Detailed Product Description
Cylindrical Roller Bearing belongs to separable
bearings, it is convenient to mount and dismount. they can be
grouped into single-row (one-row), double-row,
four-row series. Subject to the different rib, there are N, NU, NJ,
NF an NUP series. It can accommodate mainly radial load, some
single-directional bidirectional axial load owing to the structure
of rib. Double row cylindrical roller bearings NN and NNU series
own the compact configuration, strong rigidity and high loading
capacity; most are used on machine tool spindles. FC, FCD and FCDP
four-row series can endure big axial load and are mainly used on
heavy machines for example rolling mills. Cylindrical
roller bearings are mostly used on kinds of industrial
machines .such as motors, machine tool spindles, oil machine,
rolling mills, loading and moving machine
The rollers in a single row cylindrical roller bearing are
always guided between the integral "open" flanges on one of the
rings. These "open" flanges combined with the specially designed
and surface treated roller ends, provide improved lubrication,
reduced friction and consequently lower operating temperature.
The ring with the integral flanges together with the cylindrical
roller and cage assembly can be separated from the other ring. This
results in easy mounting and dismounting, particularly where the
load conditions are such that interference fits are required for
both rings.
single row cylindrical roller bearings can accommodate heavy
radial loads and high speeds. They are manufactured in several
different designs, the main difference being in the configuration
of the flanges. The most popular are the NU, N, NJ and NUP
designs.
NU design
The outer ring of bearings of the NU design has two integral
flanges and the inner ring is without flanges. Axial displacement
of the shaft with respect to the housing can be accommodated in
both directions within the bearing itself. The bearings are
therefore used as non-locating bearings. For manufacturing and
maintenance reasons, the two outer ring flanges of large-size
bearings of the NU design which are identified by a Drawing No. may
not be integral but take the form of loose flange rings.
N design
The inner ring has two integral flanges and the outer ring is
without flanges . Axial displacement of the shaft with respect to
the housing can be accommodated in both directions within the
bearing itself. The bearings are therefore used as non-locating
bearings.
NJ design
The outer ring has two integral flanges and the inner ring one
integral flange. The bearings are therefore suitable for the axial
location of a shaft in one direction, see also under "Dynamic axial
load carrying capacity".
NUP design
The outer ring has two integral flanges and the inner ring one
integral flange and one non-integral flange in the form of a loose
flange ring The bearings can be used as locating bearings, i.e.
they can provide axial location for a shaft in both directions, see
also under "Dynamic axial load carrying capacity".
|