NSK 687/672
Inch Series Tapered Roller Bearings
(BRAND)：NSK
(Availability)：In Stock
(EMAIL)：info@noksbearings.com
Designations
687/672
Boundary Dimensions
d
101.6
mm
Bore diameter
D
168.275
mm
Outside diameter
T
41.275
mm
Total width
B
41.275
mm
Width of inner ring
C
30.162
mm
Width of outer ring
Cup r (min.)
3.3
mm
Chamfer dimension of outer ring (Cup)
Cone r (min.)
3.5
mm
Chamfer dimension of inner ring (Cone)
Basic Load Ratings
Cr
274000
N
Basic dynamic load rating
C0r
345000
N
Basic static load rating
Speeds
Grease
2000
min-1
Grease lubrication
Oil (Oil-bath)
2800
min-1
Oil-bath lubrication
a
38.3
mm
Effective load center
Dimensions
da
118
mm
Diameter of shaft abutment
Da
149
mm
Diameter of housing abutment
db
112
mm
Diameter of shaft abutment
Db
160
mm
Diameter of housing abutment
ra (max.)
3.5
mm
Radius of shaft or housing fillet of inner ring
ra (max.)
3.3
mm
Radius of shaft or housing fillet of outer ring
