Sandvik Coromant 5755690 Turning Insert VBMT331-UM 1525

Product Description

The SANDVIK COROMANT 5755690 is a solid carbide turning insert in the VBMT style, designed for external turning operations on CNC lathes and turning centers. It carries a dual-layer PVD coating of TiCN and TiN under grade 1525, which provides wear resistance and edge stability when cutting steel and stainless steel. The insert features a 35-degree diamond shape, a neutral hand orientation, a UM chip breaker geometry, and a 1/64-inch corner radius. It seats via screw-lock holding and is part of the CoroTurn 107 series. Machinists and CNC turning technicians install this insert as a precision replacement cutting edge in production and job-shop environments.

This insert is suited for finish to medium turning of steel (ISO P) as the primary workpiece material, with secondary suitability for stainless steel (ISO M) and cast iron (ISO K). The CoroTurn 107 series targets external turning applications where a positive rake geometry and reliable chip control are required. The UM chip breaker geometry is optimized for light to medium depths of cut and moderate feed rates, making this insert a practical choice for fine finishing passes on turned components.

Key Features

• VBMT style, 35-degree diamond insert shape with neutral hand orientation
• Grade 1525 PVD coating: TiCN plus TiN for enhanced wear resistance and edge toughness
• UM chip breaker geometry engineered for light to medium turning on steel and stainless steel
• 1/64-inch (0.0156-inch) corner radius for finish turning applications
• Screw-lock insert holding method compatible with CoroTurn 107 toolholders
• 2 cutting edges per insert; ISO code VBMT 16 04 04-UM 1525

Compatibility

Designed as a screw-lock replacement turning insert for CoroTurn 107 series toolholders accepting VBMT-style inserts with a B clearance code, M tolerance code, and 331 insert size. ISO code VBMT 16 04 04-UM 1525.

Installation Notes

Installation is performed by a qualified CNC machinist or toolroom technician. Power down and lock out the machine spindle before indexing or replacing inserts. Use the correct torx or hex key to seat the clamping screw to the toolholder manufacturers specified torque range — do not overtighten, as this can fracture the carbide insert. Inspect the toolholder pocket and seating surface for chips or debris before installing a fresh cutting edge.