Kennametal 7081616 Extra Length Drill Bit 2.78mm Carbide

Product Description

The KENNAMETAL 7081616 is a solid carbide extra length drill bit engineered for precision drilling in demanding metalworking applications. Part of the HPR series, this bit features a dual coating of AlCrN and TiAlN for high heat resistance and extended tool life in abrasive and hard materials. The 135-degree drill point angle and chisel point geometry provide accurate entry and reduced thrust force. Internal coolant-through capability delivers cutting fluid directly to the cutting edge, improving chip evacuation and thermal management during deep-hole operations. This is a professional-grade cutting tool intended for use in CNC machining centers and production drilling environments.

This extra length drill bit is suited for deep-hole drilling in ferrous and non-ferrous metals, hardened steels, and cast materials on CNC machining centers, drill presses, and similar equipment. The 20xD flute-to-diameter ratio and 52 mm flute length accommodate drilling depths up to 45 mm. The spiral flute design promotes consistent chip flow out of the bore. It is typically installed and operated by machinists and tooling technicians in production shop environments where tight tolerances and tool longevity are critical.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard-material drilling
• AlCrN and TiAlN dual coating for elevated heat resistance and extended cutting life
• Coolant-through design delivers fluid directly to the cutting zone for improved chip evacuation
• 135-degree chisel point angle for accurate hole entry and reduced thrust
• Spiral flute geometry promotes reliable chip removal at depth
• 20xD flute-to-diameter ratio supports drilling depths up to 45 mm

Compatibility

Designed as an OEM-style replacement or direct-use cutting tool for CNC machining centers and production drilling setups requiring a 3.0 mm shank diameter extra length drill bit with coolant-through capability.

Installation Notes

Installation and tool changes should be performed by qualified machining personnel with the spindle fully stopped and machine controls locked out. Ensure the shank is properly seated and clamped in a compatible toolholder sized for the 3.0 mm shank diameter before initiating any cutting cycle. Verify that the coolant-through supply is active and pressure is appropriate for the machine before drilling. Consult the machine manufacturer guidelines and applicable shop safety standards when setting feed rates and spindle speeds for the workpiece material.