Hertel 61699591 Screw Machine Drill Bit Wire 30 Hss

Product Description

The HERTEL 61699591 is a screw machine length drill bit designed for high-speed steel cutting in metal fabrication, machining, and general-purpose drilling applications. Built from high-speed steel with an oxide finish, it carries a wire gauge size of 30, which corresponds to a decimal diameter of 0.1285 inches. The 118-degree standard point angle provides reliable, self-centering entry on most common materials. With a compact overall length of 1-15/16 inches, this stub-length bit delivers increased rigidity and reduced deflection compared to jobber-length alternatives, making it well suited for drill press and CNC machine tool use.

This bit is intended for general-purpose drilling in ferrous and non-ferrous metals, plastics, and composite materials. The screw machine length format is a standard choice in production machining environments where short, rigid tooling minimizes runout and allows work close to the chuck or spindle face. The right-hand spiral flute geometry evacuates chips efficiently during through-hole and blind-hole operations. It meets ANSI specification standards, confirming dimensional consistency across the production run.

Key Features

• Wire size 30 cutting diameter - 0.1285 inches decimal equivalent
• 118-degree standard point angle for self-centering entry on common materials
• High-speed steel construction with oxide coating for surface protection and reduced friction
• Screw machine (stub) length at 1-15/16 inches OAL delivers superior rigidity over jobber-length bits
• Right-hand cut with regular spiral, 2-flute design for efficient chip evacuation
• ANSI specification designation ensures dimensional interchangeability

Compatibility

Designed as an OEM-style general-purpose screw machine length drill bit suitable for standard 3-jaw chucks, drill presses, CNC machining centers, and hand drills accepting straight-cylindrical shanks in the applicable collet or chuck range.

Installation Notes

Installation and use should be performed by machinists or qualified tradespeople following standard machine tool safety practices. Secure the workpiece before drilling and ensure the chuck is firmly tightened on the straight-cylindrical shank before operation. Always power down and de-energize the machine before changing tooling. Cutting fluid or coolant is not required through the bit on this model but may be applied externally to extend tool life when drilling steel.