Hertel 16704389 Drill Bit Letter I 0.272 in Solid Carbide

Product Description

The HERTEL 16704389 is a screw machine length drill bit ground to a 135-degree split-point angle and manufactured from solid carbide throughout. Sized at letter I, the cutting diameter measures 0.272 inches. The short, rigid body — 2.6875 inches overall length — reduces deflection and improves hole accuracy in demanding materials. A slow spiral flute geometry controls chip evacuation when drilling hard, work-hardening alloys. The bright, uncoated finish is well suited for dry cutting applications where coating adhesion or heat buildup are not primary concerns. This bit is intended for use by machinists and tool-and-die professionals operating drill presses, CNC machining centers, or manual lathes.

This drill bit is designed for production drilling in hard and difficult-to-machine workpiece materials including cast iron, nickel alloy, stainless steel, titanium alloy, and tool steel. The screw machine length format fits standard drill chucks and collet holders without requiring extended-reach tooling. It is a practical choice for short-hole applications where rigidity and point stability matter more than deep-flute chip clearance. Two flutes keep the tool profile compact while maintaining adequate chip room for these dense materials.

Key Features

• Solid carbide construction provides hardness and wear resistance required for ferrous and exotic alloy drilling
• 135-degree split-point angle reduces thrust force and self-centers on entry without a spotting operation
• Slow spiral flute geometry controls chip flow in gummy, work-hardening materials such as stainless steel and nickel alloy
• Screw machine length body minimizes overhang and deflection compared to jobber length bits
• Bright, uncoated finish suits dry cutting and applications where specific coating chemistry is not required
• Right-hand cut with straight-cylindrical shank for direct use in standard drill chucks and collet systems

Compatibility

Designed as a screw machine length replacement drill bit for drilling operations in cast iron, nickel alloy, stainless steel, titanium alloy, and tool steel using drill presses, CNC machining centers, or manual lathes equipped with standard straight-shank toolholders.

Installation Notes

Installation and use of this tooling should be performed by qualified machinists or tooling professionals. Secure the straight-cylindrical shank fully in the chuck or collet and verify runout before beginning a cut. De-energize the spindle and lock out the machine before changing or inspecting the bit. Do not exceed the spindle speed and feed parameters recommended for carbide tooling in the specific workpiece material being drilled.