Hertel 30024600 Letter D Circuit Board Drill Bit Solid Carbide

Product Description

The HERTEL 30024600 is a solid carbide circuit board drill bit sized to Letter D (0.2460 inches / 6.25 mm) with a 118-degree drill point angle and a fast spiral flute design. Built to heavy-duty grade standards, it delivers precise, clean entry holes in demanding materials including cast iron, non-ferrous metals, and plastics. The bright polished finish reduces friction and aids chip evacuation. The tapered web configuration and 35-degree helix angle work together to maintain cutting efficiency through the full flute depth. Licensed HVAC, electrical, and industrial technicians as well as precision fabricators will find this bit suited to controlled, tight-tolerance drilling operations.

This bit is designed for applications where hole location accuracy and surface finish matter, such as circuit board fabrication, light industrial assembly, and precision component drilling in cast iron and non-ferrous metal workpieces. The 0.7500-inch flute length and 1.5-inch overall length make it well-suited for benchtop drill presses and CNC drilling equipment where short, rigid tooling is preferred. It is appropriate for both production and low-volume repair environments.

Key Features

• Solid carbide construction for extended tool life in abrasive materials
• 118-degree drill point angle for general-purpose and circuit board drilling
• Fast spiral flute with 35-degree helix angle for efficient chip removal
• Tapered web configuration improves rigidity and reduces walking on entry
• Bright polished coating minimizes friction and heat buildup
• Heavy-duty grade with tight diameter tolerance of -0.0005 to +0.0000 inches

Compatibility

Designed as a standard Letter D drill bit replacement for use in benchtop drill presses, CNC drilling machines, and hand-held drilling equipment that accepts a 0.2460-inch (6.25 mm) shank. Suitable for drilling cast iron, non-ferrous metals, and plastics.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or technicians familiar with proper tooling practices. Ensure the drill press or CNC spindle is fully stopped and de-energized before inserting or removing the bit. Confirm the collet or chuck is rated for the 6.25 mm shank diameter and that the tool is seated and tightened to the equipment manufacturer's specification. Do not exceed the recommended spindle speed for the workpiece material and bit diameter.