Hertel 16704777 Screw Machine Drill Bit Size 51 Solid Carbide

Product Description

The HERTEL 16704777 is a screw machine length drill bit designed for precision drilling in hard and abrasive workpiece materials. Built from solid carbide, this bit handles demanding applications where high-speed steel tooling falls short. The 135-degree split-point geometry reduces walking and lowers thrust force at entry, making it well suited for production drilling in tight-tolerance work. With a wire gauge size of 51 and a decimal equivalent of 0.0670 inches, it targets small-diameter hole requirements common in precision machining and fabrication. The straight cylindrical shank is compatible with standard drill chucks. Two slow-spiral flutes support controlled chip evacuation in the materials this tool is designed to cut.

This drill bit is intended for use in screw machine, drill press, and CNC drilling operations where short, rigid tooling is preferred. Primary workpiece materials include cast iron, nickel alloy, stainless steel, titanium alloy, and tool steel. Its screw machine length profile provides added rigidity compared to jobber-length bits, reducing deflection in deep or high-feed applications. It is sold individually and is appropriate for machine shops, aerospace component work, and precision fabrication environments where carbide tooling is standard practice.

Key Features

• Solid carbide construction for durability in hard and abrasive materials
• 135-degree point angle reduces drill walk and entry thrust
• Wire gauge size 51, decimal equivalent 0.0670 inches
• Screw machine length for increased rigidity and reduced deflection
• Two slow-spiral flutes for controlled chip flow
• Bright uncoated finish, right-hand cut, straight cylindrical shank

Compatibility

Designed as a screw machine length replacement drill bit for use in standard drill chucks and collet systems accepting straight cylindrical shanks. Suited for drilling cast iron, nickel alloy, stainless steel, titanium alloy, and tool steel workpieces.

Installation Notes

This tool is installed and operated by machinists or toolroom technicians using drill presses, screw machines, or CNC machining centers. Ensure the machine spindle is fully stopped and the chuck or collet is properly tightened before beginning any drilling operation. Solid carbide tooling is brittle and susceptible to breakage from side loading or interrupted cuts at incorrect feeds and speeds. Always refer to the machine manufacturer and tooling guidelines for appropriate spindle speed and feed rate selection for the workpiece material.