Page 92 - needle bearings

Drawn cup needle roller bearings
NTN

Drawn Cup Needle Roller Bearings

This bearing type is composed of an outer ring drawn Usually design is so made as to use a shaft as the
from a thin steel plate by precision drawing, needle rollers direct raceway surface without using inner ring. The
and a cage assembled in the outer ring after the raceway outer ring of this bearing type is of such a construction
surface thereof was hardened. Of the bearings with outer that the needle rollers and the cage are not separated
ring, this bearing type is a bearing with the smallest from one another, so that the bearing is only press-fitted
section height which enables space-saving and cost- in a rigid housing with proper fit torque. Thus, this
saving. bearing type needs no snap ring, etc. to fix itself in axial
direction and, in addition, is easy to handle.

Applied shaft Composition of Nominal Code items

Type of bearing Remarks
diameter (mm) nominal bearing number bearing number and dimensions
HK HK 06 09 T2
ʢHKʝT2ʣ
The bearings with tail
Tail code
code T2 using polyamide
Width Inscribed circle
resin cage shall be used
Inscribed circle diameter :П6
Open end П3ʙП50 diameter HK0609T2 Width : 9 at allowable temperature
Type code T2 : Resin cage 120˚C and, under
continuous running, at
[Tail code] 100˚C and less.
T2 : Resin cage
C : Welding cage
HKʝL
HK 20 18 L This seal type (Tail code :
L or LL) synthetic rubber
Inscribed circle
Tail code seal built in at its single
Open end П12ʙП50 Width HK2018L diameter :П20 side or double sides is
single side seal Width : 18
Inscribed circle internally filled with lithium
diameter L : single side seal soap base grease.
Type code The operating temperature
Standard series 100˚C maximum to
shall range from -25 to
prevent deterioration of
HKʝLL HK 20 20 LL the seal and filled-up
grease.

Inscribed circle The roller length and rated
Tail code
Open end П12ʙП50 Width HK2020LL diameter :П20 load of this bearing type
double-side seal Width : 20 are shorter and smaller
Inscribed circle
diameter LL: Double-side seal than those of the open
Type code type of same dimension.

HKʝZWD
HK 20 30 ZW D
Inscribed circle
diameter :П20
Tail code
Width : 30
Open end Tail code This type is provided with
П15ʙП30 HK2030ZWD ZW : Double-row
double-row type Width cage oil hole on its outer ring.
Inscribed circle D : Outer ring with
diameter oil hole
Type code

B-30