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Steel U/V Sealed Groove Ball Bearings U625ZZ U624ZZ Series Track Roller Bearings

Track Roller Bearings
December 26, 2025
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Brief: In this video, we provide an in-depth look at the U625ZZ and U624ZZ series of Steel U/V Sealed Groove Ball Track Roller Bearings. You'll see a detailed demonstration of their compact design, precision engineering, and how their optional U or V grooves interface with guide rails in small-scale automation and transmission systems. We'll also explain the benefits of their double metal seals and pre-lubrication for stable, low-friction performance in confined spaces.
Related Product Features:
  • Available in models U623ZZ, U604ZZ, U624ZZ, and U625ZZ with customizable U or V groove structures.
  • Constructed from premium GCr15 bearing steel for durability and stable rolling performance.
  • Features double-sided metal seals (ZZ) to effectively block dust and contaminants.
  • Pre-filled with high-performance lithium-based grease for long-term, maintenance-free lubrication.
  • Compact dimensions ideal for small equipment with limited installation space.
  • Precision raceway grinding and heat treatment ensure low friction and reliable operation.
  • Designed for light-load applications in automation, electronics, and precision instruments.
  • Interchangeable with equivalent SKF and INA series for versatile integration.
FAQs:
  • What is the difference between U-groove and V-groove in this series?
    U-groove is designed for flat-bottomed guide rails, while V-groove matches V-shaped guide rails. Both can be customized based on your equipment's guide rail structure.
  • Can these bearings be used in high-speed scenarios?
    No, they are intended for light-load, low-to-medium speed applications with a limit speed of approximately 8000 r/min under grease lubrication. They are not recommended for high-speed rotating equipment.
  • Is the lubrication of these bearings maintenance-free?
    Yes, they are pre-filled with lithium-based grease and sealed with ZZ, requiring no additional lubrication during their service life under normal light-load conditions.
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