Sandvik Coromant 7859190 Turning Insert SNMG433-QM 4415

Product Description

The SANDVIK COROMANT 7859190 is a solid carbide turning insert in the SNMG square format, part of the T-Max P series designed for reliable 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 across a range of cutting conditions. The insert has a 0.5 inch (12.70 mm) inscribed circle, a 0.0469 inch (1.19 mm) corner radius, and a neutral hand orientation. It is suited for machining cast iron (ISO K) and steel (ISO P) workpiece materials and is commonly specified by machinists and CNC operators in job shops and production environments.

This insert is applied in medium to finishing turning operations where consistent edge performance and tool life are priorities. The QM chip breaker geometry is suited for stable chip control across varying depths of cut and feed rates. The 4415 grade is a CVD-coated carbide grade optimized for ISO K and ISO P materials, making this insert a practical choice for shops running mixed-material turning programs on both manual and automated turning equipment.

Key Features

• CVD multilayer coating: TiCN, Al2O3, and TiN for wear resistance and thermal protection
• SNMG square insert shape with 0 degree relief angle (clearance code N, tolerance code M)
• 0.5 inch (12.70 mm) inscribed circle for consistent engagement geometry
• 1.19 mm (0.0469 inch) corner radius for controlled surface finish
• QM chip breaker geometry for effective chip control in medium turning
• Neutral hand orientation — compatible with both left- and right-hand toolholders

Compatibility

Designed as an OEM-style replacement turning insert for SNMG 12 04 12 format toolholders using clamp or screw insert-holding methods, consistent with T-Max P series tooling systems.

Installation Notes

Turning inserts of this type are installed and replaced by machinists or CNC tooling technicians. Power down and lock out the machine before changing inserts. Seat the insert fully and squarely in the pocket before tightening the clamp or screw to the toolholder manufacturer's specified torque. Inspect the insert pocket and clamp for damage or debris before installation to ensure proper seating and runout.