Kennametal 1161939 DPGT2151HP KC730 Carbide Turning Insert

Product Description

The KENNAMETAL 1161939 is a solid carbide turning insert with a DPGT2151HP geometry and KC730 grade designation. It carries a PVD-applied TiN coating that delivers high wear resistance across a range of workpiece materials including steel, stainless steel, and superalloys. The insert features a 55-degree diamond (rhombic) shape, a positive rake angle of 15 degrees, and an HP chip breaker configured for finishing operations. With a 0.25-inch inscribed circle and a corner radius of 0.0156 inches, this insert is suited for light, precise material removal at shallow depths of cut. Licensed HVAC techs and machinists in precision metalworking environments will recognize this as a standard screw-on style insert for finishing-class turning work.

This insert is designed for finishing operations on steel, stainless steel, cast iron, superalloys, and titanium. Its multi-use geometry supports turning, facing, boring, back turning, and back boring applications. The positive side clearance and honed cutting edge make it appropriate for low-force cutting situations where surface finish and dimensional accuracy are priorities. It is typically used in CNC turning centers and manual lathes equipped with DPGT-style screw-on toolholders. With a maximum depth of cut of 1.25 mm (0.0492 inches), it is best applied in light finishing passes rather than roughing operations.

Key Features

• KC730 grade with PVD TiN coating for high wear resistance on steel, stainless steel, and cast iron
• HP chip breaker geometry optimized for finishing operations
• 55-degree diamond insert shape with positive rake (15 degrees) and positive side clearance
• Honed cutting edge style for reduced cutting forces and improved surface finish
• Multi-use application: turning, facing, boring, back turning, and back boring
• Screw-on holding method with 2 usable cutting edges per insert

Compatibility

Designed for use in DPGT-style screw-on toolholders conforming to ANSI insert code DPGT2151 and ISO insert code DPGT070204. Compatible with tooling systems that accept a 0.25-inch inscribed circle, 55-degree diamond insert with a 3/32-inch thickness and a 0.1102-inch hole diameter. Suitable for machining steel (P), stainless steel (M), cast iron (K), superalloys, and titanium as primary workpiece materials.

Installation Notes

Machining professionals should ensure the toolholder is clean and free of chips or debris before seating the insert. Secure the insert using the appropriate torque specification defined by the toolholder manufacturer for screw-on style inserts. Verify insert orientation and confirm positive clearance geometry matches the intended cutting direction before engaging the workpiece. Inspect the cutting edge condition between passes during finishing operations, as TiN-coated carbide inserts used near their maximum depth of cut will show wear faster under interrupted cuts or scale.