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Designation System for TAC Milling Inserts<br />
Symbol Hole Hole shape Chip groove Section shape<br />
N<br />
R Without -<br />
Without<br />
On one side<br />
F<br />
On both sides<br />
W<br />
T<br />
Partially cylindrical Without<br />
hole with 40˚ ~ 60˚<br />
mouth on one side On one side<br />
Partially cylindrical<br />
Q<br />
Without<br />
hole with 40˚ ~ 60˚<br />
mouth on both<br />
U With sides On both sides<br />
B<br />
H<br />
Partially cylindrical Without<br />
hole with 70˚ ~ 90˚<br />
mouth on one side On one side<br />
Partially cylindrical<br />
C<br />
Without<br />
hole with 70˚ ~ 90˚<br />
mouth on both<br />
J<br />
sides On both sides<br />
X - - -<br />
4 Insert type<br />
Symbol Cutting edge length (R)<br />
S<br />
R<br />
T<br />
R<br />
R<br />
R<br />
H<br />
R<br />
A<br />
R<br />
5 Cutting edge length<br />
*The thickness is different<br />
according to the product<br />
symbol.<br />
Symbol<br />
Thickness<br />
02 2.38<br />
03 3.18<br />
T3 3.97<br />
04 4.76<br />
05 5.56<br />
06 6.35<br />
07 7.94<br />
09 9.52<br />
Thickness<br />
6 Thickness (mm)<br />
9<br />
TAC Mills<br />
Example<br />
Example<br />
Metric system<br />
Inch system<br />
1<br />
S<br />
1S<br />
2<br />
E<br />
2D<br />
3<br />
E<br />
3K<br />
N4<br />
4N<br />
5<br />
12<br />
4<br />
5<br />
1 Shape<br />
2 Relief angle<br />
Symbol Shape<br />
Included Outlined<br />
Relief angle<br />
angle (degree) figure Symbol (degree)<br />
H Hexagonal 120°<br />
C 7°<br />
S Square 90°<br />
D 15°<br />
T Triangular 60°<br />
E 20°<br />
C 80°<br />
F 25°<br />
E Rhombic 75°<br />
G 30°<br />
G 70°<br />
M Others<br />
L Rectangular 90°<br />
N 0°<br />
A Parallelogram 85°<br />
P 11°<br />
R<br />
W<br />
Round<br />
Trigon 80°<br />
Q<br />
O<br />
Others<br />
Others<br />
W Special (wiper) —<br />
X Others<br />
O Octagonal 135°<br />
S Others<br />
P Pentagonal 108°<br />
W Double relief<br />
X<br />
Y<br />
Z<br />
Special<br />
Special<br />
Special<br />
Others angle<br />
Others angle<br />
Others angle<br />
3 Tolerance class (mm)<br />
Symbol<br />
A<br />
C<br />
E<br />
G<br />
H<br />
K<br />
M<br />
N<br />
Inscribed<br />
circle dia.<br />
6.35<br />
9.525<br />
12.7<br />
15.875<br />
19.05<br />
25.4<br />
Tolerance on<br />
corner height<br />
± 0.005<br />
± 0.013<br />
± 0.025<br />
± 0.025<br />
± 0.013<br />
± 0.013<br />
± 0.08 ~ ± 0.18<br />
± 0.08 ~ ± 0.18<br />
± 0.05<br />
± 0.08<br />
± 0.1<br />
± 0.13<br />
Tolerance on<br />
thickness<br />
± 0.025<br />
± 0.025<br />
± 0.025<br />
± 0.13<br />
± 0.025<br />
± 0.025<br />
± 0.13<br />
± 0.025<br />
± 0.08<br />
± 0.13<br />
± 0.18<br />
± 0.25<br />
± 0.08<br />
± 0.13<br />
± 0.15<br />
± 0.18<br />
Tolerance on<br />
inscribed circle<br />
± 0.025<br />
± 0.025<br />
± 0.025<br />
± 0.025<br />
± 0.013<br />
± 0.05 ~ ± 0.13<br />
± 0.05 ~ ± 0.13<br />
± 0.05 ~ ± 0.13<br />
Tolerance on inscribed circle Tolerance on corner height<br />
(ød)<br />
(mm)<br />
J, K, L, M, N<br />
(class)<br />
U (class) M, N (class) U (class)<br />
± 0.13<br />
± 0.2<br />
± 0.27<br />
± 0.38<br />
9–4
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