Page 1031 - Tungaloy Catalog

Technical Reference
Milling Tools
Calculating power requirement

Pc : Net power requirement (kW)
kc : Specific cutting force (N/mm 2 )
[Refer to the Table below]
ap : Depth of cut (in)
Because practical power requirements depend on the type of TAC mill ae : Cutting width (in)
(proportional to the true rake angle) and the motor efficiency of the vf : Table feed (in/min)
machine used, the result calculated from the above formula should be
considered as a rough guide.
dValues of specific cutting force (kc)
2
Tensile strength Value of specific cutting force on feed per tooth kc (N/mm )
Work material
MPa .003 (ipt) .005 (ipt) .0003 (ipt) .011 (ipt) .0006 (ipt)
SS400 520 2150 2000 1900 1750 1650
S55C 770 1970 1860 1800 1760 1620
SCM3 730 2450 2350 2200 1980 1710
SKT4 (HB352) 2030 2010 1810 1680 1590
SC450 520 2710 2530 2410 2240 2120
FC250 (HB200) 1660 1450 1320 1150 1030
AR (Si) 200 660 580 522 460 410
Brass 500 1090 960 877 760 680

dValues of cutting force (kc)
1800
Principal force fy
1600 Feed force fx
Back force fz
1400
1200
Cutting force (N) 1000 fz
800
600
400 fx fy
200
0 v f
TGP4100 TGP4200 TGD4400 THF4400 TSP4000 TSE4000 TGN4200 TRD6000
-200
TAC mill
Work material : S50C (210HB) Diameter of TAC mill : ø6.29 in
Cutting Speed : Vc = 5.90 SFM , feed fz = .007 in, Depth of cut a p = .118 in
Cutting by a single edge, dry Technical Reference

dConversion from cutting speed to number of revolutions (unit : min )
-1
Cutter diameter Cutting speed ( vc ) SFM
øDc ( in ) 10 30 50 100 125 150 200 300 500 800 1,000 2,000 4,000
.394 318 955 1,592 3,184 3,980 4,777 6,369 9,554 15,923 25,477 31,847 63,694 127,388
.472 265 796 1,326 2,653 3,317 3,980 5,307 7,961 13,269 21,231 26,539 53,078 106,157
.630 199 597 995 1,990 2,488 2,985 3,980 5,971 9,952 15,923 19,904 39,808 79,617 14
.787 159 477 796 1,592 1,990 2,388 3,184 4,777 7,961 12,738 15,923 31,847 63,694
.984 127 382 636 1,273 1,592 1,910 2,547 3,821 6,369 10,191 12,738 25,477 50,955
1.181 106 318 530 1,061 1,326 1,592 2,123 3,184 5,307 8,492 10,615 21,231 42,462
1.260 99 298 497 995 1,244 1,492 1,990 2,985 4,976 7,961 9,952 19,904 39,808
1.378 90 272 454 909 1,137 1,364 1,819 2,729 4,549 7,279 9,099 18,198 36,396
1.575 79 238 398 796 995 1,194 1,592 2,388 3,980 6,369 7,961 15,923 31,847
1.969 63 191 318 636 796 955 1,273 1,910 3,184 5,095 6,369 12,738 25,477
2.480 50 151 252 505 631 758 1,011 1,516 2,527 4,044 5,055 10,110 20,220
3.150 39 119 199 398 497 597 796 1,194 1,990 3,184 3,980 7,961 15,923
3.937 31 95 159 318 398 477 636 955 1,592 2,547 3,184 6,369 12,738
4.921 25 76 127 254 318 382 509 764 1,273 2,038 2,547 5,095 10,191
6.299 19 59 99 199 248 298 398 597 995 1,592 1,990 3,980 7,961
7.874 15 47 79 159 199 238 318 477 796 1,273 1,592 3,184 6,369
9.843 12 38 63 127 159 191 254 382 636 1,019 1,273 2,547 5,095
12.402 10 30 50 101 126 151 202 303 505 808 1,011 2,022 4,044
Note: In this table, the effects of centrifugal force on the rotating balance of the tool and the toolholder, flying risk of cutter parts, and limited value of toolholder
destruction are not considered. Therefore, when using the tool at high speeds, be sure to observe the specified condition range.
14–13