619/8-2Z

The 619/8-2Z is a compact deep groove ball bearing with a single row and double-sided dust-proof cover. Its core function is to provide high-speed, bidirectional sealing protection and low maintenance rotational support for space-constrained small and medium-sized equipment and complex working conditions such as high dust and high humidity. With an accurate and compact size of 8mm inner diameter, 19mm outer diameter, and 6mm width, and a cylindrical hole design, it precisely fits the installation scenarios where there is limited space and requires comprehensive blocking of dust, water vapor, and tiny impurities from both sides. The core components are made of high-carbon chromium bearing steel (GCr15), with a hardness of 60-64 HRC. It is equipped with a steel plate stamping cage and 2Z-type double-sided stamping dust-proof cover, which combines high wear resistance, high rigidity, and all-round sealing protection performance. It can stably withstand radial loads and small bidirectional axial loads, and can firmly lock the pre-filled special low-viscosity lithium-based lubricating grease through the double-sided dust-proof cover to prevent lubricating medium leakage and external contaminants from invading the raceway. This significantly extends the maintenance-free period and service life. Its basic rated dynamic load is approximately 1.45 kN, and the basic rated static load is approximately 0.63 kN. The reference rotational speed can reach 85,000 r/min, and the maximum rotational speed is 53,000 r/min. After precision grinding of the raceway, the running noise and vibration are extremely low, meeting the requirements for high-speed stable operation under light to medium loads. It is widely used in general mechanical manufacturing, micro motors, precision instruments and meters, small pumps and valves, automation equipment, electronic components, medical device accessories, smart home, automotive micro-components, laboratory equipment, high-end toy manufacturing, communication equipment accessories, small testing instruments, machine tool auxiliary structures, and other industries, providing a core support solution with comprehensive protection, economicity, and long-term stability for small and medium-sized rotating structures in various fields.