Sandvik Coromant 5755496 Turning Insert VBMT21.50-UF 1525

Product Description

The SANDVIK COROMANT 5755496 is a solid carbide turning insert in the CoroTurn 107 series, designed for external turning operations on CNC and manual lathes. Identified by ISO code VBMT 11 02 02-UF 1525, this insert features a 35-degree diamond shape (V) with a neutral hand orientation and a 5-degree relief angle. The UF chip breaker geometry is engineered for light to medium cuts on steel and stainless steel. A PVD-applied TiCN plus TiN dual-layer coating provides wear resistance and edge integrity during continuous turning. The insert measures 0.428 inches in length with a 0.25-inch inscribed circle and a 0.20 mm corner radius. Screw-style holding keeps it secure in compatible toolholders. Licensed CNC machinists and turning specialists are the primary installers of this insert.

This insert is suited for finishing and semi-finishing passes on steel as its primary workpiece material, with secondary suitability for stainless steel and cast iron. The UF chip breaker is optimized for close-tolerance turning where chip control and surface finish are critical. The CoroTurn 107 series is a common platform in production turning cells and job-shop environments handling precision components. The 35-degree included angle allows access to tight shoulders and contoured profiles that wider inserts cannot reach. Applications include shaft turning, facing, and light profiling on ferrous materials.

Key Features

• 35-degree diamond insert shape (V) with 5-degree relief angle for shoulder access and precision profiling
• UF chip breaker geometry optimized for finishing and semi-finishing cuts on steel
• PVD-coated TiCN plus TiN dual layer for enhanced wear resistance and edge life
• Neutral hand orientation compatible with right- and left-hand toolholder setups
• Screw-type insert holding for positive, repeatable seating in compatible holders
• Two cutting edges per insert for extended tool life between change-outs

Compatibility

Designed for use with CoroTurn 107 series toolholders accepting VBMT-style inserts with a 0.25-inch inscribed circle. Confirm toolholder bore and seat geometry before installation. Specific toolholder compatibility was not provided in the available product data.

Installation Notes

Insert replacement should be performed with the machine fully powered down and spindle locked. Use the manufacturer-specified torx or hex key to tighten the clamping screw to the toolholder seat — do not overtighten, as this can fracture the carbide insert. Inspect the toolholder seat and shim for chips or debris before seating a new insert. Proper insert orientation relative to the programmed tool nose radius compensation value is critical for achieving correct part geometry on CNC turning centers.