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

Which SNMM sizes do you make?

12 sizes, from SNMM120412 to SNMM250932, with inscribed circles from 12.7 to 25.4 mm. Grade, coating and chipbreaker are confirmed with each quotation.

How do I read SNMM190612?

SNMM = format; 19 = Cutting edge length code (about 19 mm); 06 = Thickness (6.35 mm); 12 = Corner (1.2 mm nominal).

ISO insert format

SNMM inserts

Square turning insert. We make 12 SNMM sizes, from SNMM120412 to SNMM250932. 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 SNMM 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
M	Hole and chipbreaker	Cylindrical hole, chipbreaker on one face

Where SNMM 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.

SNMM is a negative square turning insert. It has a cylindrical hole. The chipbreaker is on one face only. It is used one side up. One-sided negative inserts are often used for heavy roughing.

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

SNMM sizes we make

Designation	Inscribed circle	Thickness	Corner
SNMM120412	12.7 mm	4.76 mm	1.2 mm
SNMM150612	15.875 mm	6.35 mm	1.2 mm
SNMM150616	15.875 mm	6.35 mm	1.6 mm
SNMM150624	15.875 mm	6.35 mm	2.4 mm
SNMM190612	19.05 mm	6.35 mm	1.2 mm
SNMM190616	19.05 mm	6.35 mm	1.6 mm
SNMM190624	19.05 mm	6.35 mm	2.4 mm
SNMM190632	19.05 mm	6.35 mm	3.2 mm
SNMM250724	25.4 mm	7.94 mm	2.4 mm
SNMM250732	25.4 mm	7.94 mm	3.2 mm
SNMM250924	25.4 mm	9.52 mm	2.4 mm
SNMM250932	25.4 mm	9.52 mm	3.2 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 SNMM mean?: It is an ISO 1832 code. S = Shape: Square; N = Clearance angle: 0° (negative insert); M = Tolerance class: Class M; M = Hole and chipbreaker: Cylindrical hole, chipbreaker on one face.
Which SNMM sizes do you make?: 12 sizes, from SNMM120412 to SNMM250932, with inscribed circles from 12.7 to 25.4 mm. Grade, coating and chipbreaker are confirmed with each quotation.
How do I read SNMM190612?: SNMM = format; 19 = Cutting edge length code (about 19 mm); 06 = Thickness (6.35 mm); 12 = Corner (1.2 mm nominal).

Application enquiry

Start with the details you already have.

Tell us about the material, feature and current challenge. Your enquiry is saved securely and sent to our team for follow-up.

No account required
Your enquiry is saved for follow-up
Our team receives an email notification

SNMM inserts

Where SNMM inserts are used

SNMM sizes we make

Questions

Related formats

Start with the details you already have.