N151.2-300-4E Carbide Parting and Grooving Insert

The N151.2-300-4E is a precision carbide parting and grooving insert widely used in CNC and conventional lathes. It is designed for high-performance cutting, delivering excellent stability, efficient chip evacuation, and smooth surface finishes.

The designation 300-4E specifies a 3.00 mm cutting width, making it suitable for medium-duty parting operations. The insert’s optimized geometry provides secure clamping in compatible holders, ensuring minimal vibration and consistent performance during cutting. Its design allows fast chip breaking and reliable operation even at higher feed rates, which increases productivity and tool life.

This insert is ideal for parting and external grooving of steels, stainless steels, and cast irons. It is commonly used in automotive, aerospace, and mold-making industries where precision and repeatability are required. When paired with the correct tool holder, the N151.2-300-4E ensures safe, stable, and efficient machining.

Code Breakdown:

• N151.2 – Parting/grooving insert series (Sandvik standard)

• 300 – Insert cutting width: 3.00 mm

• 4E – Edge design / geometry optimized for parting operations

Key Features:

• Carbide parting and grooving insert

• Cutting width: 3.00 mm

• Optimized edge design (4E geometry)

• Stable clamping for precise machining

• Excellent chip evacuation

• Suitable for steels, stainless steels, and cast irons

• High tool life and reliable performance

Equivalent Inserts:

• Sandvik: N151.2-300-4E 1125 (official series)

Compatible Tool Holders:

• N151.2-300 series holders

• Cut-off tool blocks for 3 mm inserts