In this article, we’ll explore essential formulas for trigonometry, cutting speed, feed rates, and more. You’ll gain practical insights to enhance your machining efficiency and accuracy. Get ready to unlock the secrets behind seamless metalworking!
1.tgθ=b/a ctgθ=a/b
2.Sinθ=b/c Cos=a/c
Vc＝(πDS)/1000
F＝SZFz
Scallop＝(ae*ae)/8R
Φ＝√2R2
X. Y＝D/4
Q＝(aeapF)/1000
Fz＝hm * √(D/ap )
Tooling depth = plate thickness – tool height + drill tip (0.3D)
T(min)=L(min)/N(rpm)*f(mm/rev)＝πDL/1000vf
Drill factor table fz
| Dia. mm | Feed knife mm/rev |
| 1.6~3.2 | 0.025~0.075 |
| 3.2~6.4 | 0.05~0.15 |
| 6.4~12.8 | 0.10~0.25 |
| 12.8~25 | 0.175~0.375 |
| >25 | 0.376~0.625 |
1 inch = 25.4 mm.
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