Sumitomo 5KHY171 Carbide Replaceable Tip Drill 12mm ACX70

Product Description

The SUMITOMO 5KHY171 is a carbide replaceable tip drill in the SMD Series, designed for precision hole-making in steel workpieces. It features a 12mm cutting diameter and a 140-degree included point angle, providing stable entry and accurate hole geometry. The tip carries a PVD-applied TiAlCr and TiSi combination coating using the ACX70 grade, which is engineered for high-heat resistance and extended tool life in demanding ferrous machining applications. Through-coolant capability allows cutting fluid to be delivered directly to the cutting zone, reducing heat buildup and evacuating chips efficiently. The MTL insert geometry further supports performance in steel-category materials. This tool is installed and used by CNC machinists and toolroom professionals in production and job-shop environments.

The 5KHY171 is suited for drilling operations in steel and other P-category ferrous materials on CNC machining centers and turning centers equipped with through-spindle coolant. The replaceable tip design allows the carbide tip to be swapped out without discarding the drill body, reducing per-hole tooling cost in medium-to-high-volume production runs. It is appropriate for applications where consistent hole diameter, surface finish, and positional accuracy are required across multiple parts.

Key Features

• ACX70 solid carbide tip grade with PVD-applied TiAlCr and TiSi dual coating for heat and wear resistance
• 140-degree included point angle for stable, self-centering entry in steel
• Through-coolant design delivers fluid directly to the cutting edge for chip evacuation and thermal control
• MTL insert geometry optimized for steel and P-category workpiece materials
• Replaceable tip construction extends drill body service life and lowers cost per hole
• SMD Series platform for consistent runout and repeatable tip seating

Compatibility

Designed for use with SMD Series replaceable tip drill bodies accepting the MTL geometry tip in 12mm cutting diameter. Intended for steel and P-category ferrous workpiece materials on through-coolant-capable CNC equipment.

Installation Notes

Installation is performed by a CNC machinist or toolroom technician. The machine spindle must be fully stopped and the tool circuit locked out before seating or removing the replaceable tip. Ensure the tip pocket and clamping surfaces are clean and free of chips before assembly, as contamination affects runout and tip retention. Verify through-coolant pressure and flow at the machine before beginning a cutting cycle.