Sandvik Coromant 7860818 Turning Insert Dcmt 3/8 in Ic

Product Description

The SANDVIK COROMANT 7860818 is a DCMT-style turning insert from the CoroTurn 107 series, designed for external turning operations on CNC lathes and turning centers. Built from solid carbide with a CVD-applied multilayer coating of TiCN, Al2O3, and TiN, this insert delivers wear resistance and thermal stability across a wide range of cutting conditions. It features a 55-degree diamond shape, a 3/8-inch (9.53 mm) inscribed circle, and a 0.40 mm corner radius. The PM chip breaker geometry is engineered for medium turning on steel and cast iron. Licensed HVAC techs, plumbers, and machinists working in production or maintenance environments will recognize this as a standard-format, OEM-grade insert for general turning applications.

The 7860818 is intended for turning steel (ISO material group P) as its primary workpiece material, with cast iron (ISO material group K) as the secondary application. The neutral hand orientation makes it suitable for straight turning passes on most turning center setups. With two cutting edges per insert and a clamp or screw holding method, it fits standard DCMT toolholders used across production and job-shop environments. The CoroTurn 107 series is a well-established platform for external turning, profiling, and light facing operations.

Key Features

• CVD multilayer coating: TiCN, Al2O3, and TiN for wear resistance and heat management
• 55-degree diamond insert shape (DCMT) with 0.40 mm corner radius for versatile profiling
• 3/8-inch inscribed circle with 0.1563-inch insert thickness for rigid, stable seating
• PM chip breaker geometry optimized for medium turning on steel and cast iron
• Two cutting edges per insert for extended tool life per unit
• Compatible with clamp and screw holding methods in standard DCMT toolholders

Compatibility

Designed for use in standard DCMT-style toolholders compatible with the CoroTurn 107 series platform. ISO code DCMT 11 T3 04-PM 4425. Manufacturer catalog reference DCMT 3(2.5)1-PM 4425. Verify toolholder seat size and clamping method before installation.

Installation Notes

Installation is performed by a qualified machinist or toolroom technician. Ensure the machine spindle is fully stopped and the toolholder is secured in the turret before seating or indexing the insert. Use the appropriate torque wrench per the toolholder manufacturer's clamping specification — do not overtighten screw-type clamps, as this can fracture the carbide substrate. Inspect the insert seat and clamp for chips or debris before seating each new edge.