Hertel 30204690 Circuit Board Drill Bit 3/64 Inch Solid Carbide

Product Description

The HERTEL 30204690 is a solid carbide circuit board drill bit designed for precision drilling in printed circuit boards and other tight-tolerance applications. It features a 3/64 inch (0.0469 inch decimal) diameter with a 130-degree drill point angle optimized for clean entry and exit in hard, abrasive materials. The fast spiral geometry and 35-degree helix angle promote efficient chip evacuation, reducing heat buildup and extending tool life. The tapered web configuration adds rigidity at the cutting tip. This bit is intended for use by machinists, electronics technicians, and trade professionals who require repeatable, accurate small-diameter holes in dense materials.

This drill bit is suited for drilling alloy steel, carbon steel, cast iron, high-temperature alloys, stainless steel, and titanium. The 1/8 inch shank diameter accommodates standard collets and drill chucks found on CNC machines, drill presses, and handheld precision drilling equipment. The 3/8 inch flute length and 1-1/2 inch overall length make it practical for compact fixture setups and shallow-depth drilling operations common in electronics manufacturing, HVAC control board service, and light fabrication work.

Key Features

• Solid carbide construction for hardness and wear resistance in abrasive materials
• 130-degree drill point angle for clean penetration in hard substrates
• Fast spiral with 35-degree helix angle for efficient chip evacuation
• Tapered web configuration adds tip rigidity and reduces deflection
• Bright polished finish reduces friction and aids chip flow
• Right-hand cutting direction compatible with standard drilling equipment

Compatibility

Designed for use in standard 1/8 inch collets and drill chucks on CNC drilling machines, benchtop drill presses, and handheld precision drilling equipment. Compatible with alloy steel, carbon steel, cast iron, high-temperature alloys, stainless steel, and titanium workpieces.

Installation Notes

Install in a properly sized 1/8 inch collet or drill chuck and verify runout before drilling to prevent tip breakage on this small-diameter carbide bit. Power down and de-energize any board or assembly before drilling into live circuit boards or electrical components. Use appropriate spindle speeds for carbide tooling in the target material — consult tooling speed and feed references for the specific workpiece. Carbide is brittle; avoid side loads and do not use this bit for slot milling or angled entry cuts.