Sandvik Coromant 5755670 Turning Insert VBMT331-MM

Product Description

The SANDVIK COROMANT 5755670 is a solid carbide turning insert in the VBMT331-MM 1105 designation, part of the CoroTurn 107 series. Designed for external turning operations, this insert features a 35-degree diamond shape (V-style) with a PVD-applied TiAlN coating that supports high cutting temperatures and extended tool life. The insert is neutral-handed, measures 0.638 inches in length with a 3/8-inch inscribed circle, and carries a 1/64-inch corner radius. It is held in place via screw clamping and is intended for use by machinists and CNC lathe operators in production and job-shop environments.

The 5755670 is suited for turning steel as its primary workpiece material, and is also rated for stainless steel, superalloys, and titanium as secondary materials. The MM chip breaker geometry is optimized for medium machining conditions where controlled chip formation is critical. This insert fits into standard VBMT-style toolholders and is commonly used in both roughing and finishing passes on ferrous and difficult-to-machine alloys. The CoroTurn 107 series is designed for light to medium turning with a positive cutting geometry that reduces cutting forces.

Key Features

• TiAlN coating applied via PVD process for heat resistance and extended wear life
• 35-degree diamond insert shape (VBMT) provides access to tight workpiece profiles
• MM chip breaker geometry for controlled chip evacuation in medium turning
• Neutral insert hand — compatible with both right- and left-hand toolholder setups
• Screw-clamping insert holding method for secure, repeatable seating
• Two cutting edges per insert

Compatibility

Designed as an OEM-style replacement insert for VBMT-style toolholders in the CoroTurn 107 series. Compatible with external turning applications on steel, stainless steel, superalloys, and titanium workpiece materials. ISO code VBMT 16 04 04-MM 1105.

Installation Notes

Installation should be performed by a qualified machinist or CNC tooling technician. Power down and lock out the machine spindle before indexing or replacing inserts. Use the appropriate Torx or hex key to secure the clamping screw to the toolholder specification — do not overtighten, as this can crack the carbide insert. Inspect the insert seat and clamp for chips or debris before seating a new insert.