許容ヘルツ応力 |
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●窒化歯車[参考:KHKカタログ] |
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材料[参考] |
歯面硬さ |
σh0(N/mm2) |
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参考 |
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窒化鋼 SACM645など |
Hv650以上 |
一般の場合 |
1176 |
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特に長時間窒化処理した場合 |
1274〜1372 |
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●軟窒化歯車[参考:KHKカタログ] |
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材料 |
窒化時間(h) |
σh0(N/mm2) |
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相対曲率半径(mm) |
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10以下 |
10〜20 |
20以上 |
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構造用炭素鋼および合金鋼 |
2 |
980 |
90 |
80 |
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4 |
1078 |
100 |
90 |
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6 |
1176 |
110 |
100 |
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塩浴軟窒化およびガス軟窒化に適用 |
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相対曲率半径(mm) |
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中心距離a(mm) |
歯数比 |
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1 |
2 |
3 |
4 |
5 |
6 |
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80 |
7.0 |
6.0 |
5.2 |
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100 |
8.8 |
7.5 |
6.3 |
5.4 |
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110 |
9.8 |
8.3 |
7.0 |
6 |
5.2 |
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120 |
10.6 |
9.2 |
7.7 |
6.5 |
5.8 |
5.1 |
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150 |
12.9 |
11.2 |
9.7 |
8.2 |
7.0 |
6.3 |
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200 |
17.0 |
15.0 |
12.6 |
11 |
9.7 |
8.5 |
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300 |
26.0 |
22.2 |
18.9 |
16.5 |
14.4 |
12.6 |
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400 |
35.0 |
30.3 |
24.8 |
22 |
19.0 |
16.7 |
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500 |
44.0 |
38.0 |
32.3 |
29 |
24.5 |
21.5 |
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600 |
52.0 |
46.0 |
39.0 |
34 |
30.0 |
26 |
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700 |
60.0 |
53.0 |
45.0 |
40 |
34.0 |
30.3 |
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800 |
72.0 |
59.0 |
51.0 |
44 |
38.0 |
34 |
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