619/7-2Z

The 619/7-2Z 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, double-sided dust-proof and low-maintenance rotational support for space-constrained small and medium-sized equipment and complex working conditions with high dust and impurity levels. With a compact size of 7mm inner diameter, 17mm outer diameter, and 5mm width, and a cylindrical bore design, it precisely fits the installation scenarios where there is limited space and a need to fully block dust and water vapor from invading 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, featuring high wear resistance, high rigidity, and double-sided 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 impurities from invading the raceway, significantly extending the maintenance-free period. Its basic rated dynamic load is approximately 1.12 kN, and the basic rated static load is approximately 0.42 kN. The reference rotational speed can reach 90,000 r/min, and the maximum rotational speed is 56,000 r/min. After precision grinding of the raceway, the running noise and vibration are extremely low, suitable for high-speed operation under light to medium loads, and widely used in general machinery 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, 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.