5-1.Keys and keyways
| unitFmm | ||||||||||
| Nominal size of key bxh |
Keyway dimensions | reference | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| b1And b 2 standard dimensions | Sliding type | Normal form | Tightening type | t1Standard dimensions | t2Standard dimensions | t1And t2Tolerance | Applicable shaft diameter d | |||
| b1 | b2 | b1 | b2 | b1And b2 | ||||||
| tolerance(H9) | tolerance(D10) | tolerance(N9) | tolerance(Js9) | tolerance(P9) | ||||||
| 2x2 | 2 | +0.025 0 |
+0.060 -0.020 |
-0.004 -0.029 |
}0.0125 | -0.006 -0.031 |
1.2 | 1.0 | +0.1 0 |
6`8 |
| 3x3 | 3 | 1.8 | 1.4 | 8`10 | ||||||
| 4x4 | 4 | +0.030 0 |
+0.078 +0.030 |
0 -0.030 |
}0.0150 | -0.012 -0.042 |
2.5 | 1.8 | 10`12 | |
| 5x5 | 5 | 3.0 | 2.3 | 12`17 | ||||||
| 6x6 | 6 | 3.5 | 2.8 | 17`22 | ||||||
| (7x7) | 7 | +0.036 0 |
+0.098 +0.040 |
0 -0.036 |
}0.0180 | -0.015 -0.051 |
4.0 | 3.3 | +0.2 0 |
20`25 |
| 8x7 | 8 | 4.0 | 3.3 | 22`30 | ||||||
| 10x8 | 10 | 5.0 | 3.3 | 30`38 | ||||||
| 12x8 | 12 | +0.043 0 |
+0.120 +0.050 |
0 -0.043 |
}0.0215 | -0.018 -0.061 |
5.0 | 3.3 | 38`44 | |
| 14x9 | 14 | 5.5 | 3.8 | 44`50 | ||||||
| (15x10) | 15 | 5.0 | 5.3 | 50`55 | ||||||
| 16x10 | 16 | 6.0 | 4.3 | 50`58 | ||||||
| 18x11 | 18 | 7.0 | 4.4 | 58`65 | ||||||
| 20x12 | 20 | +0.052 0 |
+0.149 +0.065 |
0 -0.052 |
}0.0260 | -0.022 -0.074 |
7.5 | 4.9 | 65`75 | |
| 22x14 | 22 | 9.0 | 5.4 | 75`85 | ||||||
| (24x16) | 24 | 8.0 | 8.4 | 80`90 | ||||||
| 25x14 | 25 | 9.0 | 5.4 | 85`95 | ||||||
| 28x16 | 28 | 10.0 | 6.4 | 95`110 | ||||||
| 32x18 | 32 | +0.062 0 |
+0.180 +0.080 |
0 -0.062 |
}0.0310 | -0.026 -0.088 |
11.0 | 7.4 | 110`130 | |
|
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| References: "JIS Handbook 7 Machine Elements 2001", edited by the Japanese Standards Association, page 1030, Appendix Table 4, quoted from the shape and dimensions of the keyway for parallel keys. | ||||||||||