Kennametal 2658406 Taper Length Drill Bit 13/32 in

Product Description

The KENNAMETAL 2658406 is a taper length solid carbide drill bit from the B978 series, designed for high-performance drilling in cast iron and steel. It features a 132-degree point angle, TiAlN coating for heat and wear resistance, and a web-thinned, tapered web configuration that reduces thrust and improves chip evacuation. The straight cylindrical shank measures 0.4724 inches in diameter and is compatible with standard drill chucks and collet holders. Coolant-through capability supports high-feed applications where chip control and tool life are critical. This bit is sized at 13/32 inches (0.4062 inches decimal) and conforms to DIN 6537K.

This drill bit is suited for production and maintenance machining environments where ferrous materials such as cast iron and steel are the primary workpiece. The spiral flute geometry with right-hand cut makes it appropriate for use in CNC machining centers, drill presses, and production lathes. The taper length format provides additional reach compared to jobber-length bits while maintaining rigidity. It is installed and used by machinists, tool-and-die professionals, and production drilling operations requiring tight tolerance and consistent hole quality.

Key Features

• Solid carbide construction with TiAlN coating for extended tool life in ferrous materials
• 132-degree point angle with web-thinned, tapered web for reduced entry thrust
• Coolant-through design supports high-speed, high-feed drilling cycles
• Spiral flute, right-hand cut geometry for efficient chip evacuation
• Straight cylindrical shank at 0.4724 inches for broad holder compatibility
• Conforms to DIN 6537K specification for consistent dimensional standards

Compatibility

Designed for drilling cast iron and steel. Straight cylindrical shank accepts standard drill chucks and collet systems sized for 0.4724-inch shank diameter. Conforms to DIN 6537K.

Installation Notes

Installation and use should be performed by qualified machinists familiar with carbide tooling requirements. Ensure the machine spindle and chuck are powered down and locked out before mounting or removing the bit. Carbide tooling is brittle — avoid side loading, interrupted cuts without proper feed adjustment, or dropping the bit on hard surfaces. Verify coolant-through supply lines are connected and functioning before initiating high-feed cycles.