624ZZ Ultra-Miniature Shielded Bearing 4×13×5mm

The 624ZZ ultra-miniature shielded bearing, measuring 4×13×5mm, has emerged as a paragon of precision within the esteemed realm of Small bearings. Its incredibly compact dimensions not only make it a standout in our diverse Small bearing lineup but also ensure it adheres to the same high - quality benchmarks as our Stainless steel bearings, thereby guaranteeing reliability and longevity. The double dust cover (ZZ) shielding structure, crafted from high-strength ultra-thin stamped steel, is seamlessly integrated with the bearing's inner and outer rings through nano-level welding technology. Certified with an IP54 protection rating, this structure acts as an impenetrable suit of armor, effectively fending off the intrusion of micron-sized dust particles and fine debris. Whether deployed in the ultra-clean environment of a semiconductor chip manufacturing workshop or within the dusty confines of a micro-machine, it safeguards the integrity of the bearing's internal precision components, significantly slashing equipment maintenance costs and minimizing downtime risks caused by impurities and wear.​

 

In terms of materials and manufacturing processes, this Ball bearing utilizes high-carbon chromium bearing steel of the same exacting standards as Stainless steel bearings. Through a series of meticulous procedures including vacuum quenching, tempering, and deep cryogenic treatment, its surface hardness reaches HRC60 - 62, forming a dense wear-resistant layer that endows it with excellent abrasion and corrosion resistance. As a distinguished member of the Ball bearing family, it is equipped with precision-grade G10 steel balls and features the classic symmetrical Deep groove raceway design characteristic of Deep groove ball bearings. Through repeated testing in professional mechanical laboratories and optimization via computer simulations, it has been proven capable of stably supporting a radial load of 0.6kN and an axial load of 0.22kN. During operation, its friction coefficient drops as low as 0.005. Even at a high rotational speed of 15,000 r/min, the vibration value remains ≤6m/s² and the noise level is ≤40dB, ensuring stable and efficient power transmission for high-precision, high-speed micro-transmission systems. This makes it an ideal choice for meeting the stringent requirements for operational accuracy and stability in precision optical instruments, micro-automation equipment, and more.​

 

Should your project have unique specification requirements, our Non-standard bearing customization service is ready to offer tailored solutions. Our team of professional engineers, leveraging advanced CAD/CAM design systems and extensive industry experience, provides comprehensive and personalized services. From optimizing material properties and innovating sealing structures to precisely customizing tolerance grades, we ensure that every aspect meets your specific needs. In the application of micro pump equipment, the 624ZZ ultra-miniature shielded bearing has undergone rigorous tests simulating high-frequency start-stop cycles and continuous vibration. Its dynamic load coefficient (C) reaches 0.75kN, and after 1200 hours of continuous operation, the change in bearing clearance is ≤0.005mm. This outstanding performance places it on par with our Water pump bearings, guaranteeing the long-term stable and efficient operation of micro water pump systems.​

 

From the precise operations of microscopic precision instruments to the core transmissions of industrial automation equipment, the 624ZZ ultra-miniature shielded bearing, with its exceptional performance, collaborates seamlessly with our full range of core products. Alongside our Stainless steel bearings, Ball bearings, Deep groove ball bearings, Non-standard bearings, Small bearings, and Water pump bearings, it forms a solid foundation for mechanical operations, propelling various industries towards new heights of efficiency and stability.