Kennametal 3640677 Screw Machine Drill Bit 3mm Carbide

Product Description

The KENNAMETAL 3640677 is a screw machine length drill bit engineered for high-performance drilling in demanding materials. Built from solid carbide and coated with TiAlN, this bit is designed to handle high temperature alloys and stainless steel where standard HSS tooling fails. It measures 3.00 mm in diameter with a 140-degree point angle and an overall length of 62.00 mm. The web-thinned, parallel web construction reduces thrust and improves chip evacuation. Coolant-through capability makes it suited for wet machining applications where heat management is critical. Licensed machinists and CNC tool setters are the primary users of this tooling.

This drill bit is intended for use in screw machine and CNC drilling operations targeting high temperature alloys and stainless steel. The 3xD flute-by-diameter ratio and 20.00 mm flute length support controlled chip flow in short-hole applications. The straight cylindrical shank at 6.00 mm diameter seats securely in standard drill chucks and collet holders. It conforms to DIN 6537K specification, making it a fit for shops operating to metric DIN tooling standards. Series B291-YPL identifies this as a dedicated high-performance variant within the KENNAMETAL lineup.

Key Features

• Solid carbide construction provides rigidity and wear resistance in abrasive workpiece materials
• TiAlN coating extends tool life and supports elevated cutting temperatures in stainless steel and high temperature alloys
• 140-degree point angle reduces thrust and improves self-centering on entry
• Web-thinned parallel web lowers cutting forces and aids chip breakage
• Coolant-through design delivers cutting fluid directly to the cutting edge
• Conforms to DIN 6537K specification for consistent metric tooling interchangeability

Compatibility

Designed for drilling high temperature alloys and stainless steel. Compatible with standard 6.00 mm straight shank collet holders and drill chucks. Conforms to DIN 6537K specification. Part of the KENNAMETAL Series B291-YPL high-performance drill family.

Installation Notes

Installation and use should be performed by qualified machinists or CNC setup technicians. Ensure the machine spindle and tool holder are clean and free of runout before seating the shank. Verify coolant-through lines are active before engaging the cut when using the internal coolant feature. Do not exceed the maximum drilling depth of 14.00 mm per pass without retracting to clear chips.