Kennametal 4149304 Solid Carbide Jobber Drill 7/16 in

Product Description

The KENNAMETAL 4149304 is a solid carbide jobber-length drill designed for high-performance hole-making in demanding materials. It features a 140-degree point angle, multilayer TiAlN coating, and a right-hand, regular spiral flute configuration. The drill measures 0.4375 inches (7/16 inches) in diameter with an overall length of 4.646 inches and a flute length of 2.795 inches. The straight cylindrical shank, 0.1406 inches in diameter, seats securely in standard drill chucks or collet holders. Licensed machinists, toolroom operators, and CNC setup technicians install this drill for production and maintenance drilling applications where tool life and hole quality are critical.

This jobber drill is suited for drilling steel, stainless steel, cast iron, aluminum, and other non-ferrous materials in both production-floor and job-shop environments. The 5xD flute-to-diameter ratio supports efficient chip evacuation at standard jobber depths. Coolant-through capability allows internal coolant delivery directly to the cutting zone, making it effective in CNC machining centers and drill presses equipped with through-spindle coolant. The DIN 6537K specification designation confirms dimensional conformance to that standard. It is appropriate for both horizontal and vertical machining setups requiring consistent, repeatable hole diameters in tough workpiece materials.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard and abrasive materials
• 140-degree point angle reduces thrust force and improves self-centering on entry
• Multilayer TiAlN coating extends tool life in high-temperature cutting environments
• Coolant-through design delivers cutting fluid directly to the tip for heat management and chip flushing
• Right-hand, regular spiral flute geometry promotes efficient chip removal during through-hole and blind-hole drilling
• Tapered web configuration maintains core strength while reducing cutting resistance

Compatibility

Designed as an OEM-specification jobber drill conforming to DIN 6537K for use in CNC machining centers, drill presses, and similar equipment fitted with standard straight-shank toolholders or collet chucks accepting a 0.4375-inch diameter shank.

Installation Notes

Installation and use of this drill should be performed by qualified machinists or toolroom personnel familiar with CNC or manual drilling equipment. Ensure the spindle is fully stopped and the machine is locked out before loading or removing the drill from the toolholder. Verify collet or chuck runout is within acceptable limits before cutting, as excessive runout accelerates carbide wear and degrades hole tolerance. Do not use this drill to ream, side-mill, or pry; carbide is brittle and will fracture under lateral loading.