Hertel 74148834 Screw Machine Drill Bit 0.1719 in Carbide

Product Description

The HERTEL 74148834 is a solid carbide screw machine length drill bit designed for high-performance drilling in demanding materials. Built to grade C2 carbide, it features a 135-degree split point that reduces walking and allows drilling without a center punch in most applications. The slow spiral flute geometry promotes chip evacuation in deep or interrupted cuts. At 0.1719 inches (11/64 inch) in diameter, this bit is suited for precision hole-making in production and maintenance environments. It is installed by machinists, tool-and-die professionals, and industrial maintenance technicians working with CNC machines, drill presses, and hand-held pneumatic drills.

This drill bit is optimized for cutting cast iron, nickel alloys, stainless steel, titanium alloys, and tool steel - materials that require the hardness and heat resistance of solid carbide. The bright uncoated finish keeps the cutting edge sharp for initial cuts and makes wear inspection straightforward. The screw machine length format offers a shorter, stiffer profile than jobber-length bits, reducing deflection and improving hole location accuracy in tight-tolerance work. Right-hand cut, straight-cylindrical shank fits standard drill chucks without modification.

Key Features

• Solid carbide C2 grade construction for drilling hard and abrasive materials
• 135-degree split point reduces thrust and eliminates center punch requirement
• Slow spiral flute with web-thinned, parallel web configuration for controlled chip flow
• Bright/uncoated finish for easy wear inspection and sharp initial cutting performance
• Screw machine length body provides added rigidity and reduced deflection
• Diameter tolerance held to +0.0000 to -0.0005 inches for precision fitment

Compatibility

Designed for use in standard straight-shank drill chucks on CNC machining centers, drill presses, and pneumatic or electric hand drills; suitable for drilling cast iron, nickel alloy, stainless steel, titanium alloy, and tool steel workpieces.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance technicians familiar with cutting tool speeds and feeds for carbide tooling. Secure the straight-cylindrical shank fully in a matched drill chuck before use and verify chuck tightness. Carbide bits are brittle - avoid side loading, impact, or using them in hammer-drill mode. Consult the machine manufacturer and applicable shop safety standards for appropriate spindle speeds when cutting hard alloys.