How do you read a carbide insert box?

A two-digit number designates the sizes of these inserts. The first digit indicates the number of eighths of an inch in the width and the second digit indicates the number of fourths of an inch in the length of the insert.

What is the meaning of Cnmg insert?

General Turning Insert Nomenclature. The above turning insert nomenclature is CNMG 120408. 1 = Turning Insert Shape. 2 = Turning Insert Clearance Angle. 3 = Turning Insert Tolerances.

What is the difference between positive and negative inserts?

Negative inserts, like the VNMG insert in the picture, have a zero relief angle. Both faces of the insert are therefore the same, and you get cutting edges on both. Positive inserts, like the VBMT insert in the picture, have a non-zero relief angle. Only one face of the insert has cutting edges.

What is insert nomenclature?

Inserts are known by an ISO naming convention that describes their shape and size. Each alphabet and number in the name signifies an aspect of the insert’s shape or size. E.g., the first alphabet is the shape, while the last two numbers are the nose radius.

What does Cnmg stand for?


Acronym Definition
CNMG Customer Network Management Gateway
CNMG Conde Nast Media Group
CNMG Caribbean New Media Group (Trinidad)

What is positive and negative insert?

A negative insert has an angle of 90° (0° clearance angle), while a positive insert has an angle of less than 90° (for example, 7° clearance angle). The illustration of the negative style insert, shows how the insert is assembled and tilted in the holder.

Which geometry of the inserts will have highest strength?

The largest possible nose angle should be selected to provide insert strength and reliability. However, this has to be balanced against the variation of cuts that need to be performed. A large nose angle is strong, but requires more machine power and has a higher tendency for vibration.