References
■ Dimensional Tolerance and Fittings [Excerpt from JIS B 0401 (1999)] ● Standard Fitting for Holes Reference Hole Shaft Tolerance Class Gap fitting Intermediate fitting Tight fitting
● Standard Fittings for Shafts Reference Shaft Gap fitting
Hole Tolerance Class
Intermediate fitting
Tight fitting
g5 h5 js5 k5 m5 f6 g6 h6 js6 k6 m6 n6* p6*
h5
H6 JS6 K6 M6 N6* P6
H6
F6 G6 H6 JS6 K6 M6 N6 P6* F7 G7 H7 JS7 K7 M7 N7 P7* R7 S7 T7 U7 X7
h6
f6 g6 h6 js6 k6 m6 n6 p6* r6* s6 t6 u6 x6 e7 f7 h7 js7
H7
E7 F7 H7 F8 H8
h7
f7 h7 e8 f8 h8
N
H8
D8 E8 F8 H8 D9 E9 H9
h8
d9 e9 d8 e8
h8 h9
D8 E8
H8 H9
H9
h9
c9 d9 e9
C9 D9 E9
H10 b9 c9 d9 Note: *Exceptions may arise with these fittings depending on the dimension category.
B10C10D10 Note: *Exceptions may arise with these fittings depending on the dimension category.
● Correlation of Tolerance Zones in Standard Hole Fittings
● Correlation of Tolerance Zones in Standard Shaft Fittings
Reference Hole
Reference Shaft
H6
H7
H8
H9
H10
h5
h6
h7 h8
h9
Gap fitting
Gap fitting Intermediate fitting Tight fitting
Fitting
Fitting
Shaft Tolerance Class
Hole Tolerance Class
f6 g5 g6 h5 h6 js5 js6k5 k6 m5m6 n6 p6 e7 f6 f7 g6 h6 h7 js6 js7 k6m6n6 p6 r6 s6 t6 u6 x6 d9 e8 e9 f7 f8 h7 h8 c9 d8 d9g8 e9 h8 h9 b9 c9 d9
M6 JS6 K5 M6 N6 P6 F6 F7 G6 G7 H6 H7 JS6 JS7 K6 K7 M6 M7 N6 N7 P6 P7 R7 S7 T7 U7 X7 E7 F7 F8 H7 H8 D8 D9 E8 E9 F8 H8 H9 B10 C9 C10 D8 D9 D10 E8 E9 H8 H9
50
200
H10
H9
H8
H7
H6
150
0
- 50
100
- 100
50
- 150
0
h5
h6
h6
h7
h8
h9
- 200
- 50
Note: The above table is for reference dimensions greater than 18mm up to 30mm.
Note: The above table is for reference dimensions greater than 18mm up to 30mm.
N76
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