JS Precision delivers reliable, tailor-made spring manufacturing services:
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Spring Manufacturing provides end-to-end spring solutions for over 6,500 clients worldwide, delivering precision and reliability in every custom design.
We specialize in three primary types of springs: compression, extension, and torsion springs, and also offer customization for custom-shaped springs and precision micro springs. We strictly control the precision of wire diameter, outer diameter, and free length, and all products can be paired with end finishing and surface finishing to meet the needs of different industries.
The most commonly used spring type, which contracts and rebounds under axial force, featuring stable stiffness and high fatigue resistance. Ideal for shock absorption, resetting, clamping, and other scenarios, supporting customization of constant or variable pitch.
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Stretches and rebounds under axial force, with hooks/loops at both ends, and initial tension can be customized. Suitable for traction, resetting, stretching, and other scenarios, with a variety of hook styles.
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Twists and rebounds under radial force, with torsion arms at both ends, providing precise torque. Ideal for rotational resetting, buckles, door locks, toys, and other scenarios, with torsion arm angles customizable as needed.
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Customize custom-shaped springs, micro springs, disc springs, and spiral springs based on customer drawings/samples. Provides one-stop service from mold design to finished product delivery, supports OEM/ODM, and can be paired with end finishing and surface finishing.
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With 15 years of spring industry expertise, we have an agile mold development team and flexible production team, paired with precision processing and testing tools. We deliver full-process custom spring manufacturing for prototypes and small-batch orders, ensuring fast delivery and consistent quality.
Our engineering team builds durable, high-volume production molds with 0.005mm precision, optimized for 1M+ cycles and long-term reliability.
Full-line CNC coiling machines handle 0.1-20mm wire, with automated production lines delivering 100k+ springs daily, 0.01mm precision, and zero burrs.
Automated grinding and chamfering systems ensure +/-0.02mm accuracy across millions of springs, guaranteeing uniform assembly fit.
Large-scale plating, electrophoresis, and blackening lines deliver consistent surface quality for bulk orders, meeting industry anti-rust standards.
Professional fatigue testers simulate real-world conditions, providing performance validation to ensure 1,000,000 cycle service life for your springs.
Our dedicated lines produce disc, spiral, and custom-shaped springs at scale, with repeatable precision for large orders.
AI-powered inspection systems and in-house labs test every batch, ensuring 100% compliance with international standards.
We scale from pilot runs to full mass production in days, with dedicated teams to ensure seamless transition and consistent quality.
Our 8-step agile process seamlessly scales from prototype and small-batch orders to medium-volume production. Every stage is controlled for flexibility, speed, and consistent quality, ensuring we grow with your project needs.
Receive drawings/samples, discuss specs, materials, quantities from 100 to 10,000+, and lead times, providing a tailored proposal and quote.
Our team designs custom molds optimized for both prototyping and production, with 0.005mm precision and 1M+ cycle durability, supporting fast iteration.
Automated cutting ensures <=0.01mm length accuracy for any order size, from single prototypes to medium-volume runs.
CNC coiling machines with quick changeovers handle 0.1-20mm wire, ensuring precise dimensions for both small prototypes and medium batches.
Precision grinding and forming ensure +/-0.02mm accuracy, whether for a single prototype or 10,000-piece batch.
Plating, electrophoresis, or blackening tailored to your needs, scalable from small runs to medium volumes.
Full inspection of dimensions, force, and fatigue life, with 100% qualification for all order sizes.
Secure, anti-rust packaging with flexible shipping options, from express prototype delivery to medium-volume logistics.
JS Precision offers a flexible, agile material selection for prototypes and small-to-medium batches, with rapid access to standard and specialty materials, ensuring your custom springs meet performance needs from concept to production.
304, 316, 316L grades for corrosion resistance, ideal for prototypes in humid, medical, or light corrosion environments.
JS Precision's technical team provides fast material recommendations for your prototypes, based on your application environment and performance needs. We support quick sourcing of standard and specialty materials to keep your project on track.
Equipped with a custom-focused surface finishing production line, we provide tailored protection solutions for the materials and testing scenarios of prototypes and small-to-medium batches. All processes comply with environmental standards, balancing corrosion resistance, wear resistance, and aesthetic requirements to extend service life of custom springs.
Core features: Low cost, uniform coating, fast turnaround
Salt spray resistance: 24-72 hours (neutral)
Suitable materials: Carbon steel, manganese steel prototypes
Suitable scenarios: Dry indoor prototypes, general industrial testing
Core features: Thick coating, strong adhesion, outdoor durability
Salt spray resistance: 200-500 hours (neutral)
Suitable materials: Carbon steel, manganese steel small-batch large springs
Suitable scenarios: Outdoor prototype testing, engineering machinery prototypes
Core features: Bright finish, good conductivity, corrosion resistance
Salt spray resistance: 100-200 hours (neutral)
Suitable materials: Stainless steel, carbon steel, piano wire prototypes
Suitable scenarios: 3C electronics prototypes, precision instrument testing
Core features: Low cost, no dimensional change, quick process
Salt spray resistance: 8-24 hours (up to 72 hours with oil immersion)
Suitable materials: Carbon steel, piano wire prototypes (not stainless steel)
Suitable scenarios: Dry indoor prototypes, low-aesthetic testing
Core features: Rust prevention, original color retention, no residue
Salt spray resistance: 304 200h+, 316 500h+
Suitable materials: 304/316/201 stainless steel prototypes (not carbon steel)
Suitable scenarios: Stainless steel prototypes, food/medical testing
Core features: Uniform coating, color options, corrosion resistance
Salt spray resistance: 200-300 hours (neutral)
Suitable materials: Carbon steel, stainless steel, piano wire prototypes
Suitable scenarios: Automotive part prototypes, home appliance testing
Core features: High hardness, smooth finish, color variety
Salt spray resistance: 300-500 hours (neutral)
Suitable materials: Carbon steel small-batch large springs (not micro prototypes)
Suitable scenarios: Outdoor prototype testing, fitness equipment prototypes
Core features: Extreme hardness, bright finish, wear resistance
Salt spray resistance: 300 hours (neutral)
Suitable materials: Carbon steel, stainless steel prototypes (higher cost)
Suitable scenarios: High-wear prototypes, precision equipment testing
For the rapid iteration needs of prototypes and small-to-medium batches, our technical team will provide agile surface finishing recommendations based on your testing scenario, material characteristics, and project timeline, supporting quick changeovers and performance validation to keep your project on track.
By Prototype Scenario: Dry indoor testing -> Blackening/Electrogalvanizing; Outdoor testing -> Hot-Dip Galvanizing/Electrophoresis; Extreme scenario testing -> 316 Stainless Steel + Passivation/Chrome Plating
By Prototype Material: Stainless steel prototypes must be passivated (quickly validate corrosion resistance); Carbon steel prototypes prioritize Electrogalvanizing/Electrophoresis (balances cost and testing needs)
By Prototype Precision: Micro-precision prototypes (wire diameter <=0.5mm) avoid Hot-Dip Galvanizing/Spraying; If size is critical, choose Electrogalvanizing/Passivation
By Special Testing Needs: For color effects -> Electrophoresis/Spraying; For wear resistance testing -> Chrome Plating/Hot-Dip Galvanizing; For food/medical testing -> 316 Stainless Steel + Passivation
We provide custom spring solutions for customers in all industries. With precise customized design and efficient delivery capacity, we meet the actual application needs of various products, help customers optimize product details, improve product operation stability, and ensure custom springs perfectly match product application scenarios.
A leading medical device company needed 0.3mm outer diameter micro springs for next-gen pacemakers, requiring medical-grade materials, +/-0.002mm precision, 1M cycle fatigue life, and prototype validation + small-batch delivery in 4 weeks.
A major TWS brand needed springs for charging cases to prevent fatigue failure after 100k open/close cycles, with stable performance from -40°C to 85°C and no additional space occupation.
A robotics firm required asymmetric springs for collaborative robot joints to enable flexible damping and rapid reset, with <=0.1mm deflection error under 10N load and compatibility with multiple joint modules.
A leading smart lock brand needed high-stability reset springs for fully automatic fingerprint locks, requiring <=0.05mm deflection error after 100k cycles and compatibility with -20°C to 60°C environments.
A battery manufacturer needed shape memory alloy springs for battery modules to trigger protection during thermal runaway, requiring precise deformation at 120°C and 1000 cycle thermal stability.
Specializing in high-precision custom spring manufacturing for global industrial clients, JS Precision is equipped with over 30 sets of professional processing and testing equipment including imported CNC spring forming machines and 2D image measuring instruments.
Our experienced technical team has 10+ years of expertise in custom spring design, offering customized solutions for micro springs, special-shaped springs, and special material springs with wire diameters ranging from 0.08mm to 12mm, covering medical, consumer electronics, smart home and other application scenarios. Adhering to the ISO 9001 certified full-process quality control system, every process complies with precision manufacturing standards to deliver cost-effective, on-time precision custom spring solutions to clients worldwide.
JS Precision builds a full-process QC system centered on precise customization matching, ensuring custom spring dimensional tolerance <=+/-0.002mm to meet stringent quality requirements of high-precision scenarios across industries.
ISO 9001 and ISO 13485 certified, with production and inspection processes compliant with international medical-grade standards, laying a solid foundation for high-precision applications.
20+ senior quality engineers, equipped with 15+ high-precision tools such as 2D image measuring instruments and high-frequency fatigue testers, enabling 0.001mm-level inspection and 1M+ cycle fatigue verification.
Traceable QC reports for every process, from raw material spectral testing to finished product performance verification, supporting real-time data access for full-link transparency.
Specialized tests such as high/low temperature simulation and salt spray corrosion ensure stable performance of custom springs under extreme working conditions.
We deliver dual assurance of quality and efficiency through precise technology, reliable delivery, and in-depth customization for your projects.
A full-process quality control system ensures stable precision of custom springs, meeting stringent quality requirements across industries.
With mature production scheduling and resource allocation, we respond quickly to diverse orders, providing stable delivery support for your project progress.
Our professional technical team supports diverse customization needs, combining design analysis to deliver cost-effective, precise solutions.
As a precision manufacturing process, custom spring manufacturing offers the following core technical advantages:
Powered by CNC forming technology, it achieves +/-0.002mm-level dimensional tolerance control, meeting adaptation requirements of complex precision scenarios.
Supports processing of micro, special-shaped, variable-pitch springs, quickly responding to diverse product design needs.
Compatible with stainless steel, titanium alloys, high-temperature alloys and other special materials, adapting to performance and environmental requirements of different scenarios.
Equipped with fatigue testing, load detection and other process links, ensuring stable and reliable spring performance throughout its lifecycle.
Flexible processing layout supports small-batch, multi-batch production, accelerating product R&D and prototype iteration.
Traceable records are retained for each process from material selection to finished product delivery, ensuring controllable quality.
Springs, with high precision and customization capabilities, serve core product scenarios across multiple fields:
Provides shock absorber springs, brake springs, seat springs, etc., adapting to high-stability requirements of core automotive components such as chassis and braking systems.
Adapts to electric drill springs, wrench springs, tool switch springs, etc., supporting high-frequency, high-load industrial tool scenarios.
Produces mobile phone button springs, charger springs, smart wearable springs, etc., meeting the needs of miniaturized, high-elasticity precision electronic scenarios.
Provides smart lock springs, camera springs, sensor springs, etc., meeting the miniaturization and low-power requirements of smart devices.
Manufactures medical instrument springs, surgical instrument springs, rehabilitation equipment springs, etc., complying with biocompatibility and high-reliability requirements of medical devices.
Produces treadmill springs, dumbbell rack springs, tensioner springs, etc., adapting to high elasticity and durability requirements of fitness equipment.
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We can produce a full range of springs including compression springs, extension springs, torsion springs, special-shaped springs, micro springs, etc. We can complete exclusive design and production adaptation according to customers' application scenarios and performance requirements.
Mainstream conventional materials such as stainless steel, high carbon steel, manganese steel and copper alloy are adaptable. Special alloy materials can also be matched according to special requirements such as high temperature resistance, corrosion resistance and high elasticity.
We support small-batch custom prototyping and large-batch large-scale mass production, flexibly adapting to customers' order needs at different stages such as R&D trial production and batch supporting.
According to the requirements of the use environment, you can choose surface treatment methods such as galvanizing, nickel plating, electrophoresis, spray coating and passivation to improve the rust and corrosion resistance of the spring.
It is recommended to provide spring drawings, dimensional requirements, application scenarios, load requirements, material preferences and batch requirements. If there is no drawing, you can provide samples or detailed performance descriptions, and our technical team will complete the drawing design and confirmation.
We have established a complete quality control system from incoming raw material inspection, full-process production control to finished product factory inspection. Each batch of products has undergone performance and precision verification to ensure that the quality meets the standards.
Yes, if you do not have a complete design drawing, our technical team can provide spring design solutions and technical suggestions based on your application requirements, installation space and other information.
Our company has a professional technical R&D team. We can optimize the structure, size and material of the spring combined with the customer's application scenario, installation space, load requirements, etc., to improve the adaptability and service life of the product.
We will arrange production reasonably according to the batch size and customization complexity of the order. Conventional orders are delivered efficiently, and the nodes of custom orders will be confirmed with customers to ensure production and delivery are completed as scheduled.
Our products are widely adapted to various industries such as automotive, 3C electronics, mechanical equipment, power tools, smart home, hardware and home appliances, security equipment, and can meet the performance and supporting needs of different industries.
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