Kennametal 4149411 Solid Carbide Jobber Drill Bit 3/4 Inches

Product Description

The KENNAMETAL 4149411 is a solid carbide jobber-length drill bit with a 3/4 inch (0.7500 inch) diameter, designed for high-performance drilling in steel, stainless steel, cast iron, and aluminum and non-ferrous materials. It features a 140-degree standard point angle and a multilayer TiAlN coating that extends tool life under demanding cutting conditions. The overall length is 6.0236 inches, with a right-hand spiral flute configuration and a straight cylindrical shank measuring 0.2500 inch in diameter. This bit is coolant-through capable, making it well-suited for production drilling environments where heat management is critical. Machinists and tool-room professionals working in job shops, manufacturing cells, and maintenance operations are the primary users.

This jobber drill is built to DIN 6537K specification, placing it in the high-performance solid carbide category for precision hole-making. It is appropriate for use in CNC machining centers, drill presses, and manual knee mills where a straight-shank toolholder or drill chuck is used. The 5xD flute-by-diameter ratio and a maximum drilling depth of 3.0315 inches make it suitable for moderate-depth through-holes and blind holes in ferrous and non-ferrous workpieces. The tapered web configuration aids chip evacuation and reduces thrust force at the cutting edge.

Key Features

• Solid carbide construction provides rigidity and wear resistance beyond high-speed steel alternatives
• Multilayer TiAlN coating improves heat and oxidation resistance for extended tool life in steel and stainless steel
• Coolant-through design channels coolant directly to the cutting zone, reducing heat buildup at depth
• 140-degree standard point angle reduces walking and improves centering on entry
• Tapered web configuration promotes efficient chip evacuation and lower cutting thrust
• DIN 6537K specification ensures dimensional consistency for repeatable hole tolerances

Compatibility

Designed for use in CNC machining centers and drill presses with straight-shank toolholders or drill chucks accommodating a 0.2500 inch shank diameter. Primary workpiece materials include steel, stainless steel, cast iron, and aluminum and non-ferrous alloys.

Installation Notes

Installation and operation should be performed by qualified machinists familiar with carbide tooling. Secure the straight shank in a properly sized collet chuck or drill chuck and verify runout before beginning a cut, as carbide is more brittle than high-speed steel and sensitive to lateral loading. Engage coolant flow before contact with the workpiece when using the through-coolant feature. Avoid interrupting the cut with excessive feed variation, which can chip the cutting edge.