What Are Rotary Joints?
Rotary joints, also known as pneumatic or hydraulic rotary unions, are mechanical components that enable the continuous transfer of fluids or gases between stationary and rotating parts without leakage or pressure loss.
JINPAT rotary joints are engineered for stable operation under continuous rotation, supporting media such as compressed air, hydraulic oil, water, coolant, and other industrial fluids. Precision sealing structures and optimized internal flow paths ensure low torque, minimal wear, and long-term reliability, even in high-pressure or high-speed environments.
Depending on application requirements, JINPAT rotary joints can be designed with single or multiple flow passages, various pressure ratings, and optional integration with electrical slip rings to form compact electro-fluid rotating solutions. These products are widely used in automation equipment, packaging machinery, rotary tables, wind systems, and heavy industrial machinery where reliable fluid transfer is critical.
A slip ring, also known as a rotary electrical joint, is an electromechanical device that enables the transmission of electrical power, signals, or data between stationary and rotating parts.
A typical slip ring consists of two main components:
Rotor – mounted on the rotating structure
Stator – fixed to the stationary structure
By maintaining continuous electrical contact during rotation, slip rings allow systems to rotate freely without cable twisting or signal interruption.
A slip ring operates through conductive rings attached to the rotor and stationary brushes mounted on the stator. As the rotor rotates, the brushes maintain constant contact with the conductive rings, enabling uninterrupted transmission of power or signals across the rotating interface.
JINPAT slip rings are engineered with optimized contact materials and precision structures to ensure low electrical noise, stable transmission, and long-term operational reliability—even in continuous or high-speed rotation environments.
Slip rings are manufactured using carefully selected materials based on performance and environmental requirements:
Conductive Rings: Copper, brass, or specialized conductive alloys for stable conductivity
Brushes: Carbon-graphite or precious metal composites for low wear and reliable contact
Housings & Structures: Aluminum, stainless steel, or engineered metals for mechanical strength, heat dissipation, and corrosion resistance
Material selection directly affects electrical performance, lifespan, and suitability for harsh environments.
Slip rings are used in systems that require continuous rotation while transmitting power or signals. Typical applications include industrial automation, robotics, new energy systems, marine equipment, engineering machinery, medical devices, aerospace, defense systems, and advanced test equipment.
JINPAT specializes in designing slip rings for applications with demanding requirements on stability, precision, and durability.
The service life of a slip ring depends on factors such as design, materials, operating speed, load conditions, and maintenance practices.
Most JINPAT slip rings are engineered for long-term operation, with many models exceeding 200 million rotations under proper working conditions—making them suitable for continuous-duty industrial applications.
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At JINPAT, we pride ourselves on nearly 30 years of dedicated research and development in the slip ring industry. Our extensive experience has enabled us to develop countless slip ring solutions, ranging from standard models to highly customized products tailored to meet specific customer requirements. We understand that every application is unique, and we are committed to providing slip rings that perfectly fit your needs. Our expert team works closely with clients to design and manufacture slip rings that deliver reliable performance and durability, no matter how complex the demands. Choose JINPAT for innovative, custom slip ring solutions that ensure seamless electrical and signal transmission for your projects.
JINPAT slip rings are widely used in industries such as automation equipment, robots, medical equipment, consumer electronics, construction machinery, offshore equipment, and new energy equipment.
