Cylindrical roller and raceway for line contact bearings. ? heavy load capacity, mainly bear radial load. The friction between the rolling body and the ring block is small and suitable for high speed rotation. According to the ring has no stalls, there are NU, NJ, NUP, N, NF and other single row bearings, and NNU, NN type double row bearings. The inner and outer ring of the bearing can be separated. Cylindrical roller bearings without inner sides of the inner ring or outer ring, whose inner and outer rings can be moved relative to the axial direction, so they can be used as free end bearings. In the inner or outer part of the side of a double side, ? the other side of the ring has a single block cylindrical roller bearings, can bear a certain degree of axial load in one direction. Double row cylindrical roller bearings, high rigidity for radial load, mainly used for spindle of machine tools. Generally use a steel stamping holder or a copper alloy car holder. But some also use polyamide forming cages. According to whether or not the cylindrical roller bearing ring is blocked, it can be divided into the following shapes.
NU, N, NNU and NN are suitable for free side bearings. Type NJ and NF can bear axial load of one direction to a certain extent, and NH and NUP are used as fixed side bearings. NH cylindrical roller bearings are made of NJ cylindrical roller bearings and L - shaped barrier rings. NUP type bearings, when installing, please insert the lettering side of the retaining ring outwards.
