JetEdge CNMA inserts use a negative, double-sided 80° rhombic format with a flat-top cutting surface. The strong cutting edge is intended for stable continuous and lightly interrupted turning of cast iron.
The flat-top geometry is selected where edge strength and predictable wear are more important than aggressive chip forming.
Product Summary
Item
Description
ISO designation
CNMA
Insert type
Negative, double-sided, flat-top
Shape
80° rhombic
Clearance angle
0°
Primary material
ISO K Cast Iron
Typical operations
Semi-finishing and general turning
Recommended grade direction
JE4025K; JE4015K where applicable
Nominal ISO Dimensions
Insert Size
IC (mm)
Length (mm)
Thickness (mm)
Hole (mm)
Nose Radius (mm)
CNMA120408
12.70
12.90
4.76
5.16
0.8
CNMA120412
12.70
12.90
4.76
5.16
1.2
Selection Direction
Use CNMA for stable cast iron turning where a strong flat-top edge is preferred. Select the nose radius according to component profile, surface-finish requirement, feed rate and setup stability.
Information Required for Selection
Please provide the complete insert designation, cast iron grade, machining allowance, continuous or interrupted condition, toolholder model and required quantity.
Call to Action
Contact JetEdge for selection, samples and quotations.
