Kennametal 3759718 Carbide Drill Bit 3.90 Mm Tialn

Product Description

The KENNAMETAL 3759718 is a screw machine length (stub length) solid carbide drill bit designed for high-precision drilling in demanding production environments. It measures 3.90 mm in diameter with an overall length of 66.00 mm and a 140-degree standard point angle. The multilayer TiAlN coating improves wear resistance and heat tolerance, making this bit well-suited for dry or semi-dry cutting in hard and abrasive materials. Two regular spiral flutes and a tapered web provide efficient chip evacuation. Coolant-through capability allows internal coolant delivery for deeper, higher-speed applications. This bit conforms to DIN 6537K specification.

This drill bit is intended for use in CNC machining centers, drill presses, and screw machine operations where close-tolerance hole quality is required. The stub-length profile increases rigidity and reduces deflection compared to jobber-length drills, making it a preferred choice when drilling into alloy steels, stainless steels, cast iron, and other hard materials. The straight cylindrical shank with a 6.00 mm shank diameter seats directly into standard collet chucks and tool holders. It is typically installed and operated by machinists and CNC operators in production shop environments.

Key Features

• Solid carbide construction for maximum rigidity and tool life in hard materials
• Multilayer TiAlN coating for elevated heat and wear resistance
• 140-degree standard point angle reduces thrust and improves self-centering
• Coolant-through design supports internal coolant delivery for deep-hole or high-speed applications
• Stub (screw machine) length reduces deflection and improves hole accuracy
• Conforms to DIN 6537K specification for consistent dimensional standards

Compatibility

Part of the KENNAMETAL Series B291-YPL, designed for use in standard collet chucks and tool holders accepting a 6.00 mm straight cylindrical shank. Suitable for drilling applications within the 3.50 mm to 5.00 mm diameter size range covered by this series.

Installation Notes

Installation and operation should be performed by qualified machinists or CNC operators. Ensure the machine spindle is fully stopped and the tool holder is secure before changing or inspecting the bit. Verify collet chuck concentricity to maintain diameter tolerance of +0.004 to +0.016 mm. When using coolant-through capability, confirm that the tool holder and spindle are rated for internal coolant delivery before enabling coolant flow.