Technical Informations - NBK - #9

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Text version of the page
System of Limits and Fits
Excerpts from JIS B 0401:1998
Table of Common Hole Basic Fits
Basic hole
Shaft tolerance classes
Clearance fit
Transition fit
Interference fit
H 6
P5
h5
js5
k5
m5
f6
h6
js6
k6
m6
n6*
p6*
H 7
f6
ge
h6
js6
k6
m6
n6
p6*
r6*
s6
t6
u6
x6
e7
f7
h7
is7
H 8
f7
h7
e8
f8
h8
d9
e9
H 9
d8
e8
h8
c9
d9
e9
h9
H10
b9
c9
d9
* There may be exceptions in these fits depending on dimension classes.
Interrelation of Tolerance Classes for Hole Basis Fits often Used
Basic shaft
H6
H7
H8
H9
H10
Fits
Clearance
fit
Transition
fit
Interference
fit
Clearance fit
Transition fit
Interference fit
Clearance fit
Clearance fit
Clearance
fit
Shaft tolerance class
f6
95
ge
h5
js5
s6
k5
k6
m5
n6
p6
e7
f6
f7
96
h6
js6
S7
k6
m6
p6
r6
s6
t6
u6
x6
e8
e9
f7
f8
h7
h8
c9
d8
d9
e8
e9
h8
h9
b9
c9
d9
50
;
Q
I
i
ï
a
9
H8
|
x\
3. _
m _eft
1
ï
1
1
y
1
1
1
ï
ï
i
i
1
i
Ï
mension lini
I
3 c 3 c
\
S
1
1
S
1
—150
Ì
1
i
1
—200
1 ï
• The above figure indicates the case where the basic dimension is 30mm.
188

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