Kennametal 2390961 Screw Machine Drill Bit Solid Carbide

Product Description

The KENNAMETAL 2390961 is a screw machine length solid carbide drill bit designed for high-productivity hole-making in demanding materials. It measures 0.3228 inches (8.20 mm) in diameter with a 140-degree split point and a TiAlN coating that extends tool life in abrasive and high-temperature cutting environments. The overall length is 3.5039 inches (89.00 mm), keeping the short, rigid profile that screw machine length geometry is specified for. Coolant-through capability channels cutting fluid directly to the cutting edge, supporting consistent chip evacuation and thermal control at depth. This bit is installed and operated by machinists, tool-and-die professionals, and production floor technicians.

This drill bit is intended for use in ferrous materials, with primary workpiece materials listed as cast iron and steel. The screw machine length format suits CNC machining centers, turret lathes, and automatic screw machines where a shorter flute-to-shank ratio improves rigidity and reduces runout. The 2-flute regular spiral configuration handles chip flow in through-hole and blind-hole applications. Maximum drilling depth is 35.00 mm. The straight cylindrical shank at 0.3940 inches diameter fits standard drill chucks and collet holders without adapter hardware.

Key Features

• Solid carbide construction for rigidity and wear resistance in steel and cast iron
• TiAlN coating provides thermal and oxidation resistance at elevated cutting speeds
• 140-degree split point reduces thrust force and self-centers without a pilot hole
• Coolant-through design delivers fluid directly to the cutting zone for chip evacuation
• Web-thinned parallel web geometry reduces cutting forces and improves penetration rate
• Conforms to DIN 6537K specification for screw machine length carbide drills

Compatibility

Designed as a replacement or production-run drill for machining operations in cast iron and steel workpieces. Fits any standard drill chuck or collet system accepting a 0.3940-inch straight cylindrical shank. Part of the Kennametal B976A series.

Installation Notes

Installation and operation should be performed by qualified machinists familiar with carbide tooling requirements. Ensure the spindle and chuck or collet are powered down and locked out before loading or changing the bit. Solid carbide tooling is brittle — do not use in hand-held drilling applications or in machines with excessive spindle runout, as lateral shock loads will cause breakage. Verify coolant-through supply pressure and flow are within machine specifications before running at rated feed and speed.