Kennametal 2658398 Taper Length Drill Bit 9/32 in

Product Description

The KENNAMETAL 2658398 is a taper length drill bit engineered for high-performance drilling in demanding metalworking applications. Built from solid carbide and coated with TiAlN for extended tool life and heat resistance, this bit delivers consistent performance in cast iron and steel. It features a 132-degree point angle for accurate self-centering entry, a spiral flute design for efficient chip evacuation, and a web-thinned, tapered web configuration that reduces cutting forces at the tip. With a 4.3307-inch overall length and a 2.8346-inch flute length, it handles taper-length drilling applications where standard jobber bits fall short. Coolant-through capability supports high-speed machining operations.

This drill bit is suited for production and job-shop environments cutting cast iron and steel workpieces. The straight cylindrical shank with a 0.3150-inch diameter seats securely in standard drill chucks and collet holders. The maximum drilling depth of 2.4020 inches makes it appropriate for through-hole and blind-hole work in medium-thickness stock. It conforms to DIN 6537K specification, making it a recognized standard in precision metalworking tooling.

Key Features

• Solid carbide construction for rigidity and wear resistance in ferrous materials
• TiAlN coating extends cutting life and improves performance at elevated temperatures
• 132-degree point angle for precise entry and reduced walking on hard surfaces
• Web-thinned, tapered web reduces thrust force and improves chip flow at the tip
• Coolant-through design supports high-speed, high-feed drilling operations
• Conforms to DIN 6537K specification for dimensional consistency

Compatibility

Designed for use in cast iron and steel applications. Compatible with standard drill chucks and collet toolholders accepting a 0.3150-inch straight cylindrical shank. Part of the KENNAMETAL B978 series.

Installation Notes

Installation and setup should be performed by a qualified machinist or toolroom technician. Secure the straight shank fully in the chuck or collet holder before operation to prevent runout. Ensure the spindle and workpiece are properly fixtured before engaging the cut. When using the coolant-through feature, verify that the machine spindle coolant supply is active and at the correct pressure before beginning the drilling cycle.