Sandvik Coromant 5755677 Turning Insert VBMT331-MM 1115

Product Description

The SANDVIK COROMANT 5755677 is a solid carbide turning insert in the CoroTurn 107 series, designed for precision external turning operations on difficult-to-machine materials. The insert carries a dual-layer PVD coating of TiAlN and AlCr2O3, which delivers heat resistance and edge stability at elevated cutting temperatures. It features a 35-degree diamond shape (V insert shape code), a neutral hand orientation, and an MM chip breaker geometry optimized for medium machining conditions. With a 3/8-inch inscribed circle and a 1/64-inch corner radius, this insert suits applications where tight tolerances and controlled chip formation are required. Licensed machinists and CNC operators in production and job-shop environments rely on this insert for consistent tool life on challenging workpiece materials.

This insert is intended for turning stainless steel as its primary workpiece material, with secondary applications in superalloys and titanium. It fits CoroTurn 107 toolholders that accept VBMT-style inserts with a screw holding method and a B clearance code with M tolerance. Typical use cases include finish and semi-finish turning passes on ISO material group M (stainless steel) and S (superalloy and titanium) components in aerospace, medical, and industrial manufacturing environments. The 2-cutting-edge configuration and MM chip breaker make this insert well suited for applications demanding predictable chip control and surface quality.

Key Features

• PVD-applied TiAlN plus AlCr2O3 dual coating for thermal resistance and extended edge life
• 35-degree diamond insert shape (V code) for access in tight or profiled cutting conditions
• MM chip breaker geometry optimized for stainless steel and superalloy turning
• 1/64-inch (0.0156-inch) corner radius for controlled surface finish
• Screw-mounted holding method provides secure clamping and repeatable indexing
• 2 cutting edges per insert for cost-effective tooling usage

Compatibility

Designed for use in CoroTurn 107 series toolholders accepting VBMT-style inserts with a B clearance angle, M tolerance class, and screw-lock holding. ISO code VBMT 16 04 04-MM 1115. Compatible with setups targeting ISO workpiece material groups M (stainless steel) and S (superalloy and titanium).

Installation Notes

Installation is performed by CNC machinists or toolroom technicians using the appropriate Torx or hex key for the insert-clamping screw specified by the toolholder manufacturer. Ensure the machine spindle is stopped and all axes are at a safe position before indexing or replacing inserts. Seat the insert fully against the pocket locating surfaces before tightening the clamping screw to avoid micro-movement under cutting loads. Follow the toolholder manufacturer documentation for proper clamping torque and insert pocket inspection intervals.