Kennametal 3640745 Solid Carbide Jobber Drill 4.30 Mm

Product Description

The KENNAMETAL 3640745 is a solid carbide jobber-length drill designed for high-performance hole-making in demanding materials. It features a 4.30 mm cutting diameter, a 140-degree split point geometry with web thinning, and an AlTiN (aluminum titanium nitride) coating that extends tool life in abrasive and high-heat applications. The straight-cylindrical shank measures 6 mm in diameter, and the overall length is 74.00 mm. Coolant-through capability allows internal coolant delivery directly to the cutting zone, reducing heat buildup and chip evacuation issues in deep-hole drilling cycles. This drill is intended for use by machining professionals and tool-and-die shops running CNC drilling operations.

The 3640745 is suited for drilling steel, stainless steel, and high-temperature alloys in production environments where tool life and hole quality are critical. The 5xD flute-to-diameter ratio and 36.00 mm flute length support drilling to a maximum depth of 29.00 mm. The DIN 6537K specification ensures dimensional consistency for use in standard toolholding systems. Typical applications include precision hole drilling on CNC machining centers and drill presses in aerospace, automotive, and industrial manufacturing settings.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard and abrasive materials
• AlTiN coating provides thermal barrier and oxidation resistance for extended tool life
• 140-degree point angle with web thinning reduces thrust force and improves centering accuracy
• Coolant-through design delivers cutting fluid directly to the drill tip for chip control and heat management
• Regular spiral flute geometry supports efficient chip evacuation in steel and stainless steel
• Conforms to DIN 6537K specification for dimensional reliability in standard CNC toolholding

Compatibility

Designed for use with standard straight-shank toolholders accepting a 6 mm shank diameter. Intended for drilling steel, stainless steel, and high-temperature alloys as noted in the product specifications.

Installation Notes

Installation should be performed by qualified machining personnel familiar with CNC toolholding systems and cutting tool setup procedures. Ensure the machine spindle is fully stopped and the tool is securely clamped in the holder before operation. Verify coolant-through passages are clear and coolant pressure is within the machine and toolholder specifications before running. Do not exceed the maximum recommended drilling depth of 29.00 mm for this drill geometry without consulting feed and speed data appropriate to the workpiece material.