cylindrical roller bearings
cylindrical roller bearings
Author :Admin | Publish Date:2013-03-20 15:53:20
Cylindrical Roller Bearings are bearing in which cylinders are used as the
rolling elements as opposed to balls in ball bearings. As such, the rollers have
a greater (linear) contact area with the outer ring and are distribute loads
across a broader surface. Subsequently, they have a relatively high radial load
capacity and are suitable for high speeds. Double-row [cylindrical roller bearings] have high radial rigidity and
are used primarily for precision machine tools.
There are different types designated NU, NJ, NUP, N, NF for single-row
bearings, and NNU, NN for double-row bearings depending on the design or absence
of side ribs. AST’s cylindrical roller bearings come in the following series with various cage designs and Metric
dimensions:
•N Series - Bearings of N design are single row cylindrical roller bearing
and have two fixed ribs on the inner ring that retain the rollers and cage and
one smooth outer ring. This design allows an axial displacement in certain
limits, of the shaft in relation to the housing. Therefore, N Series rolling
bearings are used in non-locating bearing units. Also, the N Series bearings
have virtually no thrust capacity.
•NU Series - Are single row cylindrical roller bearings and have two fixed
ribs on the outer ring and one smooth inner ring. This design allows an axial
displacement in certain limits, of the shaft in relation to the housing.
Therefore, NU Series rolling bearings are used in non-locating bearing units.
Also, the NU Series bearings have no virtually thrust capacity.
•NJ Series - Are single row cylindrical roller bearings and have two fixed
ribs on the outer ring and a fixed rib on the inner ring which can guide the
shaft in a single direction (axially).
•NUP Series - Are single row cylindrical roller bearings and have two fixed
ribs on the outer ring and, on the inner ring, a fixed rib and a support washer.
This way they can be used as locating bearings, guiding the shaft axially in
both directions.
•RNU Series - Are single row timken
bearings and have two fixed ribs on the outer ring and has no inner ring.
Instead, it uses the shaft as the opposing raceway.
•NF Series - Also able to carry incidental thrust loads, this bearing type
features two integral ribs on the inner ring and a single rib on the outer
ring.
•NN Series - Bearings of NN design are double row cylindrical roller
bearing and have three fixed ribs on the inner ring that retain the rollers and
cage and one smooth outer ring. This design allows an axial displacement in
certain limits, of the shaft in relation to the housing. Therefore, N Series
rolling bearings are used in non-locating bearing units. Also, the NN Series
bearings have no virtually thrust capacity.
•NNU Series - Are double row cylindrical roller bearings and have three
fixed ribs on the outer ring and one smooth inner ring. This design allows an
axial displacement in certain limits, of the shaft in relation to the housing.
Therefore, NU Series rolling bearings are used in non-locating nsk bearing units. Also, the NNU Series bearings have no
virtually thrust capacity.
6304/22 2RSC3
83A694CS30
83B218CS16
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