Hollow Shaft Magnetic Powder Brake 6Nm-400Nm for Precision Tension Control

XW Machinery Hollow Shaft Magnetic Powder Brake

The XW Machinery Hollow Shaft Magnetic Powder Brake is a precision torque control device designed for web tension control applications. Utilizing high-quality magnetic powder and advanced electromagnetic technology, it provides smooth and stable braking torque for winding, unwinding, slitting, printing, packaging, paper converting, textile processing, and lithium battery production lines.

The hollow shaft design allows convenient installation on through shafts, reducing machine footprint while improving integration flexibility. With torque ranges from 6Nm to 400Nm, the brake delivers highly responsive and accurate tension control throughout the production process. Magnetic particle brakes are widely used because braking torque is proportional to excitation current, providing stable torque output independent of slip speed.

Key Features

Hollow Shaft Design

Compact structure allows easy installation in limited machine spaces while supporting through-shaft configurations.

Precision Torque Control

Provides accurate and repeatable braking torque through adjustable excitation current.

Stable Web Tension Control

Maintains consistent material tension during winding and unwinding operations, reducing wrinkles and material waste.

Wide Torque Range

Available from 6Nm to 400Nm to suit various industrial applications.

Fast Response Speed

Rapid torque adjustment improves production stability and control accuracy.

Long Service Life

Premium magnetic powder and precision bearings ensure extended operational life with minimal maintenance.

Low Noise Operation

Smooth torque transmission minimizes vibration and improves machine reliability.

Excellent Heat Dissipation

Designed for continuous industrial operation and demanding production environments.

Applications

Printing Machines

Maintain precise web tension for improved print quality and registration accuracy.

Slitting Rewinding Machines

Ensure uniform roll hardness and consistent winding quality.

Flexible Packaging Production

Control film tension during unwinding and rewinding operations.

Paper & Film Converting

Suitable for coating, laminating, slitting and converting processes.

Textile Machinery

Provide stable tension management for fabric winding systems.

Lithium Battery Manufacturing

Ideal for electrode coating, separator winding and roll-to-roll production lines.

Wire & Cable Processing

Ensure smooth tension control during winding and testing applications.

Technical Specifications:

Parameter	Value
Model	XW Series
Structure	Hollow Shaft
Torque Range	6Nm–400Nm
Voltage	DC24V
Cooling	Air Cooling
Application	Slitting / Rewinding
Operation	Continuous Slip

How Does a Hollow Shaft Magnetic Powder Brake Work?

• Magnetic powder is activated by electromagnetic coil
• Torque is generated through magnetic chain formation
• Output torque is proportional to excitation current
• Ensures stable web tension during operation

Typical application cases

• Printing industry: In flexographic printing machines, gravure printing machines, and label printing machines, constant tension control is used for unwinding or rewinding units to prevent paper/film deviation or breakage, improve printing quality and register accuracy.
• Packaging machinery: In slitting machines, rewinding machines, and bag making machines for packaging materials such as plastic film, composite film, and aluminum foil, stable tension is maintained to avoid material deformation or wrinkling and improve packaging yield.
• Coating and compounding: In coating machines, compounding machines, and laminating equipment, precise control of substrate tension ensures uniform coating and firm compounding.
• Other fields: textile warp and weft machines, cable winding and unwinding, metal strip processing, test bench load simulation, and other applications that require precise tension or torque control.

In practical use, many customers have provided feedback that after installing the XW Series magnetic powder brake, the scrap rate has decreased by 15% -30%, the production line speed can be steadily increased, and the overall equipment maintenance frequency has been significantly reduced.

This brake works with our magnetic powder clutches and tension controllers to form a complete web tension control system.

• Magnetic Particle Brake
• Magnetic Powder Clutch
• Tension Control System
• Web Tension Control
• Differential Shaft
• Air Expanding Shaft
• Slitting Machine Solutions

Why choose XW Series Hollow Shaft Magnetic Powder Brake?

1. It combines the advantages of high precision, long lifespan, and low maintenance, making it a reliable solution for tension control in the printing and packaging industry. Compared to traditional friction brakes, magnetic powder brakes have no abrasive particle pollution and are more suitable for high cleanliness requirements such as food packaging and pharmaceutical packaging.
   
2. Do you need more technical support, selection guidance, or customized hollow shaft dimensions? Welcome to contact us anytime. We provide professional one-on-one selection services and quick response.

Why Choose XW Machinery?

✔ DIN-standard manufacturing quality

✔ Stable torque output

✔ Long-life magnetic powder technology

✔ Custom torque configurations available

✔ OEM & ODM support

✔ Fast global delivery

✔ Professional technical assistance

XW Machinery provides reliable magnetic powder braking solutions for industrial automation, web handling, and precision tension control systems. Our hollow shaft magnetic particle brakes are engineered for durability, accuracy, and long-term operational stability.

Our factory has passed ISO9001 quality certification, ensuring quality assurance.

XW Series Hollow Shaft Magnetic Powder Brake - High precision tension control system from 6Nm to 400Nm
  The XW Series hollow shaft magnetic powder brake is designed specifically for roll processing equipment such as printing, packaging, coating, and slitting, providing precise and stable tension control. Adopting a hollow shaft design, it is easy to install directly on the machine spindle without the need for additional couplings, making installation simpler and the structure more compact.

By controlling the agglomeration state of magnetic powder through electromagnetic principles, non-contact and wear-resistant torque transmission can be achieved. The torque can be accurately adjusted within the range of 0-100%, with fast response speed and stable linear output torque, which is proportional to the excitation current. Especially suitable for high-precision tension control applications that require continuous slip operation.

Bullet Points

1. High precision tension control: The torque output is linearly related to the excitation current, with high control accuracy, and can achieve small tension adjustment, significantly reducing problems such as material wrinkles, fractures, or inaccurate overprinting.
2. Hollow spindle design: supports direct insertion through the machine spindle, with small installation space, suitable for various roll feeding systems, saving installation time and cost.
3. No contact or wear: Magnetic powder does not come into mechanical contact with the rotor, resulting in no traditional friction plate wear, long service life, and low maintenance costs.
4. Quick response: The torque almost instantly responds to changes in current, making it suitable for high-speed printing and packaging production lines that require rapid changes in tension.
5. Excellent heat dissipation performance: Optimized structural design, high heat dissipation efficiency, supports long-term continuous operation without overheating.
6. Stable and reliable: The torque output is not affected by the speed, and it maintains a constant torque during continuous slip operation without noise, vibration, or pollution.
7. Wide torque range: Single series covers 6Nm to 400Nm, meeting different needs from small batch label printing to large film packaging equipment.
8. Easy to integrate: Standard DC24V excitation voltage, compatible with most tension controllers, seamlessly integrated with automatic tension control systems.

Maintenance tips and usage recommendations

• Daily maintenance: Regularly check whether the excitation coil wiring is loose and keep the equipment surface clean. Magnetic powder is a consumable, and it is recommended to inspect and replenish/replace it appropriately every 1-2 years (or based on operating hours).
  
• Attention to heat dissipation: When operating with high slip power for a long time, ensure good ventilation around or install a fan to assist in heat dissipation to avoid overheating and affecting torque stability.
  
• Installation points: The hollow shaft should be installed concentric with the machine spindle to avoid vibration caused by eccentricity. Please follow the instructions for no-load running in before initial use.
  
•  Common problem handling: If the torque output is unstable, please first check if the input current is stable; If there is noise, it is usually due to aging of the magnetic powder, and it can be replaced in a timely manner.
  
• Longevity extension technique: Avoid prolonged operation beyond the rated slip power; Paired with high-quality tension controllers can further enhance system stability and brake lifespan.

FAQ

What is a hollow shaft magnetic powder brake?

A hollow shaft magnetic powder brake is an industrial torque control device designed for precise tension regulation in web handling systems. The hollow shaft structure allows direct mounting on machine shafts, making it widely used in slitting, rewinding, printing, coating, and packaging machinery where stable torque control is required.

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How does a magnetic powder brake work?

A magnetic powder brake works by applying DC current to an electromagnetic coil, which generates a magnetic field inside the brake chamber. The magnetic powder inside forms chain-like structures under the magnetic field, transmitting adjustable braking torque. The torque output is proportional to the excitation current, enabling precise and stable tension control.

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What is the advantage of hollow shaft design?

The hollow shaft design provides several key advantages:

• Easy direct shaft installation
• Compact and space-saving structure
• Improved alignment accuracy
• Stable torque transmission
• Reduced vibration during operation
• Easier integration into industrial machinery

This design is especially suitable for modern high-speed slitting and rewinding systems.

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How do I choose the correct torque range?

To select the correct torque range, consider:

• Material type and thickness
• Required web tension
• Roll diameter changes during operation
• Machine speed
• Continuous or intermittent operation
• Safety margin for load fluctuations

Choosing the correct torque ensures stable tension control, prevents material damage, and improves production quality. XW Machinery can assist in selecting the most suitable model based on your application.

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Can it be used in slitting machines?

Yes. Hollow shaft magnetic powder brakes are widely used in slitting machines to control unwinding tension. They ensure stable web tension, reduce material stretching or wrinkles, and improve winding quality during high-speed cutting operations.

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What materials are processed?

This type of brake is suitable for a wide range of web materials, including:

• Plastic film
• Paper
• Aluminum foil
• Copper foil
• Nonwoven fabric
• Adhesive labels and tapes
• Flexible packaging materials
• Wire and cable materials

It is commonly used in printing, laminating, coating, and converting industries.

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Does XW Machinery support OEM customization?

Yes. XW Machinery provides OEM and customized manufacturing services for hollow shaft magnetic powder brakes, including customized torque ranges, shaft dimensions, installation structures, voltage specifications, and application-specific designs. Technical support is available to match different industrial requirements.