Extension Spring-Precision Spring

Precision Hardware

Forging industrial backbone with micron precision, LH Hardware delivers end-to-end solutions for global advanced manufacturing – from precision springs, custom springs to stamping, shafts, and linear motion systems

Precision Springs

High-precision springs manufactured via CNC coiling or cold forging, featuring tight tolerances (±0.003mm) and superior fatigue resistance, ideal for automotive suspension and precision instrumentation requiring consistent load-bearing performance.

Special Springs

Custom-engineered springs for extreme conditions, such as high-temperature (up to 300°C) or corrosive environments (titanium/hastelloy), used in aerospace hydraulics and nuclear reactor dampers

Wire Forming

Multi-station cold heading process forming wire (Φ0.1-3mm) into precision parts (connectors, snaps) with ±0.02mm tolerance, serving 5G infrastructure and smart home applications

Precision Stamping

Micron-level stamping (Ra≤0.4μm) of 0.05-3.5mm metal sheets via progressive dies, producing EMI shields and battery contacts for semiconductor and EV battery modules

Precision Shafts

Ultra-precision ground shafts (Ra≤0.2μm) with ±0.002mm diameter tolerance, employed in robotic joints and CNC spindles for ±0.005mm repeatability

Why Choose US?

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Custom Solutions Tailored to your exact load, space, and environmental needs

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ISO 9001 Certified Rigorous quality control at every stage

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Rapid Prototyping Tested samples available in 5-7 days

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Global Supply Chain Reliable delivery across North America, Europe & Asia

Contact US

E-mail: sales@lihongsprings.com

Mobile: +86 176 6501 0974

WhatsApp: +86 150 1844 0213

FAX: +86 0769-8532 4238

Add: Room 101, Building 1, No. 446 Yanglang Road, Dalingshan, Dongguan, Guangdong, China

Key Advantages

Extended Lifespan

Made of premium spring steel, standard products endure 50,000+ cycles, specially treated versions last 100,000 cycles.

Precise Elasticity

Spring rate deviation controlled within ±5% ensures consistent tension output.

Space Efficiency

0.2mm min wire diameter, 5-500mm free length options, saves 25% space vs compression springs..

Safety Certified

ISO 9001 & IATF 16949 certified, withstands 300% extension without deformation.

Versatile Ends

12 end types (eye hooks/lateral loops etc.) for various mounting requirements.

How They Work

When pulled axially, coil spacing increases to store energy; upon release, the spring contracts to release stored energy.

Key Characteristics

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Materials - Standard-SWC high-carbon steel (2000MPa), medical grade-316L stainless steel

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Performance - Initial tension ≥8% max load, spring index 6-12 optimizes stress

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Surface Treatment - Zinc/nickel/passivation options, 1000hr salt spray test

Key Design Factors

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Stress Analysis – FEA ensures stress concentration factor < 1.8 at hooks

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Fatigue Testing – 100,000 cycles at ±25% stroke for dynamic use

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End Reinforcement – CNC-machined ends increase capacity by 50%

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Environment – Inconel718 for 800°C high-temperature applications

Manufacturing Process

Material Prep

Select spring steel/stainless wire of specified diameter.

Coiling

CNC coiling machine forms helix with ±0.02mm precision.

Heat Treatment

380-450℃ tempering refines grain structure.

End Forming

Laser cutting/stamping creates specific end types.

Surface Treatment

Zinc plating/passivation/Teflon coating option.

Testing

100% inspection for torque, fatigue life and dimensions.

Packaging

VCI paper + vacuum packing prevents corrosion.

Precision Hardware

Forging industrial backbone with micron precision, LH Hardware delivers end-to-end solutions for global advanced manufacturing – from precision springs, custom springs to stamping, shafts, and linear motion systems

Precision Springs

High-precision springs manufactured via CNC coiling or cold forging, featuring tight tolerances (±0.003mm) and superior fatigue resistance, ideal for automotive suspension and precision instrumentation requiring consistent load-bearing performance.

Special Springs

Custom-engineered springs for extreme conditions, such as high-temperature (up to 300°C) or corrosive environments (titanium/hastelloy), used in aerospace hydraulics and nuclear reactor dampers

Wire Forming

Multi-station cold heading process forming wire (Φ0.1-3mm) into precision parts (connectors, snaps) with ±0.02mm tolerance, serving 5G infrastructure and smart home applications

Precision Stamping

Micron-level stamping (Ra≤0.4μm) of 0.05-3.5mm metal sheets via progressive dies, producing EMI shields and battery contacts for semiconductor and EV battery modules

Precision Shafts

Ultra-precision ground shafts (Ra≤0.2μm) with ±0.002mm diameter tolerance, employed in robotic joints and CNC spindles for ±0.005mm repeatability

Why Choose US?

Contact US

What is Extension Spring？

Carbon spring steel,round

Carbon spring steel,round

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SUS304,cylindrical,long hook e···

SUS304,cylindrical,long hook e···

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Alloy spring steel,cylindrical

Alloy spring steel,cylindrical

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Copper alloy steel,round

Copper alloy steel,round

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Spring steel,black ultra-light···

Spring steel,black ultra-light···

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Spring steel,blue ultra-light ···

Spring steel,blue ultra-light ···

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Extension Springs

Key Advantages

Extended Lifespan

Precise Elasticity

Space Efficiency

Safety Certified

Versatile Ends

How They Work

Key Characteristics

Key Design Factors

Manufacturing Process

Material Prep

Coiling

Heat Treatment

End Forming

Surface Treatment

Testing

Packaging

Online message

Online message

Contact us

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PRECISION STAMPING

WIRE FORMING

SPRINGS

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