FAG super-precision cylindrical roller bearings are used in occasions with high precision requirements, and are often used in machine tools and printing machinery. They are ideal floating bearings because the linear expansion during operation can be compensated by the float between the rollers and the raceways. Due to their high precision and high radial stiffness, super-precision cylindrical roller bearings can be used not only as floating bearings, but also in bearing arrangements with the following requirements: Radial stiffness High load-carrying capacity High-precision single-row N10 series and double-row The NN30 series are all FAG super-precision bearings; there are also the N19 series and the NNU49 series, which have a smaller cross-sectional area and are more suitable for use in multi-spindle arrangements with small shaft spacing. Bearings of dimension series not shown in this catalogue can also be supplied by agreement if required. The single row N10 and N19 series can withstand very high radial loads, the inner ring guides the rollers, and the cage material is brass or PEEK. The double row NN30 is also an inner ring guide roller, the outer ring has a ground cylindrical profile and is removable. NNU49 is just the opposite, the outer ring guides the rollers and the inner ring has a ground cylindrical profile and is removable. These cylindrical roller bearings are designed according to the following criteria: Accuracy class SP Tapered bore (taper 1:12), the required preload or radial clearance can be adjusted by the bearing position of the inner ring on the shaft; (for Special requirements) or cylindrical inner hole solid brass cage or PEEK cage radial clearance C1. The special design of high-speed cylindrical roller bearings N10..-HS series bearings can achieve higher speeds. Using steel rollers and PEEK cages, the speed can be 60% higher than that of ordinary cylindrical roller bearings. Hybrid cylindrical roller bearings FAG hybrid cylindrical roller bearings have rollers made of high-performance ceramics. Ceramic rollers greatly reduce friction and wear inside the bearing, resulting in lower lubricant requirements and lower temperature rise. Hybrid cylindrical roller bearings are designed to achieve the maximum possible speed of cylindrical roller bearings. Due to the small thermal expansion coefficient of ceramic rollers, the effect of increased preload caused by temperature rise can be reduced. The operating life of the spindle and machine is significantly increased, improving the economic performance of the entire system. In addition, ceramic rollers improve static and dynamic rigidity. These have a positive effect on the machining quality. Cylindrical roller bearings with half the number of rollers According to the H193 specification, hybrid cylindrical roller bearings and high-speed cylindrical roller bearings are filled with only half the number of rollers as standard superfinished cylindrical roller bearings. The reduction in the number of rollers further increases the speed capability of the bearing, although the radial stiffness is reduced. These HCN..-H193 and N10..-HS-..-H193 series cylindrical roller bearings are mainly used in high-speed spindles of machine tools. Due to the high surface quality of the raceways and rollers, FAG cylindrical roller bearings are particularly suitable for grease lubrication. Requirements for bearing peripheral components, bearing tolerances, clearances and other recommendations can be found in later chapters. For oil-air lubrication, we also offer bearings in direct-lubricated form (DLR).