Page 687 - Tungaloy Catalog

DOFEED 03/06

Standard cutting conditions TXN06 / EXN06 type

Feed per tooth: fz (ipt)
Cutting speed Tool dia.
Work material Hardness Priority Grades Chip- Feed when
breaker Vc (SFM) øDc plunging
fz (ipt)
0.625 ~ 1.25
First choice AH725 MJ 0.020 - 0.060
Carbon steels 1045, 1055 etc. ~ 300HB For low cutting force AH120 ML 330 - 980 0.020 - 0.040 0.004
For impact resistance AH3035 MJ 0.020 - 0.060
First choice AH725 MJ 0.020 - 0.060
Alloy steels 4140, SCr415 etc. ~ 300HB For low cutting force AH120 ML 330 - 660 0.020 - 0.060 0.004
For impact resistance AH3035 MJ 0.020 - 0.060
Prehardened steels 30 ~ 40HRC - AH3035 MJ 330 - 660 0.020 - 0.040 0.004
First choice AH130 ML 0.012 - 0.030
Stainless steels 304, 316 etc. ~ 200HB 330 - 490 0.003
For impact resistance AH130 MJ 0.012 - 0.031
First choice AH120 MJ 0.020 - 0.059
Gray cast irons No35B, No45B etc. 150 ~ 250HB 330 - 980 0.006
For low cutting force AH120 ML 0.020 - 0.039
Ductile cast irons 60-40-18 etc. First choice AH120 MJ 0.020 - 0.059
150 ~ 250HB 260 - 660 0.006
For low cutting force AH120 ML 0.020 - 0.039
Titanium alloy Ti-66AI-4V etc. ~ 40HRC - AH725 ML 100 - 200 0.012 - 0.030 0.004
Heat-resistance alloy Inconel, Hastelloy etc. ~ 40HRC - AH725 MJ 60 - 160 0.004 - 0.012 0.002

Hardened H13 etc. 40 ~ 50HRC AH3035 260 - 430 0.004 - 0.012 0.002
steels D2 etc. 50 ~ 60HRC - AH725 MJ 160 - 230 0.001 - 0.003 0.001
9 When chips stay in the cutting zone during slotting or Tool overhang length must be as short as possible to avoid

pocketing, use an air blast to remove chips from the work chatter. When the tool overhang length is long, decrease
area. the number of revolutions and feed.
TAC Mills Cautionary points for use

Tool geometry on programming
Usage of standard or long shank
When using a long shank, please lower the cutting When programming for CAM, the tool should be
conditions (Vc, fz, ap) to 70% of the maximum conditions considered as a radius cutter. Usually, the corner radius
for the standard shank. should be set as R = 0.118". If a larger radius is used,
overcutting will occur. The following table shows the
amount left uncut (t 1) and overcut (t 2).
0.060 Standard shank
Depth of cut: ap (in) 0.040 Long shank rε 15° max. ap Max. depth of cut t2 overcut
Vc = 330 ~ 980 sfm
Amount left

Vc = 260 ~ 650 sfm
0.020
R
w
t1
Amount left R t1 Corner R when
programming
uncut
Max. depth Corner Amount Amount
0 of cut Corner R left left
0.020 0.040 0.060 0.080 max ap radius W (in) when uncut overcut
Feed per tooth: fz (ipt) (in) rε programming t1 (in) t2 (in)
0.079 0.004 -
Tool dia.: øDc = ø1.250 ~ 1.500" L/D ratio of overhang 0.059 0.079 0.236 0.118 0.030 -
Work material: 1055 (200HB) Standard shank: L/D ≤ 3 0.157 0.021 0.010
Long shank: L/D = 4
Each value in table is calculated theoretically at the maximum condition.

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