Originally posted on 2019年11月30日 @ 上午10:43

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R 值 | ||||||||||||
内 圆 角 α | |||||||||||||
<50° | 51°~75° | 76°~105° | 106°~135° | 136°~165° | >165° | ||||||||
钢 | 铁 | 钢 | 铁 | 钢 | 铁 | 钢 | 铁 | 钢 | 铁 | 钢 | 铁 | ||
≤8 | 4 | 4 | 4 | 4 | 6 | 4 | 8 | 6 | 16 | 10 | 20 | 16 | |
9~12 | 4 | 4 | 4 | 4 | 6 | 6 | 10 | 8 | 16 | 12 | 25 | 20 | |
13~16 | 4 | 4 | 6 | 4 | 8 | 6 | 12 | 10 | 20 | 16 | 30 | 25 | |
17~20 | 6 | 4 | 8 | 6 | 10 | 8 | 16 | 12 | 25 | 20 | 40 | 30 | |
21~27 | 6 | 6 | 10 | 8 | 12 | 10 | 20 | 16 | 30 | 25 | 50 | 40 | |
28~35 | 8 | 6 | 12 | 10 | 16 | 12 | 25 | 20 | 40 | 30 | 60 | 50 | |
36~45 | 10 | 8 | 16 | 12 | 20 | 16 | 30 | 25 | 50 | 40 | 80 | 60 | |
46~60 | 12 | 10 | 20 | 16 | 25 | 20 | 35 | 30 | 60 | 50 | 100 | 80 | |
61~80 | 16 | 12 | 25 | 20 | 30 | 25 | 40 | 35 | 80 | 60 | 120 | 100 | |
81~110 | 20 | 16 | 25 | 20 | 35 | 30 | 50 | 40 | 100 | 80 | 160 | 120 | |
111~150 | 20 | 16 | 30 | 25 | 40 | 35 | 60 | 50 | 100 | 80 | 160 | 120 | |
151~200 | 25 | 20 | 40 | 30 | 50 | 40 | 80 | 60 | 120 | 100 | 200 | 160 | |
201~250 | 30 | 25 | 50 | 40 | 60 | 50 | 100 | 80 | 160 | 120 | 250 | 200 | |
251~300 | 40 | 30 | 60 | 50 | 80 | 60 | 120 | 100 | 200 | 160 | 300 | 250 | |
>300 | 50 | 40 | 80 | 60 | 100 | 80 | 160 | 120 | 250 | 200 | 400 | 300 | |
c和h值 | d2/d1 | <0.4 | 0.5~0.65 | 0.66~0.8 | |||||||||
c | ≈0.7(d1-d2) | ≈0.8(d1-d2) | ≈d1-d2 | ||||||||||
h | 钢≈8c | 铁≈9c |