Kennametal 1730321 Indexable Drill Insert Dfrld KC7140

Product Description

The KENNAMETAL 1730321 is a solid carbide indexable drill insert designed for use in indexable drilling operations requiring precise, repeatable cutting performance. Manufactured in the DFRLD style with a KC7140 grade and PVD-applied TiN and TiCN coating, this insert is engineered for durability and wear resistance in demanding machining environments. It features an inscribed circle of 0.193 inches, a thickness of 0.110 inches, and a corner radius of 0.40 mm (0.0157 inches). The insert size designation is 020204 with a length of 0.2803 inches and a width of 0.1929 inches. Installation and replacement are performed by machinists and toolroom technicians working with compatible Kennametal indexable drill bodies.

This insert is suited for drilling applications in materials falling within the C5 and C6 material grade classifications, which generally include cast irons and non-ferrous metals depending on the cutting conditions. The LD chipbreaker geometry promotes controlled chip formation, making it appropriate for through-hole and blind-hole drilling operations on CNC machining centers and dedicated drilling equipment. The 2.3 mm mounting hole diameter accommodates standard indexable insert retention screws used with compatible drill bodies.

Key Features

• KC7140 grade solid carbide substrate with PVD TiN and TiCN multilayer coating for extended tool life
• DFRLD insert style with LD chipbreaker for effective chip control during drilling
• Inscribed circle of 0.193 inches and insert size 020204 for precise dimensional fit in compatible drill bodies
• Corner radius of 0.40 mm (0.0157 inches) for controlled edge geometry at the cutting tip
• C5 and C6 material grade rating covering a broad range of drilling applications
• Mounting hole diameter of 2.3 mm compatible with standard indexable retention hardware

Compatibility

Designed as an OEM-style replacement indexable drill insert for use in compatible Kennametal indexable drill bodies that accept the DFRLD insert style in the 020204 size. Verify insert style, inscribed circle, and hole diameter against the drill body specification before ordering.

Installation Notes

Indexable insert replacement should be performed by a qualified machinist or toolroom technician with the machine powered down and locked out per applicable safety procedures. Use the correct Torx or hex key driver specified by the drill body manufacturer when seating the retention screw — do not overtighten. Inspect the insert pocket for debris or damage before seating a new insert. Confirm proper seating and tool runout before resuming machining operations.