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ANSI/ISO Turning Insert Identification

ANSI	ISO	Chart Ref.
T	T	Shape
N	N	Relief Angle
M	M	Tolerance
G	G	Chipbreaker
4	22	I.C.
3	4	Thickness
2	8	Nose Radius
H		ACT Edge Prep

Insert Shape

Symbol	Insert Shape
T	Triangle
Symbol	Square
W	Trigon
R	Round
A, K, M	Parallelogram
C	80º Diamond
D	55º Diamond
V	35º Diamond

 

Relief Angle

Symbol	Relief Angle
N	0º
B	5º
B	7º
P	11º
D	15º
E	20º
F	25º

 

Tolerance

Symbol	Insert I.C.	Thickness
A	± .001	± .001
C	± .001	± .001
E	± .001	± .001
F	± .0005	± .001
G	± .001	± .005
J	± .002	± .001
M	± .002~ + .005	± .005
U	± .002~ + .010	± .005

 

Type

Symbol	Hole	Chipbreaker	Hole Style
A	Yes	None	None
G	Yes	Double	Straight
M	Yes	Dingle	Straight
N	No	None	None
F	No	Double	None
R	No	Single	None
B	Yes	Double	Countersunk
D	Yes	Single	Countersunk
P	Yes	Single	Straight

 

I.C.

Size/Shape	R	S	T	C	D	V	I.C.
(5)			06				5 / 32
(6)			08				3 / 16
–			09				7 / 32
–	06						(.236)
2 (8)		06	11	06	07		1 / 4
0		07		08	09		5 / 16
–	08						(.315)
3	09	09	16	09	11	16	3 / 8
–	10						(.394)
–	12						(.472)
4	12	12	22	12	15		1 / 2
5	15	15	27	16			5 / 8
–	16						(.630)
6	19	19	33	19			3 / 4
–	20						(.787)
–	25						(.984)
8	25	25
0	31						1- 1 / 4
–	32						(1.260)

 

Thickness

ACT Number	ISO Number	Thickness
1.5	02	3 / 32
2	03	1 / 8
3	04	3 / 16
–	05	7 /32
4	06	1 / 4
5	07	5 / 16
5	08	5 / 16
6	09	3 / 8

 

Nose Radius

ACT Number	ISO Number	Radius
–	00	0
0	02	.0079
1	04	.0156
–	05	.0197
2	08	.0312
–	10	.0394
3	12	.0469
–	15	.0591
4	16	.0625
6	24	0.0938
8	32	0.125
–	40	0.1575

 

ACT Edge Prep

Symbol	Edge Preparation
H	Light Hone
HH	Heavy Hone