Sandvik Coromant 7860820 Turning Insert DCMT32.53-PM

Product Description

The SANDVIK COROMANT 7860820 is a solid carbide turning insert in the DCMT style, designed for precision external turning operations on CNC lathes and turning centers. It carries a CVD-applied multilayer coating of TiCN, Al2O3, and TiN, which provides wear resistance and thermal stability at the cutting edge. The insert features a 55-degree diamond shape, a 3/8 inch (9.53 mm) inscribed circle, a 1.19 mm (0.0469 inch) corner radius, and a PM chip breaker geometry. With 2 cutting edges per insert, it delivers efficient material removal on steel and cast iron workpieces. Licensed machinists and CNC operators install this insert as part of the CoroTurn 107 series tooling system.

This insert is part of the Sandvik Coromant CoroTurn 107 series, which is optimized for external turning of steel as the primary workpiece material (ISO material code P) and cast iron as a secondary workpiece material (ISO material code K). It is suited for both production and maintenance turning applications in industrial and job-shop environments. The neutral hand orientation makes it compatible with standard right-hand and left-hand CoroTurn 107 toolholders designed for DCMT-style inserts. The ISO designation for this insert is DCMT 11 T3 12-PM 4425, and the manufacturer catalog reference is DCMT 3(2.5)3-PM 4425.

Key Features

• CVD multilayer coating: TiCN, Al2O3, and TiN for extended tool life on steel and cast iron
• 55-degree diamond insert shape with 7-degree relief angle for positive clearance
• 1.19 mm corner radius provides a balance between edge strength and surface finish
• PM chip breaker geometry engineered for reliable chip control in steel turning
• 2 cutting edges per insert for cost-effective indexing
• Neutral hand orientation fits standard DCMT-style CoroTurn 107 toolholders

Compatibility

Designed for use with Sandvik Coromant CoroTurn 107 series toolholders accepting DCMT-style inserts. ISO code DCMT 11 T3 12-PM 4425. Clamp and screw insert holding methods are supported. Primary workpiece material is steel (ISO code P); secondary workpiece material is cast iron (ISO code K).

Installation Notes

Insert replacement should be performed with the machine fully powered down and spindle rotation confirmed stopped before indexing or swapping cutting edges. Use the appropriate Torx or hex key as specified by the toolholder manufacturer to seat the clamp or screw securely without overtightening. Verify seating of the insert in the pocket before resuming cuts. Machining professionals should follow applicable shop safety procedures and toolholder manufacturer guidelines for insert clamping.