Kennametal 6388789 Carbide Replaceable Tip Drill 14.3mm

Product Description

The KENNAMETAL 6388789 is a carbide replaceable tip drill featuring the KTFSS insert style with a KCP15A manufacturer grade and an AlTiN PVD coating. Designed for high-performance drilling operations, this tool accepts a solid carbide tip with HPG insert geometry and a standard point type. The cutting diameter measures 14.30 mm (0.563 inches), with a flute length of 7.00 mm and an overall projection of 0.4035 inches. Two helical flutes with a regular spiral provide chip evacuation during drilling. The insert is secured via clamp-style holding in an R-seat size. This replaceable tip design reduces tooling cost by allowing tip exchange without replacing the full shank body.

This drill is intended for use on steel and cast iron workpieces, corresponding to ISO material codes P and K. It is suited for standard drilling as well as inclined exit drilling and stacked plate drilling applications. The HPG geometry and AlTiN finish support demanding production environments where tool life and surface finish consistency are priorities. It is typically used in CNC machining centers and production turning operations. Installation and tip replacement are performed by machining technicians or toolroom personnel following the manufacturer seating and torque procedures for the clamp-style insert holder.

Key Features

• Solid carbide KTFSS replaceable tip with KCP15A fine grain grade
• AlTiN coating applied via PVD process for heat and wear resistance
• HPG insert geometry optimized for steel and cast iron drilling
• Two helical flutes with regular spiral for reliable chip evacuation
• Clamp-style insert holding in R-seat size for secure tip retention
• Rated for inclined exit and stacked plate drilling applications

Compatibility

Designed as an OEM-style replaceable tip for KTFSS-series drill bodies accepting an R insert seat size. Consult the KENNAMETAL KTFSS tooling system documentation to confirm shank and seat compatibility before ordering.

Installation Notes

Tip replacement should be performed by a qualified machinist or toolroom technician with the spindle fully de-energized and the machine in a locked-out state. Ensure the insert seat is clean and free of chips or debris before seating the carbide tip. Follow the manufacturer clamp torque sequence for the KTFSS seat style. Do not exceed the recommended cutting parameters for the KCP15A grade when programming feeds and speeds.