Kennametal 4150726 Solid Carbide Jobber Drill 23/64 Inch

Product Description

The KENNAMETAL 4150726 is a solid carbide jobber-length drill bit designed for high-performance drilling in demanding production environments. It measures 23/64 inch (0.3594 inch decimal) in diameter and features a 140-degree split point geometry that reduces walking and improves entry accuracy. The multilayer TiAlN coating resists heat buildup during high-speed cutting, extending tool life in abrasive materials. With a right-hand spiral flute and a whistle notch shank for positive drive retention, this drill is built for machine shop, fabrication, and industrial maintenance applications where consistency and tool life are critical priorities.

This jobber drill is suited for drilling steel, stainless steel, cast iron, aluminum, and other non-ferrous materials. The 2.4016-inch flute length and 4.0551-inch overall length place it in the standard jobber range, making it compatible with CNC machining centers, drill presses, and manual mills equipped with appropriate collet or chuck systems. The whistle notch shank provides positive angular positioning when used with matching holders, reducing the risk of slippage under load. It is a high-performance grade tool intended for professional machine operators and toolroom technicians.

Key Features

• Solid carbide construction provides rigidity and wear resistance superior to high-speed steel in hard or abrasive materials
• Multilayer TiAlN coating extends tool life by resisting thermal degradation at elevated cutting speeds
• 140-degree point angle reduces thrust force and minimizes drill walk on entry
• Right-hand regular spiral flute promotes efficient chip evacuation
• Whistle notch shank design ensures positive drive engagement and prevents shank rotation in compatible holders
• Rated for steel, stainless steel, cast iron, aluminum, and non-ferrous workpiece materials

Compatibility

Designed for use in CNC machining centers, drill presses, and milling machines equipped with holders or chucks accepting a whistle notch shank in the 0.3500 to 0.4000 inch diameter range. Suitable for drilling steel, stainless steel, cast iron, aluminum, and non-ferrous materials.

Installation Notes

This tool should be installed by a qualified machine operator familiar with carbide tooling requirements. Ensure the spindle and holder are clean and free of debris before seating the whistle notch shank to achieve proper engagement. Carbide is brittle compared to high-speed steel — avoid side loading, interrupted cuts without appropriate feed adjustments, or dropping the tool. Confirm spindle speed and feed rate are appropriate for the workpiece material and drill diameter before beginning the cut.