Kennametal 4150737 Solid Carbide Jobber Drill 25/64 Inch

Product Description

The KENNAMETAL 4150737 is a solid carbide jobber-length drill bit designed for high-performance hole-making in demanding production environments. Sized at 25/64 inch (0.3906 inch decimal), it features a 140-degree point angle that reduces thrust and improves centering on entry. The multilayer TiAlN coating increases surface hardness and thermal resistance, extending tool life in high-speed applications. A right-hand spiral flute geometry promotes efficient chip evacuation. This drill is installed and operated by machinists, tool-and-die technicians, and maintenance mechanics running CNC machining centers, drill presses, or manual machines.

This jobber drill is suited for drilling steel, stainless steel, cast iron, aluminum, and other non-ferrous materials in both production and job-shop settings. The whistle notch shank provides positive retention in compatible tool holders and chucks, reducing pullout risk under high feed rates. With a flute length of approximately 2.40 inches and an overall length of approximately 4.06 inches, it fits standard jobber-length drill chuck setups on vertical machining centers and radial arm drill presses. It is a solid choice for through-hole and blind-hole operations where dimensional accuracy and tool life are priorities.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard and abrasive workpiece materials
• 140-degree point angle reduces entry thrust and improves self-centering on flat and curved surfaces
• Multilayer TiAlN coating provides high-temperature resistance and extended cutting edge life
• Right-hand regular spiral flute promotes smooth chip flow and reduces chip packing
• Whistle notch shank ensures positive retention and minimizes shank slippage in drill holders
• High-performance grade rated for steel, stainless steel, cast iron, aluminum, and non-ferrous materials

Compatibility

Designed as a high-performance OEM-style solid carbide jobber drill for use in standard whistle notch tool holders and chucks accepting a 25/64 inch shank diameter across CNC and manual drilling equipment.

Installation Notes

Installation and operation should be performed by qualified machinists or maintenance technicians familiar with cutting tool safety. Ensure the machine spindle is fully stopped and all energy is locked out before changing tooling. Verify the whistle notch shank is fully seated and the retention setscrew or chuck jaws are properly engaged before starting the spindle. Do not exceed the recommended surface footage and feed rate parameters for the workpiece material being drilled, and use appropriate personal protective equipment including eye and face protection.