Sandvik Coromant 5755403 Turning Insert VBGT331-UM 1125

Product Description

The SANDVIK COROMANT 5755403 is a VBGT331-UM solid carbide turning insert from the CoroTurn 107 series, designed for external turning and profiling operations. Featuring a 35-degree diamond shape with a neutral hand orientation, this insert measures 0.638 inches in length with a 3/8-inch inscribed circle and a 1/64-inch corner radius. The dual-layer TiAlN and AlCr2O3 coating is applied via PVD process, providing wear resistance and thermal stability during high-speed finishing cuts. Two cutting edges per insert extend tool life between index cycles. Intended for use by machinists and CNC lathe operators in precision turning applications.

The 5755403 is suited for finishing and semi-finishing passes on steel as its primary workpiece material, with secondary capability on stainless steel, non-ferrous metals, superalloys, and titanium. The UM chip breaker geometry is optimized for light-to-medium depth cuts where chip control and surface finish are critical. Typical applications include shaft turning, bore profiling, and contour work on CNC turning centers and manual lathes. The screw-holding method provides secure clamping in compatible VBGT-style toolholders.

Key Features

• 35-degree diamond insert shape (V) for profiling and contour turning
• TiAlN and AlCr2O3 dual-layer PVD coating for extended wear resistance
• UM chip breaker geometry optimized for finishing on steel and superalloys
• 1/64-inch corner radius for tight-tolerance surface finish requirements
• Neutral hand orientation for flexible toolholder mounting
• Two usable cutting edges per insert

Compatibility

Designed for use in VBGT-style screw-clamp toolholders compatible with the CoroTurn 107 series. ISO code VBGT 16 04 04-UM 1125. Compatible with workpiece materials coded P (steel), M (stainless steel), N (non-ferrous metal), and S (superalloy and titanium) per ISO material classification.

Installation Notes

Installation is performed by a machinist or CNC operator. Power down and zero the spindle before indexing or replacing inserts. Seat the insert fully against the toolholder pocket before tightening the clamping screw; incomplete seating can cause insert fracture or dimensional error. Verify toolholder and insert size codes match before mounting. Inspect the insert pocket for chips or debris that could affect seating.