Kennametal 2649382 Screw Machine Drill Bit 9/16 in Carbide

Product Description

The KENNAMETAL 2649382 is a screw machine length drill bit designed for high-performance drilling in demanding industrial and trade applications. Built from solid carbide and coated with a multilayer TiAlN finish, this bit delivers heat resistance and edge retention well beyond standard high-speed steel tooling. At 9/16 inch (0.5625 inches) in diameter, it features a 140-degree point angle for aggressive, accurate entry into hard materials. The straight cylindrical shank measures 0.6299 inches in diameter and 1.8898 inches in length, making it compatible with standard drill chucks and tool holders. Total overall length is 4.5276 inches, with a flute length of 2.5591 inches. Licensed machinists, toolmakers, and maintenance professionals are the typical end users for this bit.

This drill bit is engineered for use in cast iron and steel applications where tool life and hole quality are critical. The screw machine length format provides a compact geometry suited for CNC machining centers, drill presses, and manual screw machines where rigidity and chip control matter. The web-thinned, parallel web configuration reduces thrust force on entry, which is particularly useful when drilling deeper holes or working in tough ferrous materials. Maximum drilling depth is 1.7720 inches.

Key Features

• Solid carbide construction for extended tool life in ferrous materials
• Multilayer TiAlN coating provides thermal barrier and reduces built-up edge
• 140-degree standard point angle improves self-centering and reduces walking
• Web-thinned parallel web lowers entry thrust and improves chip evacuation
• Coolant-through design supports high-speed deep drilling operations
• Conforms to DIN 6537K specification for dimensional consistency

Compatibility

Primary workpiece materials listed by the manufacturer are cast iron and steel. Shank diameter is 0.6299 inches (16.00 mm), compatible with standard straight-shank tool holders and drill chucks sized for that bore. Series B976 designation applies.

Installation Notes

This bit should be installed by qualified machinists or toolroom technicians familiar with carbide tooling. Secure the shank fully in the tool holder to the specified minimum engagement depth before running the spindle. Carbide tooling is brittle compared to HSS — avoid side loading, interrupted cuts without appropriate feed reduction, or using the bit as a reamer. Always verify spindle speed and feed rate against the manufacturer's cutting data for the specific workpiece material before drilling.