NSK 691
Extra Small Ball Bearings and Miniature Ball Bearings Metric Series
(BRAND)：NSK
(Availability)：In Stock
Designations
691
Boundary Dimensions
d
1
mm
Bore diameter
D
4
mm
Outside diameter
B
1.6
mm
Width
r (min.)
0.1
mm
Chamfer dimension
Basic Load Ratings
Cr
153
N
Basic dynamic load rating
C0r
36
N
Basic static load rating
Speeds
Grease
100000
min-1
Grease lubrication
Oil (Oil-bath)
120000
min-1
Oil-bath lubrication
da (min.)
1.8
mm
Diameter of shaft abutment
Da (max.)
3.2
mm
Diameter of housing abutment
ra (max.)
0.1
mm
Radius of shaft or housing fillet
Abutment and Fillet Dimensions
z
5
Number of Balls
Dw
0.8
mm
Ball Diameter
