| Model No. | NU344 |  |
| Inside Dia | 220 mm |
| Outside Dia | 460 mm |
| Width | 88 mm |
| Mass | 72.5 |
| OEM Service | FAG TIMKEN NSK NTN KOYO NACHI |
| Cage | Machined brass |
| Structure | NU;NJ |
Cylindrical roller bearings without outer ring capped edge
The NU cylindrical roller bearing has double capped edges on outer
ring and without capped edge on inner ring
The N cylindrical roller bearing has double capped edges on inner
ring and without capped edge on outer ring
The NU and N cylindrical roller bearings, the shaft is allowed
two-way displacement toward the bearing box, i.e. the cylindrical
roller bearings can bear the change of shaft length due to thermal
expansion. Thus It is suitable to serve as a non-fixed bearing. It
can bear larger radial load, but cannot take axial load.
Cylindrical roller bearings with capped edge on both outer ring and
inner
The NJ cylindrical roller bearing has double capped edge on outer
ring and single capped edge on inner ring.
The NF cylindrical roller bearing with the single capped edge on
outer ring & double capped edges on inner ring
The NJ & NF cylindrical roller bearing, the axial-displacement
of the shaft or housing on one-direction can be limited. The
one-direction axial positioning can be reached. It can burden
smaller axial load from one-direction.
The NUP cylindrical roller bearing with double capped edges on the
outer ring & with capped edge on one side of the inner ring, as
well as with inner ring loose rib on the other side of the inner
ring. The two-way axial positioning toward the shaft can be
reached. The bearing can bear two-way axial force. The NUP & N
cylindrical roller bearings can be chosen for the structure. The NJ
and HJ cylindrical roller bearing with separate thrust collar is
similar to the NUP cylindrical roller bearing, it can be used as
the fixed (positioning) bearing.
Cylindrical roller bearings without inner ring or without outer
ring
The RNU cylindrical roller bearing has an outer ring with double
capped edges but does not come with inner ring. Such bearing is the
NU cylindrical roller bearings without the inner ring
The RN cylindrical roller bearing has an inner ring with double
capped edge but does not come with outer ring.
The RNU and RN cylindrical roller bearing are used with a component
having a limitation on radial dimension. The axial journal or the
surface of the housing bore can be used as the raceways. The
hardness and the machining precision as well as the surface quality
should be same as the raceways of the inner ring and the outer
ring.
Single row cylindrical roller bearing NU,NJ,NUP,N designs
Double row cylindrical roller bearings,NN and NNU designs
Single row full complement cylindrical roller bearing,NCF and NJG
designs
Double row full complement cylindrical roller bearing,NNF design
Four row cylindrical roller bearing
Six row cylindrical roller bearing
