Page 11 - needle bearings

Classification and Characteristics of Bearings
NTN

Thrust roller bearing

This bearing comprises needle rollers or cylindrical
rollers, a cage to guide and retain properly the rollers,
and disc-shaped rolling bearing ring. This is a bearing
capable of supporting one-way axial load. Furthermore,
this bearing can be used without rolling bearing ring,
where the heat-treated and ground bearing mount
surface can be used as the raceway surface.
¡Best-suited to space-saving design due to its small
section height, then having the large load capacity.
¡Available are AS type rolling bearing ring made of
thin steel plate with hardened surface and WS type
and GS type machined rings.

Complex needle roller bearings ʕʕ Needle roller bearing with thrust bearing ʕʕ

This complex bearing comprises a radial needle roller
bearing for supporting radial load and a thrust bearing
for supporting axial load which are assembled integrally.
Both thrust ball bearing type and thrust axial roller
bearing type are available as the bearing intended to
support axial load.
¡The thrust bearing with dust-proof cover is also
available, which has a good effect in preventing
scattering of oil and grease and invasion of external
dust, etc.

Complex needle roller bearings
ʕ ʕ Needle roller bearing with angular ball bearing, needle roller bearing with three-point contact ball bearing ʕʕ

This complex bearing comprises a radial needle roller
bearing for supporting radial load, a ball bearing for
supporting comparatively small axial load and a
machined inner ring which are all assembled integrally.
Both angular ball bearing and three-point contact ball
bearing are available as the ball bearing intended to
support axial load.
¡The complex needle roller bearings (NKIA
Series)using an angular ball bearing as the thrust
bearing can support one-directional angular load.
¡The complex needle roller bearings (NKIB Series)
using a three-point contact ball bearing as the thrust
bearing can support double-directional axial load and
furthermore its position in axial direction can be fixed,
too.

Needle roller bearing with double thrust roller bearing
This is a complex bearing wherein a thrust needle
roller bearing or a thrust cylindrical roller bearing
intended to support axial load is configured at the double
sides of a radial needle roller bearing for supporting
radial load.
¡Can support large axial load acting thereon from the
double sides.
¡Used as the bearing (precision bearing) for supporting
the ball screw of a machine tool.

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