Sandvik Coromant 7859290 Turning Insert Solid Carbide

Product Description

The SANDVIK COROMANT 7859290 is a solid carbide turning insert designed for metal cutting operations on steel workpieces. It carries the ISO designation 3-80-101104-8-L4 4415 and features a multilayer CVD coating system consisting of TiCN, Al2O3, and TiN for extended wear resistance and thermal protection at the cutting edge. The insert is neutral hand, making it suitable for use in both left- and right-hand toolholders. A corner radius of 0.0156 inches contributes to surface finish control and edge stability during turning passes. Grade 4415 is a coated carbide grade suited to continuous and light interrupted steel cutting applications. The L4 chip breaker geometry assists with chip control across a range of depths of cut and feed rates.

This insert is intended for lathe and turning center applications where steel is the primary workpiece material. The secondary workpiece material code K indicates suitability for cast iron as well. The 3-80-L4 series is commonly used in external and facing operations on CNC turning equipment. It is installed and serviced by machinists and CNC lathe operators in production and job shop environments. The clamp and screw holding method accommodates standard toolholders designed for this insert style. This insert ships individually but carries a minimum order quantity of 2 units.

Key Features

• Multilayer CVD coating: TiCN plus Al2O3 plus TiN for heat and wear resistance
• Grade 4415 coated carbide optimized for steel turning
• Neutral hand geometry compatible with left- and right-hand holders
• L4 chip breaker for effective chip control during steel cutting
• 0.0156-inch corner radius for surface finish and edge stability
• Compatible with clamp and screw holding methods

Compatibility

Designed as an OEM-style replacement turning insert for toolholders and turning centers accepting 3-80 series inserts with clamp or screw holding in the 3-80-L4 series.

Installation Notes

Turning insert replacement should be performed by a qualified machinist or CNC operator with the machine spindle stopped and all axes at a safe position. Use the appropriate torque wrench and insert key for the clamp or clamping screw to avoid over-tightening and seat damage. Inspect the insert pocket and shim for wear or debris before seating the new insert. Follow shop safety procedures and machine manufacturer guidelines when handling carbide inserts, as edges are extremely sharp.