Sandvik Coromant 7861065 Turning Insert Coroturn 107

Product Description

The SANDVIK COROMANT 7861065 is a TCMT-style triangular turning insert designed for external and internal turning operations on steel and cast iron workpieces. It carries the manufacturer grade 4425 with a CVD-applied multilayer coating of Al2O3, TiN, and TiCN for extended tool life and heat resistance at the cutting edge. The insert features a 7/32 inch inscribed circle, a 1/32 inch corner radius, a 60-degree included angle, and a neutral hand orientation. The PM chip breaker geometry controls chip flow across a broad range of depths of cut and feed rates. Installed by machinists and CNC turning center operators, this insert is a direct fit for CoroTurn 107 toolholders.

This insert is intended for turning applications on steel (ISO P) as the primary workpiece material and cast iron (ISO K) as the secondary material. The CoroTurn 107 series is commonly used in both roughing and finishing passes on external turning and boring operations in production and job-shop environments. The PM chip breaker is suited to medium-range cutting parameters where reliable chip control and consistent surface finish are required. The ISO code for this insert is TCMT 09 02 08-PM 4425, also referenced as TCMT 1.8(1.5)2-PM in Sandvik catalog notation.

Key Features

• TCMT triangle insert shape with 60-degree included angle and 7-degree relief angle (Clearance Code C)
• CVD multilayer coating: Al2O3, TiN, and TiCN for thermal barrier and wear resistance
• Manufacturer grade 4425 optimized for steel and cast iron cutting
• PM chip breaker geometry for controlled chip formation across medium cutting parameters
• Neutral hand orientation compatible with right-hand and left-hand toolholders where applicable
• Three usable cutting edges per insert

Compatibility

Designed for use in SANDVIK COROMANT CoroTurn 107 series toolholders accepting TCMT-style inserts. ISO code TCMT 09 02 08-PM 4425. Compatible with clamp and screw insert holding methods as specified by Clearance Code C and Tolerance Code M. Suitable for steel (ISO P) and cast iron (ISO K) workpiece materials.

Installation Notes

Installation is performed by machinists or CNC setup technicians. Power down and lock out the machine spindle before indexing or replacing inserts. Use the appropriate torx or hex key specified by the toolholder manufacturer to seat the clamping screw or clamp to the correct torque per the toolholder documentation. Inspect the insert pocket and seating surface for chips or debris before seating the new insert to ensure proper contact and prevent edge chipping on first cut.