Kennametal 3640720 Screw Machine Drill Bit 12mm Carbide

Product Description

The KENNAMETAL 3640720 is a solid carbide screw machine length drill bit engineered for high-performance drilling in demanding materials. It features a 12.00 mm diameter, a 140-degree split point, and a TiAlN coating that extends tool life in high-heat applications. The overall length is 102.00 mm with a 55.00 mm flute length and a maximum drilling depth of 40.00 mm. Coolant-through construction supports internal coolant delivery to the cutting zone. This bit is designed for use by machinists and toolroom technicians working on CNC machining centers and drill presses in production environments.

This drill bit is suited for high-temperature alloy and stainless steel workpieces where tool wear and heat generation are primary concerns. The 3xD flute-to-diameter ratio and web-thinned parallel web configuration reduce thrust force and improve chip evacuation. It is a practical choice for aerospace, defense, medical, and industrial manufacturing applications where consistent hole quality and dimensional accuracy are required across high-cycle production runs.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard and abrasive materials
• TiAlN coating improves heat resistance and extends tool life in high-temperature alloys and stainless steel
• 140-degree point angle reduces thrust and improves centering on entry
• Coolant-through design delivers coolant directly to the cutting edge for thermal management and chip flushing
• Web-thinned parallel web reduces cutting forces and supports efficient chip flow
• Straight cylindrical shank compatible with standard drill chucks and collet holders
• Conforms to DIN 6537K specification for consistent geometry and interchangeability

Compatibility

Designed as an OEM-style replacement and production tooling option for machining centers and drill presses using standard straight-shank toolholders in the 12.00 mm diameter range. Primary workpiece materials are high-temperature alloys and stainless steel per Series B291-YPL application guidelines.

Installation Notes

Installation and tool changes should be performed by a qualified machinist with the machine fully powered down and locked out per applicable OSHA lockout/tagout procedures. Ensure the shank seating in the collet or chuck is clean and free of chips before clamping. Verify coolant-through passages are clear and coolant pressure is set per the machining center's tooling specifications before initiating a cut. Do not exceed the maximum drilling depth of 40.00 mm in a single pass without confirming chip evacuation.