Technical information
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328
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10.10. Formulas and tables
10.10.a. Basic formulas
10.10.c. Ball nose end mills real cutting diameter
ød
0,01 0,02 0,03 0,04 0,05 0,08 0,1 0,15 0,2 0,3 0,5 0,8 1,0 2,0 3,0 4,0 5,0
10,199 0,280 0,341 0,392 0,436 0,543 0,600 0,714 0,800 0,917 1,000 - - - - - -
20,282 0,398 0,486 0,560 0,624 0,784 0,872 1,054 1,200 1,428 1,732 1,960 2,000 - - - -
30,346 0,488 0,597 0,688 0,768 0,967 1,077 1,308 1,497 1,800 2,236 2,653 2,828 2,828 - - -
40,399 0,564 0,690 0,796 0,889 1,120 1,249 1,520 1,744 2,107 2,646 3,200 3,464 4,000 - - -
50,447 0,631 0,772 0,891 0,995 1,255 1,400 1,706 1,960 2,375 3,000 3,666 4,000 4,899 4,899 - -
60,489 0,692 0,846 0,977 1,091 1,376 1,536 1,873 2,154 2,615 3,317 4,079 4,472 5,657 6,000 - -
80,565 0,799 0,978 1,129 1,261 1,592 1,778 2,170 2,498 3,040 3,873 4,800 5,292 6,928 7,746 8,000 -
10 0,632 0,894 1,094 1,262 1,411 1,782 1,990 2,431 2,800 3,412 4,359 5,426 6,000 8,000 9,165 9,798 10,000
12 0,693 0,979 1,198 1,383 1,546 1,953 2,182 2,666 3,072 3,747 4,796 5,987 6,633 8,944 10,392 11,314 11,832
14 0,748 1,058 1,295 1,495 1,670 2,111 2,358 2,883 3,323 4,055 5,196 6,499 7,211 9,798 11,489 12,649 13,416
16 0,800 1,131 1,384 1,598 1,786 2,257 2,522 3,084 3,555 4,341 5,568 6,974 7,746 10,583 12,490 13,856 14,832
18 0,848 1,199 1,468 1,695 1,895 2,395 2,676 3,273 3,774 4,609 5,916 7,419 8,246 11,314 13,416 14,967 16,125
20 0,894 1,264 1,548 1,787 1,997 2,525 2,821 3,451 3,980 4,862 6,245 7,838 8,718 12,000 14,283 16,000 17,321
Depth of cut ap [mm]
Ø d1
=√ap(øø dd 21− ap)
ae / D
Cutting speed
multiplier Vc
1-0,5 0,4 0,3 0,2 0,1 0,05 0,04
1 1,1 1,2 1,3 1,4 2,5
10.10.b. Cutting speed factors depending on the working width ae
- for solid carbide end mills
3
Symbol Unit
m/min
Vc
Vf
fz
n
Cutting speed
Rotational speed
Rate of feed
d [mm] - diameter of milling cutters
1
z - number of teeth
Feed per tooth
1/min
mm/min
mm
Name Formula
zz
zz