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Ball End Milling Actual Diameter

R D Depth of Cut (Ad)
Radius Dia. 0.01 0.02 0.03 0.04 0.05 0.08 0.1 >>0.15 -
0.1 0.2 0.087 0.12 0.143 0.16 0.173 0.196 0.2
0.2 0.4 0.125 0.174 0.211 0.24 0.265 0.32 0.35
0.3 0.6 0.154 0.215 0.262 0.299 0.332 0.41 0.45
0.4 0.8 0.178 0.25 0.304 0.349 0.387 0.48 0.53
0.5 1 0.199 0.28 0.341 0.392 0.436 0.54 0.6
1 2 0.282 0.398 0.486 0.56 0.624 0.78 0.87
1.5 3 0.346 0.488 0.597 0.688 0.768 0.97 1.08
2 4 0.399 0.564 0.69 0.796 0.889 1.12 1.25
2.5 5 0.447 0.631 0.722 0.891 0.995 1.25 1.4
3 6 0.489 0.692 0.846 0.977 1.091 1.38 1.54
4 8 0.565 0.799 0.978 1.129 1.261 1.59 1.78
5 10 0.632 0.894 1.094 1.262 1.411 1.78 1.99
6 12 0.693 0.979 1.198 1.383 1.546 1.95 2.18
7 14 0.748 1.058 1.295 1.495 1.67 2.11 2.36
8 16 0.8 1.131 1.384 1.598 1.786 2.26 2.52
9 18 0.848 1.199 1.468 1.695 1.895 2.39 2.68
10 20 0.894 1.264 1.548 1.787 1.997 2.52 2.82


R D Depth of Cut (Ad)
Radius Dia. >>-0.1 0.15 0.2 0.3 0.5 0.8 1 2 3
0.1 0.2







0.2 0.4 0.39 0.4





0.3 0.6 0.52 0.57 0.6




0.4 0.8 0.62 0.69 0.77




0.5 1 0.71 0.8 0.92 1



1 2 1.05 1.2 1.43 1.73 1.96 2

1.5 3 1.31 1.5 1.8 2.24 2.65 2.83

2 4 1.52 1.74 2.11 2.65 3.2 3.46 4
2.5 5 1.71 1.96 2.37 3 3.67 4 4.9
3 6 1.87 2.15 2.62 3.32 4.08 4.47 5.66 6
4 8 2.17 2.5 3.04 3.87 4.8 5.29 6.93 7.75
5 10 2.43 2.8 3.41 4.36 5.43 6 8 9.17
6 12 2.67 3.07 3.75 4.8 5.99 6.63 8.94 10.39
7 14 2.88 3.32 4.05 5.2 6.5 7.21 9.8 11.49
8 16 3.08 3.56 4.34 5.57 6.97 7.75 10.58 12.49
9 18 3.27 3.77 4.61 5.92 7.42 8.25 11.31 13.42
10 20 3.45 3.98 4.86 6.24 7.84 8.72 12 14.28


Calculation of Actual Dia.
Calculation of Actual Dia.

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