Cylindrical roller and race is line contact, great capacity of radial load. Applies to carry heavy load and impact load, also suitable for high speed rotation. Cylindrical roller bearing raceway and rolling body geometry. After improving design, has high bearing capacity, guard and roller end face of the new structure design, not only can improve the bearing axial bearing capacity, at the same time improve the roller end face and guard contact area of the lubrication conditions, improve the use of bearing performance. Cylindrical roller and race for line contact bearing. Load capacity is big, mainly bear radial load. Roller and ring guard friction small, suitable for high speed rotation. May according to the ring presence of guard, NU, NJ, NUP, N, NF, such as single row cylindrical roller bearings, double row cylindrical roller bearing and NNU, NN and other. The bearing inner ring and outer ring is separable structure. No guard of cylindrical roller bearing inner ring or outer ring, internal ring and outer ring can be to relative axial movement, so can be used as free end bearing. The one side of the inner ring and outer ring with double guard, on the other side of the ring has a single guard cylindrical roller bearing, can withstand a certain degree of axial load in one direction. General use of stamping steel cage, cage or copper alloy car system entities. But there are also part of the use of polyamide forming keep frame. Usually used for large and medium-sized motor, locomotives, spindle, internal combustion engines, generators, gas turbines, reducer, rolling mill, vibrating screen and lifting transportation machinery, etc.