Sandvik Coromant 7861064 Turning Insert Coroturn 107

Product Description

The SANDVIK COROMANT 7861064 is a solid carbide turning insert in the CoroTurn 107 series, designed for external and internal turning operations on CNC lathes and turning centers. Manufactured to ANSI insert code TCMT1.81.51 and ISO code TCMT090204, this triangular insert features a 60-degree included angle, a 7-degree relief angle, and a positive side clearance geometry. The PM chip breaker geometry is optimized for roughing and medium machining applications. A CVD-applied multilayer coating of Al2O3, TiCN, and TiN gives the 4425 grade high wear resistance with moderate toughness, making it well suited for steel and cast iron cutting.

This insert is intended for use in steel (ISO P) as a primary workpiece material and cast iron (ISO K) as a secondary workpiece material. The neutral hand orientation makes it suitable for a range of standard toolholders. Typical applications include roughing and medium finishing passes on shafts, flanges, and general turned components in production and jobshop environments. Installation requires a compatible CoroTurn 107 toolholder that accepts TCMT-style inserts and uses clamp or screw holding methods.

Key Features

• CVD-coated multilayer finish: Al2O3, TiCN, and TiN for high wear resistance on steel and cast iron
• PM chip breaker geometry rated for roughing and medium machining operations
• 4425 grade delivers a balance of wear resistance and toughness in ISO P and K material groups
• Triangular 60-degree insert shape provides 3 usable cutting edges per insert
• Positive side clearance (7-degree relief angle) reduces cutting forces and supports clean chip evacuation
• Neutral hand orientation compatible with standard TCMT-style toolholders using clamp or screw mounting

Compatibility

Designed as an OEM-style replacement or direct-use insert for CoroTurn 107 series toolholders accepting TCMT-style inserts with ANSI size code 1.81.51 and ISO size code 090204.

Installation Notes

Turning inserts are installed and replaced by licensed machinists or qualified CNC operators. Always index the machine spindle to a safe stopped position and de-energize the toolholder before seating or replacing an insert. Use the appropriate torx or hex key to tighten the clamp or screw to the toolholder manufacturer's specified torque; do not overtighten. Inspect the insert seat and shim for debris or damage before seating a new insert.