springs with high-performance dampers, these rear shock absorbers effectively absorb road shocks and vibrations, maintain tire contact, and stabilize vehicle dynamics under various driving conditions.In electric vehicles, where weight distribution and battery placement influence handling, the spring rear shock absorber plays an essential role in compensating for extra chassis load and enhancing overall ride comfort. It also helps reduce noise, vibration, and harshness (NVH), contributing to a quieter and more refined EV driving experience. Key Features:Optimized spring rate for EV-specific weight distributionDurable steel or alloy spring material for extended service lifePrecision damping to ensure stability and handling controlAnti-corrosion coating for long-term reliabilityCompatible with regenerative braking systems Main Specifications of Electric Vehicle Spring Rear Shock AbsorberItemSpecificationSpring TypeHelical Coil Spring (Compression Type)Spring MaterialHigh-Carbon Steel / Chrome-Silicon Alloy SteelSpring Wire Diameter?8 mm - ?14 mm (customizable based on load)Spring Outer Diameter70 mm - 120 mmSpring Free Length200 mm - 450 mmSpring Rate (Stiffness)20 - 80 N/mm (depending on EV weight and usage)Shock Absorber TypeHydraulic / Gas-Charged Twin Tube or Mono TubeDamping Force (Compression)500 - 2000 N @ 0.3 m/sDamping Force (Rebound)800 - 3000 N @ 0.3 m/sMounting TypeEye-to-Eye / Eye-to-Pin / Stud-to-Eye (as required)Stroke Length100 mm - 250 mmOverall Length (Extended)300 mm - 600 mmLoad Capacity300 kg - 1000 kg per unitSurface TreatmentPowder Coated / Zinc Plated / E-CoatedCorrosion Resistance240 - 480 Hours (Salt Spray Test)Noise/Vibration PerformanceLow NVH, compliant with EV standardsWorking Temperature Range-40°C to +120°CDurability Test Cycle≥1,000,000 cycles (standard road simulation)CustomizationSpring rate, damping curves, dimensions, mount types Our production Spring Production Management & Control - Key Points1. Raw Material ControlMaterial Selection: Use certified spring steels (e.g. 60Si2Mn, 65Mn, SUS304) with proper mechanical and chemical properties.Incoming Inspection: Test for hardness, surface defects, and chemical composition using spectrometer and hardness testers.Material Traceability: Ensure all materials have batch numbers and supplier certificates for full traceability. 2. Production Planning & SchedulingOrder Review: Analyze technical drawings, tolerances, and usage requirements before production begins.Work Instructions: Generate clear process documents (routing sheets) for each spring type.Machine Allocation: Assign coiling, grinding, and forming machines based on spring size, wire diameter, and load type.Production Timeline: Maintain real-time scheduling using ERP/MES systems to manage capacity and deadlines. 3. Coiling & Forming ControlPrecision Coiling: Use CNC or automatic spring coiling machines for consistent pitch, coil diameter, and free length.Tooling Maintenance: Regularly inspect and replace mandrels, arbors, and guides to prevent deviation or scratches.Intermediate Inspection: Measure free length, outer diameter, and coil count during coiling to avoid rework. 4. Heat Treatment & Stress ReliefTempering & Quenching: Set precise temperature and soaking time to achieve required tensile strength and toughness.Stress Relief: Apply low-temperature baking to reduce internal stress and ensure dimensional stability.Process Monitoring: Record temperature logs and maintain uniformity in furnace load for batch consistency. 5. Surface Treatment & FinishingDeburring & Polishing: Remove burrs and sharp edges after coiling.Coating: Apply black oxide, zinc plating, phosphate, or powder coating for corrosion resistance.Salt Spray Testing: For high-end applications (automotive, marine), validate surface treatment with salt fog test (ASTM B117). 6. Dimensional & Functional InspectionRoutine Checks: Free length, outer diameter, wire diameter, pitch, and end configuration checked with calipers, micrometers, and gauges.Load Testing: Perform static and dynamic load-deflection tests using calibrated spring testers.Fatigue Testing: Simulate working cycles (e.g. 10,000-50,000 cycles) to ensure product endurance. 7. Packaging & DeliveryProtective Packaging: Use anti-rust bags, foam separators, or vacuum-sealing for surface-treated springs.Labeling & Traceability: Each carton includes lot numbers, material codes, and test status labels.On-Time Shipping: Coordinate logistics to meet customer lead times and minimize transit risk. 8. Documentation & Quality AssuranceInspection Reports: Provide dimensional and mechanical test reports with each batch.Certifications: Support ISO 9001, IATF16949, ROHS, and REACH compliance.Continuous Improvement: Use feedback and internal audits (PDCA/5S/Six Sigma) to enhance processes.Our quality controlEnsure mechanical performance, durability, safety, and dimensional accuracy of coil springs used in EV suspension shock absorbers. 1. RAW MATERIAL INSPECTION (IQC)ItemSpecificationInspection MethodFrequencySpring steel wireGrade: 55CrSi, SAE9254, SUP9A, etc.Diameter tolerance: ±0.05 mmMaterial certificate, Spectrometer, MicrometerEvery batchSurface conditionFree from rust, cracks, scaleVisual, Magnetic particle testEach coil bundleMechanical propertiesTensile strength, elongationUniversal testing machinePer batch 2. IN-PROCESS QUALITY CONTROL (IPQC)ProcessControl PointMethodFrequencyCoilingDiameter, pitch, coil gap, number of turnsCaliper, Go/No-go gaugeEvery 30 pcsHeat TreatmentHardness HRC 44-52 (as per spec)Rockwell hardness testEvery lotShot PeeningCompressive residual stress, surface uniformityResidual stress meter, VisualSampling per shiftEnd GrindingFlatness ≤0.5mmFlatness gaugeEvery 30 pcsSurface CoatingUniformity, thickness ≥20μm (zinc or powder)Coating thickness testerEach batch 3. FUNCTIONAL & PERFORMANCE TESTINGTestStandard/SpecMethodFrequencySpring Load TestMust meet force at 50% deflection ±5%Spring load tester100% or AQL samplingFatigue Life Test≥ 300,000 cycles (no breakage or fatigue)Fatigue test rigPer design validation and sample lotDimensional CheckFree length, outer diameter, pitchVernier caliper, fixture100% or random per lotSalt Spray Test≥ 240 hours corrosion resistanceASTM B117 / Salt spray chamberPer coating batchSet Test (Height loss)≤ 2% height loss after 3 compressionsHeight comparatorSampling batch 4. FINAL QUALITY INSPECTION (FQC)ItemRequirementMethodFrequencyVisual InspectionNo cracks, rust, deformation, or sharp edgesVisual check100%Dimensional Tolerance± tolerances on free length, diameter, etc.Caliper, Go/No-go gauge100%Load AccuracyWithin 5% of target load at defined deflectionLoad testing machineSample or 100% if critical useLabel & TraceabilityCorrect part number, batch code, QC stampLabel check100% 5. COMMON DEFECTS & PREVENTIVE ACTIONSDefectCausePreventionSpring crackingImproper material, poor heat treatmentUse certified steel, verify hardnessUneven pitch/coilCoiling machine issueRegular calibration, operator trainingEarly fatigue failureInadequate shot peening or heat treatStrict fatigue testing, peening controlCorrosionCoating defects or storageImprove surface treatment and packaging 6. PACKAGING & HANDLING CONTROLUse anti-rust oil or bags for storageEach spring is packed in protective sleeves or foamLabel with batch number, part code, and production dateAvoid stacking or crushing during transport 7. DOCUMENTATION & TRACEABILITYMaintain inspection reports (IQC, IPQC, FQC)Traceability via batch codes and serial numbersCalibration records for measuring equipmentSupplier certificates for materialPackaging & Shipping Car shock absorber springs are precision components critical to the performance and safety of a vehicle's suspension system. To ensure these springs reach customers in perfect condition, proper packaging and delivery procedures must be followed. The goal is to protect the springs from damage, corrosion, deformation, or loss during storage and transportation.Proper packing involves using secure and cushioned materials to prevent movement and impact, while effective delivery planning ensures timely and safe arrival. By adhering to well-defined packing standards, manufacturers can maintain product integrity, customer satisfaction, and brand reputation.The following outlines best practices for packing and delivering car shock absorber springs professionally and safely.The applications Bosswinn shock absorber springs and suspension springs are engineered to deliver superior performance, safety, and durability in modern automotive systems. Designed to withstand high dynamic loads and frequent cycling, these precision-formed coil springs play a vital role in vehicle ride comfort, handling stability, and suspension resilience.Bosswinn suspension springs are widely used across a range of passenger vehicles, electric cars, SUVs, and light trucks. Their primary function is to absorb road shocks, maintain vehicle height, and ensure consistent tire-road contact, thereby improving braking response and cornering control.With advanced manufacturing technology, strict quality control, and material excellence, Bosswinn springs are trusted in OEM assembly lines, aftermarket repair services, and performance vehicle upgrades. Whether for front or rear suspension systems, standard or heavy-duty models, Bosswinn provides reliable solutions tailored to automotive needs. Company Profile Company fileAbout Zhuji Bosswinn Springs - Professional Spring Solutions ProviderZhuji Bosswinn Springs Co., Ltd. is a trusted manufacturer specializing in the design, development, and production of high-performance spring components. With advanced facilities and experienced engineers, we provide customized and standard solutions for various industries.Our Core Services Include:Custom Spring ManufacturingPrecision-made compression springs, tension springs, torsion springs, and wire forms based on your drawings or samples.Damping, Suspension & Brake Chamber SpringsEngineering and mass production of springs for automotive, truck, and industrial damping systems.OEM & ODM ServicesFull support from concept design to finished product, including tooling development and sample validation.CNC Machining & Stamping PartsProduction of precision-machined and punched metal components to complement spring assemblies.Surface Treatment & Heat TreatmentIn-house processes including tempering, black oxide coating, powder coating, and plating to enhance durability and corrosion resistance.Quality Control & TestingComprehensive QC procedures, including load testing, fatigue testing, dimensional inspection, and material certification. Zhuji Bosswinn is committed to on-time delivery, stable quality, and responsive customer service for both domestic and international clients. FAQBosswinn Shocker Absorber Springs - FAQQ1: What types of vehicles are Bosswinn shock absorber springs suitable for?A: Bosswinn suspension springs are designed for a wide range of vehicles including electric cars, passenger sedans, SUVs, light commercial vehicles, and modified performance cars. Custom solutions are also available for OEM and aftermarket applications. Q2: What materials are used for manufacturing Bosswinn suspension springs?A: We use high-grade alloy spring steels such as 55CrSi, SUP9A, SAE9254, and customized materials based on customer requirements. All materials are sourced with full certification and tested for mechanical performance. Q3: How do you ensure the quality of each spring?A: Every spring undergoes strict quality control including dimensional checks, hardness tests, load performance testing, fatigue testing (≥300,000 cycles), and surface inspections. We also perform salt spray tests to evaluate corrosion resistance of coated parts. Q4: Can Bosswinn customize spring dimensions and characteristics?A: Yes. Bosswinn offers full customization services, including variable pitch, progressive rate design, free length, coil diameter, spring force, and surface treatment. Customers can submit technical drawings or specifications for tailored development. Q5: What surface treatments are available for spring protection?A: Our springs can be treated with black oxide, powder coating, electrophoresis, or zinc plating to ensure excellent corrosion resistance, aesthetic finish, and extended service life in harsh conditions. Q6: What packaging options are available for shipping springs?A: Springs are individually wrapped or nested in foam trays, anti-rust packaging, and packed in reinforced cartons or wooden crates. Each shipment is labeled with part number, quantity, and production batch code for full traceability. Q7: Do you support small quantity orders or sample production?A: Yes. We accept sample orders and low-volume batches for testing, prototyping, or specialty use. Lead time and cost will vary depending on complexity and material availability. Q8: How long is the typical production and delivery time?A: For standard models, lead time is usually 7-15 days. Custom springs may require 15-25 days depending on design complexity and tooling needs. We offer international shipping with secure and timely delivery.

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