619/3-2Z

The 619/3-2Z is a small single-sided deep groove ball bearing. Its core function is to provide high-speed, low-friction, long-lasting rotational support for precision small equipment with limited space and higher requirements for dust protection. With a 3mm inner diameter, 8mm outer diameter, and a compact size of 3mm, it precisely fits the assembly scenarios that are highly demanding in terms of sealing protection and space utilization. The core components are made of high-carbon chromium bearing steel (GCr15), and an optional stainless steel material (SUS440C) is available. It is combined with a steel plate stamping cage and a 2Z-type double-sided stamping dust cover to form a dual-sealing barrier, which can effectively prevent dust and tiny impurities from entering, reduce lubricant leakage and internal part wear, and significantly improve operational stability and service life. Special low-viscosity lithium-based lubricating grease is pre-filled to achieve low-noise operation and is suitable for light load conditions. It has the advantages of a simple structure, convenient installation, and low maintenance costs. It can withstand both radial loads and small bidirectional axial loads and is widely used in miniature motors, precision instruments and meters, sensors, portable electronic devices, medical micro-instruments, high-end toys, laboratory equipment, small precision devices, etc., providing long-lasting support with high protection and reliability for small rotating structures.