NNU 4930 BK/SPW33 cylindrical roller bearing is a separate bearing, which is very convenient for installation and disassembly. Cylindrical roller bearing can bear large radial load and is suitable for high-speed operation. It is applicable to large and medium-sized motors, rolling stock, machine tool spindles, internal combustion engines, generators, gas turbines, reduction boxes, rolling mills, vibrating screens and hoisting and transportation machinery.