KOYO Bearing NU248

Photo may not represent actual item. See the technical specification for details.

Specifications of KOYO Bearing NU248

KOYO Bearing NU248

Specifications
(Boundary dimensions …etc)

d
240 mm
D
440 mm
B
72 mm
r(min.)
4 mm
r1(min.)
4 mm
Fw
295 mm
Ew
– mm
Basic load ratings : Cr
1170 kN
Basic load ratings : C0r
1340 kN
Fatigue load limit : Cu
150 kN
Limiting speeds(Grease lub.)
1200 min-1
Limiting speeds(Oil lub.)
1500 min-1
sd1
– mm
B1
– mm
B2
– mm

Mounting dimensions

da(min.)
– mm
db(min.)
256 mm
db(max.)
293 mm
dc(min.)
– mm
dd(min.)
– mm
Da(max.)
424 mm
Db(max.)
– mm
Db(min.)
– mm
ra(max.)
3 mm
rb(max.)
3 mm

Refer.

(Refer.)Mass
52.1 kg

Product description of KOYO Bearing NU248

KOYO Bearing NU248, Cylindrical roller bearings Single-row NU,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.

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 NU248, Cylindrical roller bearings Single-row NU, 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.

●The NU and N types exhibit their best performance when used as free side bearings since they adjust to the shale's axial movement, to a certain extent, relative to the housing position.
●The NJ and NF types carry axial load in cone direction, while the NUP and NH types can carry a certain degree of axial load in both directions.
●Type R cylindrical roller bearings feature enhanced load rating compared with standard series, though both have equal dimensions.

This is because type R bearings have afferent internal design. They are identified by supplementary code "R".

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