Cylindrical roller bearings
● Product description
Cages: Standard cages for single row cylindrical roller bearings are listed in the table below. The cages of NU, NJ, NF and NUP bearings are usually the same as those of N-type bearings.
Clearance: The standard product of a single row cylindrical roller bearing has a basic group clearance. Single row cylindrical roller bearings can also provide C3 group clearance, and some can also provide larger C4 group clearance. The standard products of double row cylindrical roller bearings have C1 group clearance, C2 and C3 group clearance products can also be provided for cylindrical holes, and C2 group clearance products can also be provided for tapered hole bearings
Tolerances: Production of single row cylindrical roller bearings with tolerances below P5. At the same time, it produces single-row cylindrical roller bearings and double-row cylindrical roller bearings with cone holes in inner rings for machine tool spindles with tolerances of P5 and above, SP and UP
● Product features:
Cylindrical roller bearings are divided into: single row cylindrical roller bearings, double row cylindrical roller bearings, four row cylindrical roller bearings three categories
NU type bearing has two sides of the outer ring with guard, the inner ring without guard. The inner ring of N-type bearing has two sides of the guard, and the outer ring has no guard. Therefore, in a certain range, the shaft is allowed to make two-way axial displacement relative to the bearing box, that is, it can withstand the length change of the shaft caused by thermal expansion. Therefore, it is suitable for non-positioning bearings.
NJ type cylindrical roller bearing has a guard on both sides of the outer ring and a guard on one side of the inner ring. NF type cylindrical roller bearing has a guard on both sides of the inner ring and a guard on one side of the outer ring. Therefore, the shaft of the machine can provide axial positioning in one direction.
NUP type cylindrical roller bearing has a guard on both sides of the outer ring, a guard on one side of the inner ring, and a movable guard on the other side. Therefore, the bearing can be bidirectional positioning of the machine shaft. It also produces high-precision single-row cylindrical roller bearings with 1:12 tapered holes in the inner ring for machine tool spindles.
Double row cylindrical roller bearings, the production of double row cylindrical roller bearings are precision bearings for machine tool spindle, can also be used for other precision machinery. NN type has an inner ring with a guard and an outer ring without a guard. The NNU type has an outer ring with a guard and an inner ring without a guard. In order to facilitate the user to install the lubrication device, the structure with the oil groove and oil hole in the outer ring is mainly (suffix code W33 type), and the products can be provided with two structural forms of cylindrical holes and conical holes according to user needs.
