619/8-Z

619/8-Z is a single-row deep groove ball bearing with a dust cover. Its core function is to provide a compact rotating support with low friction, high rotational speed, and convenient maintenance for small and medium-sized equipment with limited space and general working conditions requiring single-side dust prevention. With precise dimensions of 8mm inner diameter, 19mm outer diameter, and 6mm width and a cylindrical hole design, it precisely fits the assembly scenarios with limited installation space and the need to block dust and tiny impurities from one side. The core components are made of high-carbon chromium bearing steel (GCr15), with a hardness of 60-64 HRC. It is combined with a steel plate stamping cage and a Z-shaped single-sided stamping dust cover, featuring high wear resistance, high rigidity, and single-side 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 dust cover to prevent lubricating medium leakage and external impurities from entering the raceway, thereby extending the maintenance-free period. 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, suitable for high-speed operation under light to medium loads, and widely used in industries such as 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, machine tool auxiliary structures, etc., providing a core support solution with single-side protection, economy, and long-term stability for small and medium-sized rotating structures in various fields.