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Why Choose US?

Custom Solutions Tailored to your exact load, space, and environmental needs
ISO 9001 Certified Rigorous quality control at every stage
Rapid Prototyping Tested samples available in 5-7 days
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

What is Oil Seal Spring?

An oil seal spring is a critical component in oil seals that applies radial pressure to maintain lip contact with shafts. The C-shaped or helical spring compensates for lip wear, widely used in automotive, industrial equipment and hydraulic systems.Stainless Steel Compression Springs

Spiral, 304 Stainles···

Spiral, 304 Stainless Steel, I···

Spiral, 304 Stainless Steel, Internal, Small Oil Seal Spring for Engine

Spiral, 304 Stainless Steel, I···

Spiral, 304 Stainless Steel, Internal, Small Oil Seal Spring for Engine

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Spiral, 304 Stainles···

Spiral, 304 Stainless Steel, I···

Spiral, 304 Stainless Steel, Internal, Medium Oil Seal Spring for Engine

Spiral, 304 Stainless Steel, I···

Spiral, 304 Stainless Steel, Internal, Medium Oil Seal Spring for Engine

Read more

Oil Seal Spring

A garter spring used in seals to maintain radial pressure and prevent fluid leakage.

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
✔️
Force Range - 5-50N adjustable radial pressure, 100N specials
✔️
Configurations - 70% C-springs, 30% helical springs

Key Design Factors

✔️
Radial Force – FEA guarantees >90% pressure distribution uniformity
✔️
Fatigue Life – 500k cycles dynamic sealing test required
✔️
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.

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