Hertel 30014050 Circuit Board Drill Bit Size 28 Solid Carbide

Product Description

The HERTEL 30014050 is a solid carbide circuit board drill bit designed for precision drilling in printed circuit board fabrication and related small-diameter applications. Built to a wire gauge size 28 (0.1405 inches decimal), it features a 118-degree point angle and a fast spiral flute geometry that promotes efficient chip evacuation in tight, small-bore work. The bright, uncoated finish is standard for solid carbide tooling used where coating adhesion or contamination is a concern. At 1.5 inches overall length with a 0.75-inch flute, this bit is sized for benchtop drilling machines and CNC drill presses used by electronics fabricators and precision machinists.

This drill bit is suited for drilling cast iron, non-ferrous metals, and steel in addition to its primary circuit board application. The fast spiral and tapered web configuration make it effective in thin-material and multi-layer board stacks where clean entry and exit holes are critical. It is sold individually and is appropriate for shops, production lines, and field service technicians who require a single replacement bit without committing to a bulk quantity.

Key Features

• Solid carbide construction for rigidity and extended tool life in small-diameter drilling
• Wire size 28 (0.1405 inches / 3.57 mm) decimal diameter for precise fit in circuit board drill patterns
• 118-degree point angle for clean, accurate hole entry
• Fast spiral flute with tapered web promotes chip clearance and reduces heat buildup
• Right-hand cut, bright uncoated finish compatible with standard drill chuck setups
• 35-degree helix angle suited for cast iron, non-ferrous metals, and steel

Compatibility

Designed as a direct-use solid carbide circuit board drill bit for use with standard CNC and manual drill presses accepting a 0.1405-inch shank diameter. Rated for material applications including cast iron, non-ferrous metal, and steel.

Installation Notes

This bit is installed by machinists and electronics fabricators in drill press or CNC drilling equipment. Ensure the spindle and collet or chuck are fully de-energized and at rest before inserting or removing the bit. Solid carbide tooling is brittle and susceptible to chipping if dropped or subjected to lateral load — handle with care during installation. Verify spindle runout and collet concentricity before use to protect the cutting edge and maintain hole-diameter tolerance.