BYB roller bearing is a bearing unit composed of machined thick wall outer rings, needle or cylindrical rollers, or cages guided or fully loaded with rolling element groups, inner rings or bolts, and seals. It can withstand high radial loads and certain impact loads, with compact and diverse structures, high rotational accuracy, wide variety, wide adaptability, and easy installation. Widely used in machine tools, metallurgical machinery, textile machinery, printing machinery and other mechanical equipment and processing lines.