Kennametal 4054521 Solid Carbide Jobber Drill Bit 0.2010 in

Product Description

The KENNAMETAL 4054521 is a solid carbide jobber-length drill bit engineered for demanding metal-cutting applications. It carries a wire gauge size of 7, equivalent to 0.2010 inches in diameter, with a 140-degree split-point geometry that reduces thrust and improves center-starting accuracy on hard and abrasive workpiece materials. The multi-layer TiN/TiAlN coating extends tool life in high-temperature cutting environments. With an overall length of 3.2280 inches and a flute length of 1.7320 inches, this bit fits standard drill chucks and CNC toolholders using its 0.0938-inch straight shank. It is part of the Kenna Universal series and is installed by machinists, tool-and-die technicians, and maintenance mechanics.

This drill bit is suited for production and job-shop drilling in steel, stainless steel, cast iron, aluminum and non-ferrous metals, high-temperature alloys, and hardened materials. Its 7xD flute-to-diameter ratio supports a maximum drilling depth of 2.5000 inches. The coolant-through design channels cutting fluid directly to the cutting edge, making it compatible with CNC machining centers and drill presses equipped with through-spindle coolant. It conforms to DIN 6535 and DIN 69090-3 standards, ensuring dimensional interchangeability with other DIN-spec tooling.

Key Features

• Solid carbide submicron-grade substrate for rigidity and wear resistance in hard materials
• Multi-layer TiN/TiAlN coating for extended tool life in high-temp alloy and hardened material applications
• 140-degree point angle reduces entry thrust and improves self-centering on ferrous and non-ferrous workpieces
• Coolant-through construction delivers fluid to the cutting zone for improved chip evacuation and heat control
• Right-hand cut, regular spiral, two-flute geometry for standard drilling operations
• Conforms to DIN 6535 and DIN 69090-3 specifications for dimensional consistency

Compatibility

Designed for use across ISO material groups P (steel), M (stainless steel), K (cast iron), N (aluminum and non-ferrous), and S (high-temperature alloys), as well as hardened materials. Part of the Kenna Universal series platform.

Installation Notes

Installation is performed by machinists or tooling technicians in machine shop or maintenance environments. Ensure the spindle is fully stopped and the machine is locked out before changing tooling. Seat the straight shank fully into the chuck or collet and verify runout before beginning a cut. When using through-spindle coolant, confirm coolant pressure and flow rate are compatible with the machine setup before engaging the tool.