D 19-85mm
Product Parameter
Without cover
Designation
X-life Mass m
≈kg
Without cover
Designation
X-life Mass m
≈kg
Principal dimensions
mm
Fitting dimansion
mm
Basic load ratings
KN
Fatigue limit load N Limiting Speed
nG
min–1
Recommended Inner ring
Designation
Fw D D1
max
D2
max
C
-0.25
C1
–0.2
C2 dw
E8
r
min
da ra
max
Radial
Dyc/Cr
Radial
Stc/Cor
Axial
Dyc/Cr
Axial
Stc/Cor
Cur Cua
NKX70 XL 500 NKX70-Z XL 520 70 85 95.2 96.5 40 18 11 70 1 90.5 1 50000 92000 43000 127000 15700 6100 2320 IR60X70X25
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Introduction
& nbsp; features these series include radial needle roller bearings and roller bearing components that can bear axial force. they can bear high radial force and axial force in one direction, while nkib bearings can bear axial force in two directions, which can be used as positioning bearing or semi positioning bearing, as shown in Figure 1 .
O: P > O: P > figure 1 & nbsp; dynamic bearing capacity in radial and axial direction

 

 

X-life the combined needle roller bearing is X-life bearing. These bearings have optimized raceway surfaces. so it has higher bearing capacity and longer rated life. the existing design is as follows: ■ needle roller / thrust ball bearing ■ needle roller / thrust cylindrical needle roller bearing needle roller / angular contact ball bearing. needle roller / thrust ball bearing these series are very compact in radial direction without inner ring. However, they require that the raceway of the shaft be hardened and ground. bearings NX and NX.. - Z include thrust ball bearings and housings filled with balls. Nkx and Nkx.. - Z series include axial bearing parts, which are composed of ball and pressed steel plate cages or nylon cages. Nkx.. - Z including thrust bearing parts with cover. lubrication the outer ring has lubricating oil groove and lubricating oil hole for lubricating. NX and Nkx adopt oil lubrication. The cover NX has lubrication holes. NX.. - Z and Nkx.. - Z adopt grease lubrication. the thrust bearing parts adopt lithium-based composite grease ga08 . There are no lubrication holes in the cover. needle roller / thrust cylindrical roller bearing these series have no inner ring, so the radial dimension is very compact. However, they require that the raceway of the shaft be hardened and ground. series nkxr and nkxr.. - Z have axial bearing parts, which are composed of roller and nylon cage components. nkxr.. - Z including thrust bearing parts with cover. lubrication the outer ring has lubricating oil groove and lubricating oil hole for lubricating. nkxr oil lubrication. nkxr.. - Z suitable for grease lubrication. The thrust bearing parts are lubricated with lithium base compound grease ga08 . there is no lubrication hole in the cover. needle roller / angular contact ball bearing combined bearings nkia and nkib have inner rings.