Sumitomo 5KHZ251 Carbide Replaceable Tip Drill 23mm ACX80

Product Description

The SUMITOMO 5KHZ251 is a carbide replaceable-tip drill from the SMD series, designed for precision hole-making in demanding machining environments. The drill features a 23mm (0.9055 inch) cutting diameter with a 140-degree included angle and an MEL insert geometry. The tip is manufactured from solid carbide and coated with TiAlCr and TiSi via a PVD coating process, providing wear resistance and thermal stability during high-feed drilling operations. Through-coolant capability is built in, supporting higher cutting speeds and longer tool life in production settings. This drill is typically installed and changed out by machinists and tooling technicians on CNC machining centers.

The 5KHZ251 is suited for machining a range of workpiece materials corresponding to ISO material codes K, M, P, and S, which cover cast irons, stainless steels, carbon and alloy steels, and high-temperature alloys. The replaceable-tip design reduces downtime by allowing tip exchange without removing the drill body from the spindle. This makes it a practical choice for high-volume production shops running automated or semi-automated machining lines where consistent hole quality and fast changeovers are priorities.

Key Features

• Solid carbide replaceable tip for extended tool life and consistent cutting performance
• TiAlCr and TiSi PVD coating for thermal and wear resistance
• 23mm cutting diameter with 140-degree included angle and MEL insert geometry
• Through-coolant design supports chip evacuation and higher cutting speeds
• Compatible with ISO material groups K, M, P, and S workpiece materials
• SMD series body allows fast tip replacement without spindle removal

Compatibility

The 5KHZ251 tip is part of the SUMITOMO SMD series and is designed for use with compatible SMD series drill bodies. Specific body compatibility should be confirmed against SUMITOMO SMD series tooling documentation.

Installation Notes

Replaceable-tip drills of this type are installed and serviced by qualified machinists or toolroom technicians. Ensure the spindle is fully stopped and the machine is in a safe state before changing the drill tip. Proper seating of the tip in the body is critical to accuracy and should be verified before resuming cutting. Consult the machine tool manufacturer and SUMITOMO tooling guidelines for recommended clamping torque and runout tolerances.