Kennametal 4149611 Taper Length Drill Bit 4.1mm Carbide

Product Description

The KENNAMETAL 4149611 is a solid carbide taper length drill bit engineered for precision drilling in demanding production environments. Built to DIN 6537K specification, it features a 140-degree standard point and a multilayer TiAlN coating that extends tool life in ferrous and hardened materials. The bit runs at 4.1 mm diameter (0.1614 inches) with an overall length of 87 mm (3.43 inches) and a flute length of 49 mm (1.93 inches). Its 8xD flute-to-diameter ratio supports deep-hole applications, and coolant-through capability helps evacuate chips and manage heat at the cutting zone. Material grade KC7325 delivers the toughness needed for interrupted cuts and high-feed drilling cycles.

This drill bit is suited for CNC machining centers and drill presses used in metalworking, mold and die, aerospace component fabrication, and general precision manufacturing. The straight cylindrical shank at 6 mm diameter (0.2362 inches) seats directly in standard collet chucks and hydraulic toolholders. A maximum drilling depth of 41 mm (1.61 inches) and a tapered web configuration make it effective in through-hole and blind-hole operations across steel, cast iron, and similar materials where consistent hole quality and diameter tolerance control are critical.

Key Features

• Solid carbide construction with multilayer TiAlN coating for extended tool life in ferrous materials
• 140-degree standard point geometry reduces thrust force and improves self-centering
• Coolant-through design delivers cutting fluid directly to the tip for heat control and chip evacuation
• 8xD flute length ratio supports deeper hole depth without step drilling
• Tapered web configuration reduces cutting resistance at full depth
• DIN 6537K specification ensures dimensional consistency and toolholder compatibility

Compatibility

Designed for use in CNC machining centers and drill presses equipped with collet chucks or hydraulic toolholders accepting a 6 mm straight cylindrical shank, consistent with DIN 6537K taper length drill bit standards.

Installation Notes

Installation and tool changes should be performed by a qualified machinist or CNC tooling technician with the machine in a powered-off and locked-out state. Verify collet or chuck bore matches the 6 mm shank diameter before seating the bit, and confirm runout with a dial indicator after clamping. Do not exceed the manufacturer-rated maximum drilling depth of 41 mm per pass without confirmed chip clearance.