Oil Seal 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

Consistent Sealing

Delivers 5-15N radial force ensuring 10,000+ hours service life.

Corrosion Resistance

Stainless steel construction resists oils and chemicals.

Temperature Stability

Maintains performance from -40℃ to 200℃.

Miniaturization

3mm minimum diameter for micro precision seals.

Auto-Compensation

Dynamically compensates 0.1-0.5mm lip wear.

How They Work

The spring installed behind seal lip generates radial pressure through elastic deformation, maintaining constant shaft contact despite wear.

Key Characteristics

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Materials - ASTM A313 304/316 standard, 17-7PH for high-force

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Force Range - 5-50N adjustable radial pressure, 100N specials

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Configurations - 70% C-springs, 30% helical springs

Key Design Factors

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Radial Force – FEA guarantees >90% pressure distribution uniformity

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Fatigue Life – 500k cycles dynamic sealing test required

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Fit Tolerance – ±0.05mm tolerance between spring ID and lip groove

Manufacturing Process

Wire Prep

Select 0.1-1.0mm diameter stainless steel wire.

Forming

CNC spring coiling with ±1° angle tolerance.

Heat Treatment

400℃ vacuum treatment relieves stress.

End Finishing

Laser cutting for < 0.03mm end flatness.

Surface Finish

Electro-polishing for Ra<0.2μm surface.

Testing

100% inspection for radial force, diameter and fatigue life.

Why Choose US?

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What is Oil Seal Spring？

Internal, Small Oil Seal

Internal, Small Oil Seal

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Internal, Medium Oil Seal

Internal, Medium Oil Seal

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Oil Seal Spring

Key Advantages

Consistent Sealing

Corrosion Resistance

Temperature Stability

Miniaturization

Auto-Compensation

How They Work

Key Characteristics

Key Design Factors

Manufacturing Process

Wire Prep

Forming

Heat Treatment

End Finishing

Surface Finish

Testing

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Online message

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