Kennametal 6388645 Carbide Replaceable Tip Drill 25/32 in

Product Description

The KENNAMETAL 6388645 is a solid carbide replaceable tip drill designed for high-productivity hole-making in steel and cast iron. The tip carries the ISO designation KTFSS07813HPG and is manufactured in grade KCP15A using fine-grain carbide. It ships with an AlTiN coating applied via PVD process, which supports elevated cutting temperatures common in aggressive feed-rate drilling. The cutting diameter is 0.7813 inches (25/32 inches), the functional length is 0.3907 inches, and the overall projection is 0.5564 inches. The 2-flute, regular helical spiral geometry and HPG insert geometry are optimized for chip evacuation in ferrous materials. Installation uses a clamp-style insert holding method without coolant-through capability.

This replaceable tip drill is suited for precision drilling operations in ferrous materials including steel and cast iron in production machining environments. The KTFSS series tip is designed for applications that include standard through-drilling, inclined exit surfaces, and stacked plate configurations. It is appropriate for CNC machining centers where consistent hole quality and rapid tip replacement between runs are required. The 2-flute, 2-margin geometry supports dimensional accuracy in close-tolerance bore applications across light manufacturing and heavy industrial shops.

Key Features

• Solid carbide KCP15A fine-grain grade tip for long tool life in ferrous materials
• AlTiN coating via PVD process for heat resistance at elevated cutting speeds
• HPG insert geometry with 2-flute, 2-margin, no-coolant-through configuration
• Clamp-style tip retention for repeatable positioning and fast changeover
• Rated for inclined exit, stacked plate, and standard drilling applications
• KTFSS series ISO-standardized tip for broad toolholder compatibility

Compatibility

Designed as a replaceable tip for KTFSS series drill bodies accepting an X-seat insert size. Compatible workpiece materials are steel (ISO P) and cast iron (ISO K) as specified by the manufacturer.

Installation Notes

Installation and tip replacement should be performed by a qualified machinist or toolroom technician. Ensure the machine spindle is fully stopped and the tool is secured in a tool holder before seating or removing the carbide tip. Use the correct clamp torque driver as specified by the toolholder manufacturer - do not over-torque the clamp screw. Verify tip seating and runout before returning the assembly to service.