Sandvik Coromant 5756904 Turning Insert Wpmt Trigon

Product Description

The SANDVIK COROMANT 5756904 is a solid carbide turning insert designed for precision external and internal turning operations. It carries a multilayer TiCN, Al2O3, and TiN coating applied over a carbide substrate in grade 2025, which provides wear resistance and thermal stability during continuous and interrupted cuts. The insert measures 4.34 mm in length with a 1/4 inch (6.35 mm) inscribed circle and a 1/64 inch (0.40 mm) corner radius. It features an 80-degree trigon (W) insert shape, a neutral hand orientation, and a screw-holding method. This insert is part of the CoroTurn 111 series and is installed by CNC machinists and turning center operators in production environments.

This insert is optimized for machining stainless steel as its primary workpiece material (ISO material code M). It is suited for use in CoroTurn 111 toolholders that accept WPMT-style inserts with screw clamping. The MM chip breaker geometry supports medium-depth finishing and semi-finishing passes. Maximum depth of cut is 3.94 mm (0.1551 inches). The insert thickness is 3/32 inch (2.38 mm). Typical applications include external profile turning, facing, and contouring on austenitic and duplex stainless steel components in job shop and production turning environments.

Key Features

• Grade 2025 solid carbide with TiCN, Al2O3, and TiN multilayer CVD coating for stainless steel performance
• 80-degree trigon insert shape (W) with 3 cutting edges per insert
• MM chip breaker geometry optimized for medium semi-finish turning of stainless steel
• 1/64 inch (0.40 mm) corner radius for controlled surface finish
• Screw-mount holding method compatible with CoroTurn 111 toolholder system
• Neutral hand orientation for flexible toolholder pairing

Compatibility

Designed for use in CoroTurn 111 series toolholders accepting WPMT-style screw-clamp inserts with ISO code WPMT 04 02 04-MM 2025. Insert size code 21.51 applies.

Installation Notes

Installation is performed by a qualified CNC machinist or turning center setup technician. Before indexing or replacing inserts, ensure the machine is in an E-stop state and the spindle is fully locked. Use the correct Torx or hex key to the toolholder manufacturer's seating specification when tightening the clamping screw — do not overtighten, as carbide inserts are brittle. Inspect the insert pocket and screw for damage or debris before seating a new insert.