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圆锥和圆锥角系列值(摘自GB/T 157-2001)
| 基本值 | 推算值 | ||||
|---|---|---|---|---|---|
| 系列1 | 系列2 | 圆锥角α | 锥度C | ||
| (°)(′)(″) | (°) | rad | |||
| 120° | — | — | 2.094 395 10 | 1:0.288 675 1 | |
| 90° | — | — | 1.570 796 33 | l: 0.500 000 0 | |
| 75° | — | — | 1.308 996 94 | l:0.651 612 7 | |
| 60° | — | — | 1.047 197 55 | 1:0.866 025 4 | |
| 45° | — | — | 0.785 398 16 | 1:1.207 106 8 | |
| 30° | — | — | 0.523 598 78 | 1:1.866 025 4 | |
| 1:3 | 18°55′28.7199″ | 18.924 644 42° | 0.330 297 35 | — | |
| 1:4 | 14°15′0.1177″ | 14.250 032 70° | 0.248 709 99 | — | |
| 1:5 | 11°25′16.2706″ | 11.421 186 27° | 0.199 337 30 | — | |
| 1:6 | 9°31′38.2202″ | 9.527 283 38° | 0.166 282 46 | — | |
| 1:7 | 8°10′16.4408″ | 8.171 233 56° | 0.142 614 93 | — | |
| 1:8 | 7°9′9.6075″ | 7.152 668 75° | 0.124 837 62 | — | |
| 1:10 | 5°43′29.3176 ″ | 5.724 810 45° | 0.099 916 79 | — | |
| 1:12 | 4°46′18.7970″ | 4.771 888 06° | 0.083 285 16 | — | |
| 1:15 | 3°49′5.8975″ | 3.818 304 87° | 0.066 641 99 | — | |
| 1:20 | 2°51′51.0925″ | 2.864 192 37° | 0.049 989 59 | — | |
| 1:30 | 1°54′34.8570″ | 1.909 682 51° | 0.033 330 25 | — | |
| 1:50 | 1°8′45.1586″ | 1.145 877 40° | 0.019 999 33 | — | |
| 1:100 | 34′22.6309″ | 0.572 953 02° | 0.009 999 92 | — | |
| 1:200 | 17′11.3219″ | 0.286 478 30° | 0.004 999 99 | — | |
| 1:500 | 6′52.5295″ | 0.114 591 52° | 0.002 000 00 | — | |
