Sandvik Coromant 6270099 Turning Insert TCGW221S0630F 7025

Product Description

The SANDVIK COROMANT 6270099 is a cubic boron nitride (CBN) turning insert used for precision machining of hardened ferrous materials. It carries the full designation TCGW221S0630F 7025 and belongs to the CoroTurn 107 series. The insert features a triangular shape with a 60-degree included angle, a 1/4-inch inscribed circle, and a 1/64-inch (0.0157-inch) corner radius. The cutting edge receives an ER-treated negative land finish. Grade 7025 CBN is uncoated and suited for hard-turning applications where tight tolerances and surface finish are critical. Screw-on holding and a neutral hand orientation make it compatible with a wide range of CoroTurn 107 toolholders. Machinists and CNC operators working on hardened steel, cast iron, and similar H-group materials are the primary users.

This insert is designed for turning operations on hardened workpiece materials classified under ISO material group H, which includes hardened steels and hard cast irons. The CoroTurn 107 series is commonly used in CNC turning centers for finishing and semi-finishing passes where material hardness would degrade conventional carbide tooling. The maximum depth of cut is 1.80 mm (0.0709 inches), making this insert best suited for light, precise finishing cuts rather than heavy stock removal. It fits screw-on insert pockets on compatible CoroTurn 107 toolholders designed for TCGW-style inserts.

Key Features

• Cubic boron nitride (CBN) insert material for hard-turning of ISO H-group materials
• Uncoated Grade 7025 with ER-treated negative land cutting edge for consistent edge integrity
• Triangular insert shape (T) with 60-degree included angle and 7-degree relief angle
• 1/4-inch inscribed circle with 1/64-inch corner radius for tight-tolerance finishing
• Screw-on holding method with neutral hand orientation
• Maximum depth of cut of 1.80 mm (0.0709 inches) suited for finishing passes

Compatibility

Designed for use in SANDVIK COROMANT CoroTurn 107 series toolholders that accept TCGW-style screw-on inserts with a 2.80 mm (0.1102-inch) hole diameter. Compatible with ISO H-group workpiece materials including hardened steels and hard cast irons.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician. Power down and lock out the machine spindle before changing inserts. Use the appropriate Torx or hex key for the insert clamping screw as specified by the toolholder manufacturer. Inspect the insert pocket and seating surface for chips or debris before seating the insert, and confirm correct torque per the toolholder documentation rather than estimated hand-feel.