Kennametal 1869975 DCMT3251LF KT315 Cermet Turning Insert

Product Description

The KENNAMETAL 1869975 is a DCMT3251LF KT315 cermet turning insert designed for precision metal cutting in CNC and manual lathe applications. It carries a multilayer PVD coating of TiN/TiCN/TiN over a cermet substrate, delivering high wear-resistance across steel, stainless steel, and cast iron workpiece materials. The insert features a 55-degree diamond (rhombic) shape with a positive rake angle of 5 degrees, a 7-degree relief angle, and a honed cutting edge style. Two cutting edges are available per insert. The LF chip breaker geometry is optimized for finishing and light machining passes, making this insert a go-to choice for achieving tight tolerances and fine surface finishes in production environments.

This insert is suited for turning, facing, boring, back turning, and back boring operations in both residential shop and production machining environments. Its screw-on holding method provides secure, repeatable seating in compatible toolholders. The KT315 grade is particularly effective when machining steel (P-class), stainless steel (M-class), and cast iron (K-class) at finishing-to-light-roughing parameters. CNC machinists, toolroom operators, and job-shop programmers working with these workpiece material groups will find this insert appropriate for low-to-moderate depth-of-cut passes requiring consistent tool life.

Key Features

• Multilayer PVD coating (TiN/TiCN/TiN) for high wear-resistance on steel, stainless steel, and cast iron
• LF chip breaker geometry optimized for finishing and light machining operations
• 55-degree diamond insert shape with positive rake and positive side clearance for free-cutting action
• Honed cutting edge style reduces micro-chipping and extends tool life at light depths of cut
• Screw-on holding method ensures secure, repeatable insert indexing
• Two usable cutting edges per insert; neutral hand for flexible toolholder compatibility

Compatibility

Designed as a screw-on style DCMT-form turning insert conforming to ANSI insert code DCMT3251 and ISO insert code DCMT11T304, compatible with toolholders designed to accept this standard DCMT screw-on insert geometry. Minimum order quantity is 5 inserts; package quantity is 1.

Installation Notes

Installation should be performed by a qualified machinist or CNC operator with the machine in a full stop, zero-energy state before indexing or replacing inserts. Use the appropriate Torx or hex key driver specified for the toolholder clamping screw to seat the insert without over-torquing the screw. Verify the insert is fully seated against the pocket locating surfaces before resuming operation. Follow the toolholder manufacturer guidelines for seating torque and insert pocket maintenance.