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Toolhelix›ISO insert code›CNMG 160608

CNMG 160608

What CNMG 160608 means, letter by letter: rhombic 80°, negative, tolerance M, cylindrical hole, chipbreaker both sides. Inscribed circle 15.875 mm, thickness 6.35 mm, nose radius 0.8 mm.

1 · SHAPERhombic 80°C
2 · CLEARANCE0° · negativeN
3 · TOLERANCEClass Mmedium, pressed
4 · TYPEGCylindrical hole, chipbreaker both sides
5 · SIZE16inscribed Ø 15.875 mm · cutting edge 16.1 mm
6 · THICKNESS6.35 mm06
7 · NOSE RADIUS0.8 mm08
IC 15.875s 6.35clearance 0°rε 0.8
To scale: top view with the inscribed circle (blue dashes) and, on the right, the side view with the thickness. The grey dashes mark the chipbreaker; its real shape is up to the manufacturer.

CNMG 160608 dimensions

Inscribed circle IC15.875 mm
Cutting edge length16.12 mm
Thickness s6.35 mm
Nose radius rε0.8 mm
Corner angle80°
Clearance angle0°
Tolerance MIC ±0.10 · corner height ±0.15 · thickness ±0.13 mm
ANSI equivalent (inch)CNMG 542

What CNMG 160608 tells you on the shop floor

80° corner: strong yet versatile, turns and faces with the same insert.

Double-sided negative insert: edges on both faces, stronger and cheaper per edge. Needs a rigid machine and clamping; not for small bores.

Pressed, medium tolerance: economical, fine for roughing and where you do not need repeatability to a few hundredths of a mm at every insert change.

The most common radius: a balance between strength and finish.

Typical holders for CNMG

For a negative rhombic 80° insert the most common ISO 5608 holders are:

The final R or L means right or left hand. Shank size, length and the exact clamping are in the manufacturer's catalogue.

Toolholders that take it

In inches, with the ANSI designation, the same insert is CNMG 542: size in eighths of an inch, thickness in sixteenths, radius in sixty-fourths. Converting any code, both ways, is in ISO Inserts Pro.

Other CNMG sizes

Designation to ISO 1832; reference tables: Mitsubishi Materials turning catalogue (insert identification). Holders to ISO 5608. Chipbreaker, grade and cutting data differ between manufacturers: the catalogue of the insert you use is what counts.

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Frequently asked questions

What does CNMG 160608 mean?

CNMG 160608: rhombic 80°, negative, tolerance M, cylindrical hole, chipbreaker both sides. Inscribed circle 15.875 mm, thickness 6.35 mm, nose radius 0.8 mm.

What is the inscribed circle of CNMG 160608?

15.875 mm, with a 16.1 mm cutting edge.

What is the ANSI equivalent of CNMG 160608?

CNMG 542.

Which holder takes CNMG 160608?

An ISO 5608 holder for negative rhombic 80° inserts, for example PCLNR/L or PCBNR/L.

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