Sandvik Coromant 5755684 Turning Insert VBMT331-UM

Product Description

The SANDVIK COROMANT 5755684 is a solid carbide turning insert in the CoroTurn 107 series, designed for external turning and profiling operations on CNC lathes and turning centers. The insert carries a TiAlN and AlCr2O3 dual-layer coating applied via PVD process, which supports elevated cutting temperatures and edge wear resistance. It features a 35-degree diamond shape (V), a UM chip breaker geometry, and a neutral hand orientation. At 0.638 inches in length with a 3/8-inch inscribed circle, this insert is sized for medium-duty turning passes on steel and a range of secondary workpiece materials. Machining professionals and CNC operators install this insert in compatible screw-clamp toolholders.

This insert is suited for turning steel as its primary workpiece material, with additional capability across stainless steel, non-ferrous metals, superalloys, and titanium. The UM chip breaker geometry is optimized for finishing and light roughing passes where chip control and surface finish consistency are priorities. The insert is used in production and job-shop turning environments on both horizontal and vertical turning centers. ISO code VBMT 16 04 04-UM 1125 allows cross-referencing with toolholder and insert grade catalogs for direct application matching.

Key Features

• TiAlN and AlCr2O3 PVD coating for extended tool life on steel and superalloys
• 35-degree diamond insert shape (V) enables tight profiling and contour turning
• UM chip breaker geometry supports finishing and light roughing with controlled chip flow
• Screw-clamp holding method provides positive insert location and repeatability
• 2 cutting edges per insert; neutral hand for flexible toolholder pairing
• 1/64-inch corner radius (0.0156 inches) suited for detail passes and shoulder blending

Compatibility

Designed for use in screw-clamp VBMT-style toolholders compatible with the CoroTurn 107 series. ISO insert designation VBMT 16 04 04-UM 1125 governs toolholder and adapter selection. Consult the toolholder bore diameter requirement against the 0.1732-inch insert hole diameter for confirmation before installation.

Installation Notes

Installation is performed by qualified CNC machinists or tooling setup personnel. Isolate machine power and confirm spindle stop before changing inserts. Use the correct Torx or hex key to secure the clamping screw to the toolholder manufacturer's specified procedure — do not overtighten or cross-thread the screw. Inspect the insert pocket and seating surface for chips or debris before seating the new insert to ensure proper clamping and runout control.