Durable Low Friction X Rings for Rotating Shaft and Cylinder Sealing

X-rings, also known as star rings due to their distinctive X-shaped cross-
section, represent a thoughtful upgrade from the traditional O-ring. While both
serve the purpose of sealing, the X-ring stands out for its refined design—
specifically the four sealing lips and a small lubrication cavity in the
center. This unique structure helps reduce both friction and starting
resistance, making it ideal for dynamic applications.

One of the often-overlooked advantages of X-rings is the positioning of the
flash line—it sits in the recessed area of the cross-section, which not only
improves the seal but also reduces the chances of leakage. In other words, the
X-ring takes everything good about the O-ring and pushes it one step further.

A Smarter Choice for Demanding Applications
X-rings can be used in a wide variety of environments. To ensure optimal
performance, the material must be chosen based on factors like temperature,
pressure, and the type of medium involved. It’s not just about choosing a
rubber ring—it’s about matching the right material to the job.

When setting up a system, engineers should factor in peak and continuous
operating temperatures, the frequency of use, and in rotating applications, the
heat generated from friction. These considerations will determine the service
life and effectiveness of the seal.

What Makes X-Rings a Better Performer?
Unlike an O-ring, which only has one contact point, the X-ring offers four
contact surfaces. This means pressure is distributed more evenly, reducing
friction by up to 40% and significantly slowing wear over time. It’s a clear
performance boost, especially in systems that cycle frequently.

Where Do X-Rings Shine?
You’ll find X-rings in some of the most demanding applications:

Heavy-duty machinery: hydraulic cylinders in excavators and presses

Industrial robotics and turbines: rotating shafts and spindles

Aerospace systems: actuators in aircraft landing gear that face sudden pressure
changes

Automotive transmissions: dual clutch systems that require precise sealing

Oil and gas: critical components like blowout preventers in offshore rigs

Material Options for Different Needs
Different environments demand different materials, and X-rings are available in
several:

NBR (nitrile rubber): cost-effective, reliable across a wide range of
industrial uses (-40°C to +125°C)

FKM (fluoroelastomer): excellent resistance to high temperatures and aggressive
fluids (-20°C to +250°C)

PTFE: ideal for low-friction, high-precision sealing in sensitive equipment

Why DEDE’s X-Rings Stand Out
As a certified high-tech enterprise recognized for “specialization,
refinement, and innovation,” DEDE brings over 30 years of experience in
sealing technology. We don’t just offer parts—we provide complete sealing
solutions. Whether it's rapid prototyping for custom designs or supplying from
our inventory of over 10,000 standard parts, our flexible production system
meets global demand with speed and precision.

Today, DEDE supports clients in over 80 countries with localized technical
guidance, ensuring that our seals don’t just fit—they last.

If you're unsure about the specifications or material choice for your
application, our engineering team is ready to provide tailored advice. With X-
rings, it's not about using just any seal—it’s about using the right seal.

Minimum Order: 500 pieces

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