Kennametal 3640762 Solid Carbide Jobber Drill 6.90 Mm

Product Description

The KENNAMETAL 3640762 is a solid carbide jobber-length drill designed for high-performance hole-making in demanding materials. It measures 6.90 mm in diameter with a 140-degree split point and an overall length of 91 mm (3.5827 inches). The drill carries an AlTiN coating that improves heat resistance and extends tool life in abrasive and high-temperature cutting environments. A web-thinned, tapered-web geometry reduces thrust and improves chip evacuation. Coolant-through capability delivers cutting fluid directly to the cutting edge, making this drill suitable for deep-hole and high-feed applications. Licensed machinists, toolroom operators, and CNC setup technicians are the primary users.

This drill is rated for use in steel, stainless steel, and high-temperature alloys, making it appropriate for aerospace, energy, and general metalworking applications. The 5xD flute-to-diameter ratio and 53 mm flute length support controlled chip flow in these materials. It conforms to DIN 6537K, which governs solid carbide drills with straight shanks for use in precision machining centers and CNC equipment. The straight cylindrical shank measures 8 mm in diameter (5/16 inch), fitting standard ER collet chucks and hydraulic tool holders commonly found in production environments.

Key Features

• Solid carbide construction for rigidity and dimensional stability in hard and abrasive materials
• AlTiN coating provides oxidation resistance and extends tool life at elevated cutting temperatures
• 140-degree point angle reduces thrust and improves self-centering on entry
• Coolant-through design delivers fluid directly to the cutting zone for deep-hole applications
• Web-thinned tapered web lowers cutting forces and improves chip breakage
• Conforms to DIN 6537K for dimensional consistency and toolholder compatibility

Compatibility

Rated for primary workpiece materials including steel, stainless steel, and high-temperature alloys. Fits standard straight-shank toolholders with an 8 mm (5/16 inch) bore, including ER collet systems and hydraulic chucks. Conforms to DIN 6537K specification.

Installation Notes

Installation and use should be performed by qualified machinists or CNC operators familiar with carbide tooling. Ensure the spindle and toolholder are clean and properly torqued before seating the shank to maintain runout within acceptable limits. Confirm coolant-through supply pressure and flow are correctly configured before beginning a drilling cycle. Carbide drills are brittle compared to HSS tooling and should not be used in setups with excessive vibration or interrupted cuts without verifying grade suitability.