Cam Gasket – Friction Torque Washer for Rotating Assemblies

Cam Gasket, also known as a cam washer, is a precision friction component designed for rotating assemblies, torque hinges, and mechanical positioning systems. It works together with shafts, a matching Concave Wheel Washer, and other Hinge Components to generate stable rotational resistance, improve positioning accuracy, and enhance the overall operating feel of mechanical products.

Unlike a standard Flat Washer, a cam gasket features a specially designed cam surface structure. During rotation, the interaction between cam surfaces creates controlled friction torque, allowing products to achieve smooth movement, stable positioning, and reliable long-term operation. Our cam gaskets are widely used in laptop hinges, monitor stands, folding mechanisms, industrial hinges, and precision rotating structures.

What Is a Cam Gasket?

A cam gasket is a specialized friction washer used inside torque hinge and rotating shaft assemblies. It usually works with a matching Concave Wheel Washer — through the specially designed 3D cam profile, the two parts generate mechanical interaction during rotation, providing stable friction torque, angle positioning capability, smooth opening and closing movement, and improved hinge operating feedback. In compact mechanical structures, the quality of the cam gasket directly affects the rotation feeling, service life, and reliability of the complete assembly.

Product Structure

The cam gasket adopts a precision-designed circular structure with a customized inner hole and cam surface profile. The inner hole matches the shaft design, ensuring the washer works together with the rotating shaft as an integrated assembly. The cam surface provides controlled contact and friction force during movement, and through precise processing and heat treatment maintains stable torque output during repeated rotation cycles.

[CTA] Send us your hinge bore diameter, torque target, and rotation cycle requirement — we'll confirm a matched Cam Gasket + Concave Wheel Washer spec within 24 hours.

Cam Gasket Specifications

• Product Name: Cam Gasket / Cam Washer

• Outer Diameter: 4.5–16 mm

• Inner Diameter: 2.5–11 mm

• Thickness: 1.2–2.0 mm

• Material: 65Mn / SK5 / SK7

• Hardness: HRC 43–50

• Surface Treatment: Nickel Plating / Black Oxide / Zinc-Nickel Coating

• Function: Friction Torque Control, Positioning, Rotation Stability

• Customization: Available

Key Functions and Advantages

• Stable Friction Torque Control — provides controlled friction resistance during rotation, helping mechanical products achieve smooth movement and stable torque performance

• Improved Positioning Stability — generates consistent friction force between rotating components, working with a Concave Wheel Washer to prevent unwanted movement and improve positioning feel

• Reduced Wear and Extended Service Life — high-quality materials and surface treatments reduce friction damage between moving parts

• Reliable Performance in Compact Structures — compact size and precision design suit space-limited applications requiring stable torque

Material and Manufacturing Process

Cam gaskets are commonly manufactured from high-performance carbon steel materials such as 65Mn, SK5, and SK7, which provide excellent strength, hardness, and wear resistance after heat treatment. The process includes precision stamping, forming, heat treatment, and surface finishing to ensure dimensional accuracy and stable mechanical performance.

• Nickel Plating — corrosion resistance and surface protection for general applications

• Black Oxide — appearance consistency and basic protection

• Zinc-Nickel Coating — enhanced corrosion resistance for demanding environments

Typical Installation Positions

• Laptop hinge rotation points, monitor stand shafts, tablet folding structures, camera rotation modules

• Motor shaft assemblies, industrial hinge structures, precision rotating joints, adjustment pivot systems

[CTA] Not sure whether a Cam Gasket alone or a Cam Gasket + Concave Wheel Washer combination fits your design? Send your drawing and we'll recommend the right pairing before you order samples.

Common Buyer Concerns

• Will torque stay consistent after long-term use? → Heat-treated 65Mn/SK5/SK7 maintains stable output through repeated cycles; hardness controlled at HRC 43–50

• Can it be used alone without a Concave Wheel Washer? → For basic friction torque, yes; for click-stop positioning and auto-return, it must be paired with a Concave Wheel Washer

• What's the difference from a Flat Washer? → A Flat Washer mainly provides spacing and load distribution; a Cam Gasket generates friction torque and positioning force through its cam surface

Quality Control

Cam surface accuracy, inner hole dimensional tolerance, thickness consistency, flatness control, and heat treatment hardness are all strictly controlled to ensure each cam gasket works smoothly with shafts and other Hinge Components throughout the product lifetime.

Custom Cam Gasket Manufacturer

Customers can customize outer diameter, inner hole design, cam profile, thickness, material, surface treatment, and torque requirements. With professional manufacturing capability and strict quality control, we help customers develop reliable friction hinge systems and precision rotating assemblies.

FAQ

How does a cam gasket improve rotational stability?
A cam gasket improves rotational stability by creating controlled friction torque between rotating components, helping maintain positioning and provide a smoother operating experience.

Where are cam gaskets commonly used?
In torque hinges, laptop hinges, monitor stands, folding devices, industrial rotating mechanisms, and precision shaft assemblies.

What is the difference between a cam gasket and a flat washer?
A Flat Washer mainly provides spacing and load distribution, while a Cam Gasket generates friction torque and positioning force through its cam surface structure.

Can custom dimensions and torque requirements be supported?
Yes. Custom dimensions, materials, surface treatments, cam profiles, and torque requirements can be developed according to your application.

What is the minimum order quantity?
No fixed MOQ — single-piece samples and bulk orders are both supported.

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