Kennametal 1870328 Turning Insert CPMT32505LF KT315 Cermet

Product Description

The KENNAMETAL 1870328 is a CPMT32505LF KT315-grade cermet turning insert designed for finishing and light machining operations on steel, stainless steel, and cast iron. The insert features a multilayer PVD coating of TiN/TiCN/TiN, which delivers high wear resistance across all three primary workpiece material categories. It carries an 80-degree diamond (rhombic) shape with a positive rake angle of 5 degrees and a relief angle of 11 degrees, making it well suited for applications where clean surface finish and tight tolerances are the priority. The corner radius measures 0.0079 inches and the inscribed circle diameter is 0.375 inches. This is a neutral-hand, screw-on style insert with two usable cutting edges per insert.

This insert is appropriate for use in turning, facing, and boring operations on CNC lathes and manual turning centers in both production and job-shop environments. The LF chip breaker geometry is optimized for finishing and light machining passes where controlled chip formation and surface integrity are critical. KT315 grade is classified for steel (P), stainless steel (M), and cast iron (K) applications, each category with high wear-resistance characteristics. Licensed machinists, CNC operators, and toolroom technicians working in metalworking and manufacturing will find this insert applicable across a range of precision-turning scenarios requiring consistent edge performance and dimensional repeatability.

Key Features

• KT315 cermet substrate with multilayer PVD TiN/TiCN/TiN coating for high wear resistance
• 80-degree diamond insert shape with positive rake and positive side clearance for reduced cutting forces
• LF chip breaker optimized for finishing and light machining operations
• Honed cutting edge style for improved edge stability on finish passes
• Two cutting edges per insert; screw-on holding method for secure, repeatable seating
• Compatible with ANSI code CPMT32505 and ISO code CPMT09T302 toolholders
• Maximum depth of cut of 0.0492 inches (1.25 mm)

Compatibility

Designed for use in screw-on CPMT-style toolholders conforming to ANSI insert code CPMT32505 and ISO insert code CPMT09T302. Suitable for turning, facing, and boring of steel, stainless steel, and cast iron workpieces.

Installation Notes

Installation is performed by a qualified machinist or CNC toolsetter. Power down and lock out the machine spindle before indexing or replacing inserts. Use the appropriate torx or hex key to seat the screw-on clamp to the toolholder manufacturer's specified procedure; do not overtighten, as cermet substrates are brittle. Inspect the insert pocket for chips or debris before seating a new insert to ensure proper contact and prevent premature edge failure.