JB25-6-100: SMC Floating Joint, the Precision Connection Expert for Industrial Automation

Product Overview

The JB25-6-100 is a floating joint produced by SMC Corporation of Japan, belonging to the JB series. This floating joint features a compact design, with characteristics such as the ability to absorb misalignment errors, high load capacity, and easy installation. It is widely used in industrial automation control systems, providing a reliable, flexible connection solution for cylinders and actuators.

Core Product Advantages

1. Misalignment Error Compensation The floating joint can absorb eccentricity and parallelism errors between the actuator and the cylinder, eliminating the need for perfect coaxial alignment. It allows for an eccentricity of 0.5mm and a swing angle of ±5°, effectively reducing installation precision requirements.
2. High Load Capacity Capable of withstanding a maximum tension of 2500N and a compression force of 500N, it is suitable for various industrial applications with significant loads.
3. Compact Design Features a small, compact size with low installation space requirements, making it particularly suitable for automation equipment with limited space.
4. Long-Life Design Equipped with a dust cover made of synthetic rubber, effectively preventing dust ingress into the internal structure and extending service life.

Technical Parameters

Parameter Item	Specification Value	Explanation
Series​	JB Series	Product Series
Suitable Cylinder Bore​	25 mm	Compatible Cylinder Size
Connection Thread​	M6×1	Thread Specification
Maximum Allowable Tension​	2500 N	Tensile Load Capacity
Maximum Allowable Compression​	500 N	Compressive Load Capacity
Allowable Eccentricity​	0.5 mm	Eccentricity Compensation Range
Allowable Swing Angle​	±5 °	Angular Compensation Range
Operating Pressure​	1 MPa	Working Pressure
Operating Temperature​	-5 ~ 60 °C	Operating Temperature Range
Dust Cover Material​	Synthetic Rubber	Protective Material

Model Number Breakdown

• JB25: SMC Floating Joint Series Code, suitable for 25mm cylinder bore
• 6: Connection Thread M6
• 100: Specification Code

Working Principle

The JB25-6-100 floating joint utilizes a spherical contact structure, achieving multi-degree-of-freedom compensation through its internal spherical fit. When installation errors exist between the cylinder piston rod and the driven body, the floating joint absorbs radial eccentricity, axial offset, and angular misalignment through the free swinging and rotation of its spherical structure. This avoids the generation of additional stress from rigid connections, protecting the cylinder’s internal seals and bearings from damage.

Workflow:

1. The cylinder piston rod is connected to the floating joint via threads.
2. The other end of the floating joint connects to the driven body.
3. In the presence of installation errors, the floating joint’s internal spherical structure automatically adjusts.
4. It absorbs eccentricity, offset, and angular deviation.
5. Driving force is transmitted, enabling smooth motion.

Typical Application Scenarios

1. Industrial Automation Production Lines In automated production lines for automotive manufacturing, electronic device production, etc., used to connect cylinders and actuators, compensating for installation errors. It protects cylinders from additional stress, prolonging equipment service life.
2. Packaging Machinery For controlling actions like material pushing, sorting, and palletizing in packaging machines. The floating joint connects the cylinder and actuator, ensuring smooth motion, improving production efficiency, and product quality.
3. Robotics Serves as a connector for robot end effectors, compensating for installation errors between the robot arm and the actuator. This improves the robot’s motion accuracy and repeat positioning precision.
4. Precision Manufacturing Equipment In equipment for semiconductor manufacturing, precision machining, etc., used to connect cylinders and precision actuators. It ensures stability and repeatability in the machining process, improving product quality.

Installation and Usage Precautions

1. Installation Requirements The floating joint should be connected to the cylinder piston rod via threads, ensuring the thread specifications match (M6×1). Pay attention to alignment during installation to avoid forced screwing that could damage the threads. Use two wrenches to secure the cylinder piston rod and the floating joint nut separately, preventing torsional stress from being transmitted into the cylinder.
2. Operating Environment The operating temperature range is -5 ~ 60°C. Avoid use in extremely high or low-temperature environments. Maintain relative humidity within an appropriate range to prevent moisture from affecting equipment lifespan. The working medium should be filtered through a 40μm or larger filter element before use.
3. Piping Connection Before piping, thoroughly blow or clean out cutting powder, cutting oil, dust, etc., from inside the pipes. When using threaded connections for piping and fittings, prevent chips from the threaded parts and fragments of sealing tape from entering the piping interior.
4. Regular Maintenance Regularly inspect the floating joint’s connection status to ensure no loosening. Periodically clean the floating joint surface to maintain cleanliness. Regularly check the floating joint’s operational performance to ensure long-term stable operation. Before reuse after prolonged shutdown, an inspection is recommended.
5. Safe Operation Ensure the equipment is properly grounded before operation to prevent electric shock risk. Avoid contact with moving parts during operation to prevent injury. In case of equipment failure, stop immediately for repair by qualified personnel. Before installation, depressurize to prevent high-pressure medium ejection causing injury. Strictly prohibit use beyond the product’s rated pressure, temperature, and medium range.

Concluding Summary

The JB25-6-100 floating joint is the “precision connection expert” in the field of industrial automation. It perfectly combines misalignment error compensation, high load capacity, compact design, and long life, providing efficient, reliable, and flexible connection solutions for various industrial applications.

Choosing the JB25-6-100 means choosing to drive your automation system towards higher efficiency with high reliability and high stability!

JB25-6-100

JB25-6-100

JB25-6-100-X11