Kennametal 2231579 Screw Machine Drill Bit 7.20mm

Product Description

The KENNAMETAL 2231579 is a screw machine length solid carbide drill bit designed for high-performance drilling in demanding production environments. Built to DIN 6537K standards and coated with TiAlN for extended tool life, this bit features a 140-degree split point geometry with web thinning for reduced thrust force and improved centering accuracy. The 7.20 mm cutting diameter and short overall length of 79.00 mm (3.1102 inches) make it well suited for rigid setups on CNC machining centers, screw machines, and automated drill presses. Material grade KC7315 supports aggressive feed rates in both cast iron and steel workpieces.

This drill bit is intended for use in industrial machining and production environments where tight tolerances and consistent hole quality are required. Its straight cylindrical shank with a diameter of 8.00 mm fits standard drill chucks and collet-style toolholders common in production shops. The right-hand spiral flute configuration and TiAlN coating make it a reliable choice for high-volume operations in ferrous materials including cast iron and steel. It is typically installed and operated by machinists, tooling specialists, and CNC programmers working in job shops or manufacturing facilities.

Key Features

• Solid carbide construction with TiAlN coating for heat and wear resistance in ferrous materials
• 140-degree standard point angle with web thinning reduces entry thrust and improves hole location
• Series B966A Dynapoint High Performance grade, material grade KC7315
• Flute length of 41.00 mm supports drilling depth up to 29.00 mm maximum
• Straight cylindrical shank at 8.00 mm diameter for secure chuck or collet clamping
• Meets DIN 6537K specification for dimensional consistency and interchangeability

Compatibility

Designed as a direct-fit replacement or standard tooling selection for setups requiring a DIN 6537K screw machine length carbide drill in the 6.50 to 8.00 mm diameter range, compatible with straight-shank toolholders and drill chucks sized for an 8.00 mm shank. Primary workpiece materials are cast iron and steel.

Installation Notes

Installation and operation should be performed by qualified machinists familiar with carbide tooling practices. Ensure the machine spindle is fully stopped and the toolholder is properly cleaned before seating the shank. Carbide drills are brittle and susceptible to edge chipping from side loads or interrupted cuts — confirm workpiece fixturing is rigid before starting. Coolant-through is not supported on this bit; apply external coolant or cutting fluid appropriate for the workpiece material if required by the operation.