Sandvik Coromant 7859085 Turning Insert CCMT32.51-UM 4415

Product Description

The SANDVIK COROMANT 7859085 is a CCMT-style turning insert from the CoroTurn 107 series, designed for external and internal turning operations on CNC lathes and turning centers. This solid carbide insert carries a multilayer CVD coating of TiCN, Al2O3, and TiN, manufacturer grade 4415, which delivers wear resistance and thermal stability across a range of cutting conditions. The diamond-shaped insert features an 80-degree included angle, a 9.53 mm inscribed circle, and a 0.4 mm corner radius. The UM chip breaker geometry is engineered for controlled chip formation during medium to finish turning. Installation is performed by qualified machinists and CNC programmers on production and job-shop turning equipment.

This insert is suited for medium to finish turning of steel and cast iron workpieces, corresponding to ISO material groups P (steel) and K (cast iron). The CoroTurn 107 series targets applications requiring close tolerances and consistent surface finish on both external diameters and internal bores. The neutral hand orientation makes this insert compatible with standard right-hand and left-hand toolholders designed for CCMT pocket geometry. Typical applications include shaft turning, facing, and profiling passes in automotive, general engineering, and precision component manufacturing.

Key Features

• CVD multilayer coating: TiCN, Al2O3, and TiN for wear resistance and heat management
• Manufacturer grade 4415 optimized for steel and cast iron cutting
• UM chip breaker geometry for controlled chip formation in medium to finish turning
• 80-degree diamond insert shape (ISO shape code C) provides a strong cutting edge with versatile approach angles
• 2 cutting edges per insert for extended tooling economy
• Clamp and screw holding method compatible with standard CoroTurn 107 toolholders

Compatibility

Designed for use in toolholders with CCMT pocket geometry within the SANDVIK COROMANT CoroTurn 107 series. ISO code CCMT 09 T3 04-UM 4415. Compatible with primary workpiece materials steel (ISO P) and cast iron (ISO K).

Installation Notes

Insert seating and clamping should be performed by a qualified machinist following the toolholder manufacturer torque and clamping sequence recommendations. Power down and lock out the machine spindle before changing inserts. Inspect the insert pocket and clamping components for wear or debris before seating a new insert. Do not exceed the recommended depth of cut or feed rate parameters for grade 4415 in the cutting data tables provided by SANDVIK COROMANT for this series.