The SKF 6318 is a single-row deep-groove ball bearing without a sealing structure. With an inner diameter of 90mm, an outer diameter of 190mm, and a thickness of 43mm, it is made of GCr15 high-carbon chromium bearing steel with a pressed-steel cage. It is suitable for medium-to-high-speed and medium-to-heavy-load operations in dry and clean environments, such as on machine tool spindles, motor rotor shafts, and industrial fan shafts. It can withstand radial and bidirectional axial loads, featuring a low friction coefficient, good speed adaptability, and a long service life.