Through Hole Slip Ring

Through hole slip ring is a kind of slip ring with a hole in the center. Same meaning as a through bar slip ring sometimes called a hollow shaft slip ring or slip ring hollow shaft. Through hole slip ring totally meets with continuous transmission of power, signals, weak current, high current, and high voltage under 360-degree unrestrained rotations. Low torque, low electrical noise, low loss, and easy maintenance as the main features.

The process of manufacturing and principle are similar to other slip rings. Power, signals, and other data are transmitted from the fixed position to the rotating position through the contact between the brush and the contact. Gold brush and contact will increase the working life. The basic technical parameters of a hole/bore slip ring mainly include bore outer diameter, bore inner diameter, length, circuits, voltage, current, maximum speed, etc. The length is variable and can be customized arbitrarily, while the outer diameter and inner diameter have some standard dimensions in through hole electrical slip rings industry. The number of circuits is the one core parameter for this series of products, the larger the number of circuits, the more complex the manufacturing process, and the higher the price cost.

• Can combine the power, data and signals without interference in one rotary system
• Temperature control signal and thermocouple signal can be combined.
• Advanced multi-point contact brush technology ensures reliable contact with low friction
• Metal housing for better protection
• Integrated structure design, easy installation
• Hole size option for 12~400mm
• Standard current option for 0~20A, Standard voltage option for 0~600VAC/VDC
• Rings option for 0~300

• Wire length and exit way can be customized for rotor and stator
• Optional for flange mounting
• Optional for IP65, IP68
• High speed customization
• High temperature customization
• Hybrid pneumatic/hydraulic and electric slip ring can be mixed
• Hybrid slip rings for various signal of servo system, power line and encoder line
• Special environment can be customized, such as quakeproof, high temperature, etc.

Through bore slip rings, also known as slipring, are essential components in applications where reliable power and data transmission is required. These devices feature a hole ring design that allows cables to pass through a hole, facilitating seamless integration into rotating machinery. The slip hole configuration ensures that connections remain secure while enabling continuous rotation without interruption. As a result, slip-ring solutions are widely used in various industries, providing effective communication and power transfer in compact and dynamic environments.

Through hole slip rings, also known as hollow slip rings or hollow shaft slip rings, are electromechanical devices designed for the efficient transmission of power and data between stationary and rotating components. Their unique hollow shaft design allows for the passage of cables, hoses, or other components, making them essential in applications where space is limited.

Structure: The construction of a through bore slip ring consists of two concentric sleeves that rotate independently of each other. The inner sleeve is hollow, allowing it to fit onto a round profile, while the outer sleeve can be secured to prevent rotation. The contact points between the slip ring and brushes are maintained by integrated springs, ensuring reliable current transmission even at high speeds. This configuration is also referred to as a hollow bore slip ring, enabling efficient operation through a ring hole that supports cable feed-through.

Through hole slip rings are commonly used in various applications, including:

Robotic Arms: In robotic systems, through bore slip rings facilitate continuous rotation while allowing for the transmission of power and signals, enabling precise control and movement.

Wind Turbines: These slip rings are essential for wind turbines, where they connect rotating blades to stationary power and control systems, ensuring efficient energy transmission and operational reliability.

Medical Equipment: Through bore slip rings are utilized in medical imaging devices, such as MRI machines and CT scanners, where they help maintain a stable electrical connection while the machinery operates.

Marine Applications: In marine environments, through bore slip rings are used in radar and communication systems, allowing for continuous rotation while ensuring reliable signal transmission in challenging conditions.

Automation: These slip rings are vital in automated machinery and assembly lines, providing uninterrupted power and data flow to rotating components, enhancing efficiency in production processes.

Radar & Antenna: Through bore slip rings are used in radar systems and antennas, facilitating the rotation of equipment while maintaining consistent signal integrity for accurate tracking and communication.
These devices are particularly advantageous for power and data supply in environments requiring continuous rotation and compact installations.

Space Efficiency: Their hollow design allows for installation on existing components without the need for additional auxiliary structures, making them ideal for installations that require a slip with hole configuration.
Versatility: Suitable for both directions of rotation, hollow shaft slip rings can handle mechanical loads and maintain functionality under demanding conditions.
Durability: They can withstand speeds up to 1200 revolutions per minute and are designed to operate in temperatures ranging from -30 °C to +80 °C. The housing can be made impact-resistant and corrosion-resistant, making them ideal for harsh environments.

Ring Capacity: Available with 2 to 144 rings, each designed for rated currents up to 10 A.
Voltage Ratings: Can absorb overvoltages between 500 and 1000 VAC, with additional fuse protection recommended for higher peaks, especially in applications such as a 12v slip ring.
Insulation Resistance: Typically ranges from 500 to 1000 MOhm at 500 VDC.
Contact Materials: Gold-gold or silver-silver contacts are used to minimize abrasion and enhance corrosion resistance.

Installation is straightforward; the slip ring through bore can be pushed onto the desired position and secured with clamping screws. For solid profiles, drilling a threaded hole for a form-fitting connection is advisable, ensuring durability even in high-vibration environments.

Hollow shaft slip rings, also referred to as thru bore slip rings, are a crucial solution for applications requiring reliable power and data transmission in compact spaces, effectively enhancing operational efficiency across various industries. The innovative design allows them to operate seamlessly through the hole, making them indispensable in modern electromechanical systems.

Through bore slip rings are electromechanical devices that enable the transmission of power and data between stationary and rotating components. Their central through-hole design allows for the passage of cables, hoses, or other components, making them essential in applications where space constraints or the need for additional components are present.

The global through bore slip rings market has experienced significant growth in recent years. In 2022, the market size was valued at approximately USD 335.4 million and is projected to reach USD 483.4 million by 2029, reflecting a compound annual growth rate (CAGR) of 5.4% during the forecast period.

Industrial Automation: The increasing adoption of automation in manufacturing processes has heightened the demand for through bore slip rings, as they facilitate uninterrupted power and data transmission in rotating machinery.

Renewable Energy: The expansion of renewable energy sources, particularly wind turbines, has driven the need for reliable slip ring solutions to transmit power and control signals from rotating blades to stationary components.

Advancements in Robotics: The integration of through bore slip rings in robotic systems enables continuous rotation and precise control, essential for various industrial applications.

By Type:

Mini (Hole Size 0–10mm): Ideal for compact applications requiring minimal space.
Small (Hole Size 10–20mm): Suitable for applications with slightly larger space constraints.
Medium (Hole Size 20–100mm): Commonly used in industrial automation and robotics.
Large (Hole Size 100–300mm): Designed for heavy-duty applications requiring substantial power transmission.
By Application:

Industrial Automation: Used in machinery and equipment requiring continuous rotation.
Robotics: Facilitates power and data transmission in robotic arms and systems.
Renewable Energy: Employed in wind turbines and solar tracking systems.
Medical Equipment: Integrated into imaging devices like CT scanners.

North America currently holds a significant share of the through bore slip rings market, driven by technological advancements and the presence of key manufacturers. The Asia-Pacific region is anticipated to witness the highest growth rate due to rapid industrialization and increased investments in automation and renewable energy sectors.

Prominent companies in the through bore slip rings market include Grand.

Certifications and Quality Assurance: Grand proudly holds ISO9001, RoHS, CE, and GJB9001B certifications, affirming its commitment to quality and safety. The company has an extensive portfolio of numerous patents for slip rings and rotary joints, with products designed to meet military-grade standards, ensuring reliability and performance in demanding applications.

Collaborations and Partnerships: Grand has established strong collaborations with leading universities, research institutes, and renowned factories across Asia and Europe. Partnerships with industry giants such as Panasonic, SIEMENS, CSIC, SAMSUNG, and HUAWEI enhance Grand’s innovation capabilities and keep the company at the forefront of technology development.

Standard Operating Procedures: Grand implements standard operating procedures that are integral to ensuring both quality and timely delivery of products. This structured approach allows for consistency in manufacturing processes while meeting customer expectations.

Complete Traceability: The company’s operations are fully compliant with ISO-9001 standards, enabling complete traceability throughout the production process. This ensures that every step, from raw material sourcing to final delivery, adheres to rigorous quality assurance protocols.

S.Q.D.I.P. System: The S.Q.D.I.P. system—Safety, Quality, Delivery, Inventory, and Performance—drives excellence across the organization. This comprehensive framework helps continually refine processes, enhancing product reliability and customer satisfaction.

Grand is recognized as one of the leading through hole slip ring manufacturers, known for grand technology to innovation and quality in electromechanical solutions.As a leading player among slip ring manufacturers, Grand continues to innovate within the through bore slip rings market, providing high-quality solutions tailored to customer needs. For more information, visit grandslipring.com.