It is an ISO 1832 code. S = Shape: Square; N = Clearance angle: 0° (negative insert); M = Tolerance class: Class M; G = Hole and chipbreaker: Cylindrical hole, chipbreaker on both faces.

Which SNMG sizes do you make?

21 sizes, from SNMG120404 to SNMG250924. Grade, coating and chipbreaker are confirmed with each quotation.

How do I read SNMG190608?

SNMG = format; 19 = Cutting edge length code (about 19 mm); 06 = Thickness (6.35 mm); 08 = Corner (0.8 mm nominal).

ISO insert format

SNMG inserts

Square turning insert. We make 21 SNMG sizes, from SNMG120404 to SNMG250924. Grade, coating and chipbreaker are matched to your material and operation.

Ask for a quotation See all sizes

Illustration drawn from the designation, not to scale. Colour depends on the coating.

Reading the code

What SNMG means

The first four letters of an ISO 1832 designation give the shape, the clearance angle, the tolerance class, and the hole and chipbreaker.

Code	Feature	Meaning
S	Shape	Square
N	Clearance angle	0° (negative insert)
M	Tolerance class	Class M
G	Hole and chipbreaker	Cylindrical hole, chipbreaker on both faces

Where SNMG inserts are used

The 90° corner is very strong and a square insert has four corners per face. In holders with a 45° or 75° entering angle it is used for roughing, facing and chamfering.

SNMG is a negative square turning insert. It has a cylindrical hole. It has a chipbreaker on both faces. It can be turned over, so both faces are used: twice the corners of a one-sided insert. Negative inserts have a strong edge and are used from finishing to roughing on rigid machines.

Choose the size for your depth of cut, the corner radius for the feed and finish, and a holder made for SNMG inserts of that size.

SNMG sizes we make

Designation	Inscribed circle	Thickness	Corner
SNMG120404	12.7 mm	4.76 mm	0.4 mm
SNMG120404L	12.7 mm	4.76 mm	0.4 mm
SNMG120404R	12.7 mm	4.76 mm	0.4 mm
SNMG120408	12.7 mm	4.76 mm	0.8 mm
SNMG120408L	12.7 mm	4.76 mm	0.8 mm
SNMG120408R	12.7 mm	4.76 mm	0.8 mm
SNMG120412	12.7 mm	4.76 mm	1.2 mm
SNMG150608	15.875 mm	6.35 mm	0.8 mm
SNMG150612	15.875 mm	6.35 mm	1.2 mm
SNMG150612L	15.875 mm	6.35 mm	1.2 mm
SNMG150612R	15.875 mm	6.35 mm	1.2 mm
SNMG150616	15.875 mm	6.35 mm	1.6 mm
SNMG160408	–	4.76 mm	0.8 mm
SNMG190608	19.05 mm	6.35 mm	0.8 mm
SNMG190612	19.05 mm	6.35 mm	1.2 mm
SNMG190616	19.05 mm	6.35 mm	1.6 mm
SNMG190624	19.05 mm	6.35 mm	2.4 mm
SNMG250716	25.4 mm	7.94 mm	1.6 mm
SNMG250721	25.4 mm	7.94 mm	2.1 mm
SNMG250921	25.4 mm	9.52 mm	2.1 mm
SNMG250924	25.4 mm	9.52 mm	2.4 mm

Dimensions shown are nominal values; a dash means the dimension has not been verified for this insert. Confirm the dimensions against the product drawing. The detailed chipbreaker geometry, grade and coating are not specified by the four-letter format; we confirm them with the quotation. Confirm the fit with the pocket and clamping system of your holder or cutter.

Questions

What does SNMG mean?: It is an ISO 1832 code. S = Shape: Square; N = Clearance angle: 0° (negative insert); M = Tolerance class: Class M; G = Hole and chipbreaker: Cylindrical hole, chipbreaker on both faces.
Which SNMG sizes do you make?: 21 sizes, from SNMG120404 to SNMG250924. Grade, coating and chipbreaker are confirmed with each quotation.
How do I read SNMG190608?: SNMG = format; 19 = Cutting edge length code (about 19 mm); 06 = Thickness (6.35 mm); 08 = Corner (0.8 mm nominal).

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SNMG inserts

Where SNMG inserts are used

SNMG sizes we make

Questions

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Start with the details you already have.