618/9-2Z

618/9-2Z is a miniature deep groove ball bearing with a double-sided metal dust-proof cover. Its core feature is a high-protective, precision, and lightweight bearing designed for use in confined spaces. With a compact size of 9mm inner diameter, 17mm outer diameter, and 4mm width, it can easily fit into the narrow installation cavities of micro machinery. The lightweight design does not increase the overall load of the equipment. The double-sided metal dust-proof cover adopts a non-contact protective structure, which can block dust, debris, etc., from entering the bearing interior in both directions, minimizing the wear on the raceways and steel balls, extending the service life, and avoiding the increase in frictional resistance caused by contact seals, ensuring the high-speed operation capability of the bearing. It is suitable for general cleanliness, no waterproof requirement, but requires two-way basic protection scenarios. This bearing can stably withstand radial loads and also handle small bidirectional axial loads. The chromium steel material gives it good durability, meeting the core requirements of micro equipment for smooth rotation, speed, and low noise. It is specifically adapted for small motors, office equipment, handheld lightweight tools, precision instruments, automated micro components, etc. It solves the installation problem of space constraints and further extends the equipment maintenance cycle through the double-sided dust-proof design. Additionally, it is compatible with international standard specifications and can be interchanged with the same model bearings from international brands, with low replacement costs. Compared to open or single-sided dust-proof bearings, its protection is more comprehensive, and compared to sealed bearings, it has a more favorable cost advantage. It is the preferred economical option for micro equipment with bidirectional protection needs and a focus on high性价比. It balances practicality and procurement economy.