Hertel 30020550 Circuit Board Drill Bit No 5 Solid Carbide

Product Description

The HERTEL 30020550 is a solid carbide circuit board drill bit designed for precision drilling in printed circuit board fabrication and close-tolerance metalworking applications. It carries a Number 5 wire gauge size, equivalent to 0.2055 inches (5.22 mm) in diameter, with a 118-degree drill point angle that produces clean entry without excessive thrust. The fast spiral flute geometry and 35-degree helix angle promote efficient chip evacuation, keeping the cutting zone clear during high-cycle drilling. At 1.5 inches overall length with a 0.75-inch flute, this bit is sized for shallow, accurate holes in thin materials.

This drill bit is rated for use in cast iron, non-ferrous metals, and steel. Its heavy-duty grade and bright polished finish make it suitable for production environments where consistent hole quality matters. Typical applications include PCB fabrication shops, precision machine shops, and tool rooms where wire-gauge sizing is required. The tapered web configuration adds rigidity at the core, reducing deflection during entry into harder workpiece materials.

Key Features

• Solid carbide construction for extended tool life in abrasive and hard materials
• 118-degree drill point angle for accurate, low-thrust entry
• Fast spiral flute with 35-degree helix angle for efficient chip evacuation
• Tapered web configuration provides core rigidity and reduces bit deflection
• Bright polished finish minimizes friction and built-up edge on non-ferrous materials
• Heavy-duty grade rated for cast iron, non-ferrous metals, and steel

Compatibility

Designed for use in standard drill chucks and CNC drilling spindles accepting a 0.2055-inch (5.22 mm) shank diameter. Suitable for circuit board drilling operations and general-purpose precision hole making in cast iron, non-ferrous metals, and steel workpieces.

Installation Notes

Installation and use should be performed by qualified machinists or tooling technicians familiar with carbide drill handling. Solid carbide bits are brittle and should not be subjected to side loading or flex; always ensure the workpiece is rigidly fixtured before drilling. Inspect the cutting edges before each use, as carbide chipping is not always visible to the naked eye. Follow all applicable shop safety protocols for rotating cutting tools, including appropriate chip guarding and eye protection.