NSK is a well-known Japanese manufacturer of bearings, including roller bearings. Roller bearings are designed to carry heavy loads by distributing the load over a larger surface area compared to ball bearings. They come in various types, including cylindrical, tapered, spherical, and needle roller bearings, each designed for specific applications. Cylindrical Roller Bearings: Feature cylindrical-shaped rollers that are in linear contact with the raceways. Suitable for high radial loads and can accommodate some axial displacement. Commonly used in electric motors, gearboxes, and pumps. Spherical Roller Bearings: Designed to handle both heavy radial loads and axial loads in both directions. Feature barrel-shaped rollers and are self-aligning, making them ideal for applications with shaft misalignment. Commonly used in mining, construction equipment, and conveyors.