Stefa® Mini Radial Shaft Seals are crafted to deliver superior performance in demanding environments. Thanks to their innovative design and high-quality materials, these seals provide outstanding resistance to wear, contamination, and temperature fluctuations, ensuring reliability and extended service life for your robotic systems. With their compact form, they enable more efficient use of space without compromising on functionality or durability.

Features and Benefits

  • Exceptional Sealing Performance - Our seals provide reliable protection against grease and oil leakage, keeping contaminants out and ensuring smooth operations.  
  • Extended Maintenance Intervals - Designed for durability, these seals reduce the need for frequent replacements, saving time and costs over the long term.  
  • Miniature, Lightweight Build - Perfect for compact robotics, these seals reduce overall weight without sacrificing performance.  
  • Energy Efficiency - Low-torque designs mean high energy savings and fewer emissions.  
  • Optimized for High-Speed, Complex Motion - Supports oscillating and bidirectional movements for advanced robotics.  
  • Chemical Compatibility - Made with proprietary Trelleborg compounds, including food-grade and PFAS-free options, to cater to diverse industry needs.  
Download the brochure Stefa® Mini Radial Shaft Seals
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Webinar – Stefa® Mini Radial Shaft Seals

Our Trelleborg Sealing Solutions robotics experts and product engineers are hosting a free-to-attend webinar on April 15, 2025, to introduce this new family of seals and demonstrate how they meet the requirements of the robotics industry.
Register now

The Stefa® Mini Radial Shaft Seal Family

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Stefa® Mini Radial Shaft Seal

Precision and effective sealing for robotics  

 This seal offers: 

  • Metal inserts and springs in carbon steel or stainless steel for food applications  
  • Low torque for high-speed applications  
  • Outstanding durability and leakage prevention
Mini Cassette_cross-section

Stefa® Mini Cassette Seal  

Specially engineered for demanding environments

 This seal features: 

  • Preassembled radial shaft seal in a metal sleeve
  • Eliminates costly shaft surface preparation
  • Perfect for high-speed and high-acceleration movements
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Stefa® Nano Radial Shaft Seal  

For extreme space and weight constraints 

 This seal features: 

  • Very small 3x3 mm cross-section  
  • Enhanced durability and static sealing  
  • Ideal for robotic axis drives and compact designs  

Applications

Engineered to redefine performance in these advanced robotic components: 

 

  • Servo Motors: High torque, low-speed environments   
  • Gearboxes and Speed Reducers: For seamless transmission   
  • Industrial Automation Equipment: Where reliability is paramount   
  • Robotic Joints: Supporting precise, multidirectional movements   
  • Direct Drive Motors: Built for high-speed operation   
  • Servo Gear Motors: Optimizing accuracy in rotational mechanisms
Applications
Learn more about our products and solutions for factory automation robots