NSK water pump bearing accuracy

Both NSK ball ball type and ball roller type of water pump bearings have the same dimensional tolerances as outlined below.

NSK water pump bearing accuracy

Types of bearings Tolerance of outside diameter of out ring
D
Tolerance of width of outer ring
W
Tolerance of diameter of main shaft
A
Tolerance of diameter of front shaft
A1
Tolerance of diameter of rear shaft
B
Tolerance of shaft length
L1
Tolerance of front shaft length
L4
Tolerance of rear shaft length
L3
Tolerance of assembled width
L2
High Low High Low High Low High Low High Low High Low High Low High Low High Low
RWF All dimensions 0 -13 +150 -150 0 -13 0 -13 0 -13 +250 -250 +250 -250 +250 -250 +150 -150
BWF

Standard chamfer designs and dimensions of NSK water pump bearings are as follows:

Shaft chamfer
NSK water pump bearing Shaft chamfer

Outer ring chamfer
NSK water pump bearing Outer ring chamfer

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