Page 160 - needle bearings

Machined ring needle roller bearings, separable Type
NTN

Machined Ring Needle Roller Bearings, Separable Type

The machined ring of this bearing type has no rib or and cage assembly separable from one another, and the
side plate and, hence, the outer ring and the needle roller inner ring can be press-fitted individually in a shaft or a
and cage assembly are separable from each other. housing. This could facilitate the bearing mounting work.
The outer ring can’t regulate axial displacement of the This bearing type is suitable for an application requiring
needle roller and cage assembly and, therefore, the high running accuracy because the resultant radial
bearing construction must be so designed that the needle clearance can be retained in a narrow range by selection
roller and cage assembly can be guided by a shaft or a and combination of appropriate inner ring, outer ring and
housing. Furthermore, the outer ring, the needle roller needle roller and cage assembly.

Applied shaft Composition of
Bearing type diameter (mm) nominal bearing number Remarks
Type RNAO

П5ʙП100 RNAOʵ10ʷ17ʷ10 T2
Tail code
Width
Outer diameter
Bore diameter
Type RNAOʝZW
Type code
[Tail code]
T2 : Resin cage
П8ʙП80 ZW: Double-row type Bearing with tail code T2 uses a
polyamide resin cage and,
therefore, it shall be used at
allowable temperature 120˚C and,
under continuous running, at
100˚C and less.
Type NAO
For an application requiring high
running accuracy, manufacture of

the bearings conforming to JIS
Class-6, -5 and -4 is also available
П8ʙП90 NAOʵ10ʷ17ʷ10 ZW on special request.

Tail code
Width
Outer diameter
Bore diameter
Type NAOʝZW
Type code
[Tail code]
T2 : Resin cage
ZW: Double-row type
П10ʙП70

B-98