Page 93 - needle bearings

Drawn cup needle roller bearings
NTN

Applied shaft Composition of Nominal Code items
Type of bearing Remarks
diameter (mm) nominal bearing number bearing number and dimensions
HMK
ʢHMKʝT2ʣ
HMK 20 15
The bearings with tail
code T2 using polyamide
Inscribed circle resin cage shall be used
Open end П8ʙП50 Width HMK2015 diameter :П20 at allowable temperature
Inscribed circle Width : 15 120˚C and, under
diameter
continuous running, at
Type code
100˚C and less.
HMKʝL

HMK 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 diameter :П20
П8ʙП50 Width HMK2018L side or double sides is
single side seal Width : 18
Inscribed circle L : single side seal internally filled with lithium
diameter soap base grease.
Heavy load series shall range from -25 to
Type code
The operating temperature
100˚C maximum to
prevent deterioration of
HMKʝLL HMK 20 21 LL the seal and filled-up
grease.
Inscribed circle The roller length and rated
Tail code
Open end diameter :П20 load of this bearing type
П8ʙП50 Width ̝M̠2021LL
double-side seal Width : 21 are shorter and smaller
Inscribed circle
diameter LL: Double-side seal than those of the open
Type code type of same dimension.

HMKʝZWD
HMK 38 45 ZW D
Inscribed circle
diameter :П38
Tail code Width : 45
Open end П38ʙП50 Tail code HK3845ZWD ZW : Double-row This type is provided with
double-row type Width cage oil hole on its outer ring.
Inscribed circle D : Outer ring with
diameter oil hole
Type code

B-31