Sandvik Coromant 5753988 TNMG321-QM 235 Turning Insert

Product Description

The SANDVIK COROMANT 5753988 is a TNMG321-QM 235 grade turning insert from the T-Max P series, designed for external turning operations on CNC lathes and turning centers. The insert is manufactured from solid carbide and carries a CVD-applied TiCN plus TiN coating for wear resistance and extended tool life. It features a 60-degree triangular shape with a neutral hand orientation, providing six usable cutting edges per insert. The QM chip breaker geometry is suited to medium machining conditions. With a 3/8-inch inscribed circle and a 1/64-inch corner radius, this insert fits standard TNMG toolholders used by machinists and CNC turning professionals in production and job-shop environments.

The 5753988 is primarily applied to turning steel workpieces and performs as a secondary grade on stainless steel. It is a solid choice for medium-depth roughing and semi-finishing passes where chip control and coating durability are priorities. The T-Max P series is a widely used platform in production turning, and the QM geometry is specifically designed to manage chip flow in steel and stainless steel applications. Installation requires a compatible TNMG-style toolholder using either a clamp or pin holding method. Typical users are CNC machinists and tool-and-die professionals working in metalworking and manufacturing environments.

Key Features

• CVD-applied TiCN and TiN dual-layer coating for heat and wear resistance
• Six usable cutting edges per insert for extended tooling economy
• QM chip breaker geometry optimized for steel and stainless steel turning
• Neutral hand orientation compatible with standard TNMG toolholder setups
• 1/64-inch corner radius suitable for medium finishing and semi-roughing passes
• Clamp and pin holding method compatibility for secure insert seating

Compatibility

Designed for use in standard TNMG-style toolholders that accept the clamp or pin holding method. ISO designation TNMG 16 03 04-QM 235. Insert size code 321. Compatible with toolholders accepting a 0.1500-inch hole diameter and a 3/8-inch inscribed circle insert.

Installation Notes

Insert replacement should be performed by a qualified machinist with the machine in a powered-down, locked-out state per applicable machine safety procedures. Use the correct torque wrench and clamp hardware specified by the toolholder manufacturer when securing the insert. Inspect the insert pocket and seating surface for debris or wear before seating a new insert. Never force an insert into a pocket that does not accept it freely, as this can cause insert fracture or toolholder damage.