20*47*14 Cylinder roller bearing N204E

Brief introduction:

The rolling elements are cylindrical roller radial bearings. The internal structure of the cylindrical roller bearing uses rollers arranged in parallel, with spacers or spacers installed between the rollers, which can prevent tilting of the rollers or friction between the rollers, effectively preventing the increase of rotational torque.

Cylindrical rollers and raceways are linear contact bearings. Load capacity, mainly bear radial load. The friction between the rolling body and the ferrule is small, suitable for high-speed rotation. According to the presence or absence of ribs, it can be divided into NU, NJ, NUP, N, NF and other single-row cylindrical roller bearings, and NNU, NN and other double-row cylindrical roller bearings. The bearing has a separable inner ring and outer ring structure.

Cylindrical roller bearings with no ribs on the inner or outer ring can move axially relative to the inner and outer rings, so they can be used as free-end bearings. Cylindrical roller bearings with double ribs on one side of the inner ring and outer ring and a single rib on the other side of the ring can withstand a certain degree of axial load in one direction. Generally use steel plate stamping cage, or copper alloy car body cage. But some also use polyamide forming cages.

Types:

N, NU type

N-type bearings have no ribs on the outer ring and ribs on both sides of the inner ring. It can allow the displacement of the shaft relative to the bearing seat in both axial directions.

NJ, NF type

NJ bearings have ribs on both sides of the outer ring, and ribs on one side of the inner ring.

NUP, NFP type

NUP type bearings have ribs on both sides of the outer ring, a single (fixed) rib on one side of the inner ring, and a detachable flat ring on the other side. Can withstand a certain amount of bidirectional axial load.

NH (NJ + HJ) type

The NH type bearing is the structure of the combination of the NJ type bearing and the HJ type inclined ring. Because the inner ring of the NUP type bearing is short, and the flat retaining ring is not fixed, it is not convenient to use, and the NH type bearing can use the width of the entire inner ring of the NJ type bearing to maintain a tighter fit with the shaft. And NH type bearing is more convenient in installation and disassembly.

Application

Large and medium-sized electric motors, rolling stock, machine tool spindles, internal combustion engines, generators, gas turbines, reduction gears, steel rolling mills, vibrating screens, and lifting and transportation machinery.