619/2

619/2, as a super-miniature single-row deep groove ball bearing, its core function is to provide reliable rotational support with high speed, low friction and lightweight for micro precision equipment with extremely limited space. With its ultra-compact design of 2mm inner diameter, 6mm outer diameter and 2.3mm width, it precisely fits into micro assembly scenarios where conventional-sized bearings cannot be accommodated. This bearing is made of high-carbon chromium bearing steel (GCr15) for the rings and rollers, and after ultra-precision machining and heat treatment, it ensures excellent wear resistance and dimensional stability. Combined with a micro-specific precision resin cage, it not only reduces the overall weight but also minimizes friction and impacts during the rotation of the rollers. The pre-filled low-viscosity special lubricating grease further reduces the friction coefficient, achieving low noise operation and meeting the silent requirements of precision equipment. Its basic rated dynamic load is 0.22kN, and the basic rated static load is 0.065kN. Although it focuses on ultra-light load conditions, the reference speed can reach 180,000 r/min, and the maximum speed is 100,000 r/min. It can efficiently meet the high-speed rotation requirements of micro mechanisms and can simultaneously withstand radial loads and small bidirectional axial loads. It has the advantages of simple structure, convenient installation, and low maintenance cost. It is widely used in micro motors, precision instruments and meters, micro sensors, core components of high-end micro toys, portable electronic devices, medical micro instruments, laboratory micro mechanical devices, micro transmission mechanisms, aerospace micro components, micro robots, and other fields. It provides stable and long-lasting support for various ultra-small rotating structures, and is a key basic component for enabling smooth rotation functions in micro devices.