Kennametal 1870037 Turning Insert VBMT221LF KT315 Cermet

Product Description

The KENNAMETAL 1870037 is a VBMT221LF KT315 cermet turning insert designed for precision finishing and light machining operations on CNC lathes and turning centers. Coated with a multilayer PVD TiN/TiCN/TiN system, this insert delivers high wear resistance across steel, stainless steel, and cast iron workpieces. The 35-degree diamond (rhombic) shape provides a sharp, positive rake geometry suited to tight-tolerance finishing cuts. With a 1/64-inch corner radius and a maximum depth of cut of 0.0492 inches, the insert is optimized for fine surface finish passes rather than heavy stock removal. Screw-on holding method ensures secure, repeatable seating in compatible toolholders.

This insert is intended for turning, facing, boring, back turning, and back boring applications in production and job-shop environments. The LF chip breaker geometry targets finishing and light machining passes on steel (P), stainless steel (M), and cast iron (K) material groups, where high wear resistance and consistent edge life are critical. The neutral hand orientation makes it suitable for standard right-hand turning setups. Licensed machinists, CNC operators, and toolroom technicians working to ANSI and ISO tooling standards will find this insert compatible with VBMT-style screw-on toolholders across common turning platforms.

Key Features

• Multilayer PVD TiN/TiCN/TiN coating for high wear resistance on steel and stainless steel
• 35-degree diamond insert shape with positive rake and 5-degree relief angle for low cutting forces
• LF chip breaker optimized for finishing and light machining passes
• 1/64-inch corner radius supports tight-tolerance surface finish requirements
• 2 cutting edges per insert; screw-on holding method for secure indexing
• Conforms to ANSI insert code VBMT221 and ISO insert code VBMT110304

Compatibility

Designed for use in VBMT-style screw-on toolholders conforming to ANSI and ISO standards. Suitable for turning, facing, boring, back turning, and back boring operations on steel, stainless steel, and cast iron workpieces.

Installation Notes

Installation should be performed by a qualified machinist or CNC toolroom technician. Power down and lock out the machine before indexing or replacing inserts. Use the correct torque screwdriver for screw-on insert seating to avoid damaging the insert pocket or clamp screw. Inspect the toolholder pocket and seating surfaces for chips or wear before installing a fresh insert.