Kennametal 2658399 Taper Length Drill Bit 19/64in

Product Description

The KENNAMETAL 2658399 is a solid carbide taper length drill bit from the B978 series, designed for high-performance drilling in demanding industrial and machining applications. Built to DIN 6537K specification, this bit features a TiAlN coating for heat and wear resistance, a 132-degree standard point, and a web-thinned, tapered web configuration that improves chip evacuation and reduces thrust at entry. At 0.2969 inches in diameter with a 4.3307-inch overall length and a 2.8346-inch flute length, this bit suits precision work where taper length reach is required. Coolant-through capability supports high-cycle cutting operations. Machinists and tool-and-die professionals are the primary installers.

The 2658399 is rated for use in cast iron and steel applications. Its straight cylindrical shank measures 0.3150 inches in diameter and 1.4173 inches in length, providing secure chuck engagement. The regular spiral flute geometry with right-hand cut makes this suitable for CNC machining centers and manual drill press operations where consistent hole quality in ferrous materials is required. Maximum drilling depth is 2.4020 inches, keeping the bit within its designed flute length for proper chip clearing.

Key Features

• Solid carbide construction for rigidity and wear resistance in ferrous materials
• TiAlN coating extends tool life under high heat and high-speed cutting conditions
• 132-degree standard point angle with web thinning reduces entry thrust and improves centering
• Coolant-through design supports high-cycle and deep-hole drilling operations
• DIN 6537K specification ensures dimensional consistency
• Right-hand spiral flute with tapered web configuration for efficient chip evacuation

Compatibility

Designed for use in cast iron and steel machining applications. Fits standard straight-shank tool holders and drill chucks accepting a 0.3150-inch shank diameter.

Installation Notes

Installation and tool changes should be performed with the machine fully powered down and locked out per applicable safety procedures. Ensure the chuck or collet is properly sized for the 0.3150-inch straight cylindrical shank before securing. Coolant-through operation requires a compatible spindle and toolholder with internal coolant delivery. Verify drilling depth does not exceed the rated maximum of 2.4020 inches to maintain proper chip clearance and avoid tool overload.