KOYO Bearing NNU49/670

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Specifications of KOYO Bearing NNU49/670

KOYO Bearing NNU49/670

(Boundary dimensions …etc)

670 mm
900 mm
230 mm
6 mm
732 mm
– mm
Basic load ratings : Cr
5270 kN
Basic load ratings : C0r
14100 kN
Fatigue load limit : Cu
1190 kN
Limiting speeds(Grease lub.)
320 min-1
Limiting speeds(Oil lub.)
390 min-1

Mounting dimensions

694 mm
726 mm
740 mm
876 mm
– mm
5 mm


420 kg

Product description of KOYO Bearing NNU49/670

KOYO Bearing NNU49/670, Cylindrical roller bearings Single-row NNU,Cylindrical roller bearings have line contact between the rollers and raceway, therefore radial load capability is high, making this bearing superior in regards to its ability to withstand heavy loads and impact loads. Moreover, mounting and removing is easy due to the inner ring and outer ring being separable. And you may also like related type KOYO Bearing NNU49/710.

The utility model relates to a bearing, in particular to a single-row cylindrical roller bearing which comprises a single-row outer ring and a single-row inner ring. A plurality of rollers are positioned between the inner ring and the outer ring, retainers are positioned between the rollers, the outer ring is provided with double flanges, and the inner ring is provided with a single flange. One end of the inner ring, which is not provided with a flange, is provided with a flat check ring. Practical application shows that when the single-row cylindrical roller bearing is applied to a sludge pump, the service life of the single-row cylindrical roller bearing is several times longer that an original 62938 bearing. Thus, auxiliary time for replacing the bearing is greatly reduced, cost of spare parts is saved, and production requirements of customers are met.

KOYO Bearing NNU49/670, Cylindrical roller bearings Single-row NNU, Cylindrical roller bearings feature high radial load capacity because the roller and raceway are in linear contact. These bearings are suitable for applications that involve heavy radial and impact loading. They are also appropriate or high-speed applications in that they can be machined very accurately due to their structure. Having a separable inner ring or outer ring, these bearings can be mounted and dismounted easily.

KOYO Bearing NNU49/670, Cylindrical roller bearings Single-row NNU, The utility model provides a single-row cylindrical roller bearing with a novel holder. The single-row cylindrical roller bearing comprises an inner ring, cylindrical rollers, the holder and an outer ring, and is characterized in that the holder is arranged between the outer ring and the inner ring, and the cylindrical rollers are inset in the holder; the holder is made from high-performance engineering plastic such as a PEEK (polyester-ether-ketone) resin, and is internally uniformly provided with a plurality of isolation pillars, the section of the holder is of an I shape, the middle parts of the isolation pillars protrude outward, and each cylindrical roller is inset between each two adjacent isolation pillars. The single-row cylindrical roller bearing provided by the utility model has the advantages that the heat resisting property, the intensity, the elasticity, the creep property, the fatigue property and other properties are excellent; meanwhile, the two ends of the holder are of I-shaped structures, and thus a dust-proof property of the bearing is increased.

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