619/8

619/8, as a general-purpose single row deep groove ball bearing, its core function is to provide compact, low-friction, high-speed, and stable reliable rotational support for space-constrained small and medium-sized equipment and various general working conditions. With an inner diameter of 8mm, an outer diameter of 19mm, and an accurate size of 6mm, it precisely fits various transmission structures with strict installation space requirements and the pursuit of convenient assembly. The core components are made of high-carbon chromium bearing steel (GCr15), and are paired with a steel plate stamping cage. They have a high hardness of 60-64HRC, excellent wear resistance and mechanical strength. The structure is simple, sturdy, and has low maintenance costs. They can stably withstand radial loads and can also bear a small amount of bidirectional axial loads. After precision grinding of the raceway, the running noise and vibration are extremely low. The pre-filled special low-viscosity lithium-based lubricating grease further optimizes the friction coefficient, extending the long-term service life of the bearing. Its basic rated dynamic load is approximately 1.45kN, the basic rated static load is approximately 0.63kN, the reference rotational speed can reach 90,000r/min, the maximum rotational speed is 56,000r/min, and it is suitable for high-speed operation under light to medium loads. It is widely used in various 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 generality, economy, and stability for small and medium-sized rotating components in different fields.