Hertel 30006700 Circuit Board Drill Bit No. 51 Solid Carbide

Product Description

The HERTEL 30006700 is a solid carbide circuit board drill bit designed for precision drilling in printed circuit board fabrication and tight-tolerance applications. It carries a No. 51 wire gauge designation, corresponding to a 0.0670 inch (1.70 mm) diameter, and features a 118-degree drill point angle with a fast spiral flute geometry and 35-degree helix angle. The tapered web configuration improves chip evacuation and reduces thrust during drilling. Right-hand cutting direction is standard. This bit is sized for use in CNC drilling equipment and precision drill presses operated by machinists, PCB technicians, and tool-and-die professionals.

This bit suits drilling operations in cast iron, non-ferrous metals, and steel, in addition to its primary circuit board application. The 0.625 inch flute length and 1.5 inch overall length make it well matched to shallow-depth, high-precision work on thin substrates and sheet stock. The bright polished coating reduces friction and aids chip flow. It is sold individually and fits standard collet-style spindle tooling common to precision benchtop and CNC drilling platforms.

Key Features

• Solid carbide construction for rigidity and wear resistance in precision drilling
• No. 51 wire size — 0.0670 inch (1.70 mm) diameter for tight-tolerance holes
• 118-degree drill point angle with fast spiral and 35-degree helix for efficient chip removal
• Tapered web configuration reduces thrust and improves hole entry accuracy
• Bright polished finish minimizes friction during cutting
• Diameter tolerance of -0.0005 to +0.0000 inch ensures consistent hole sizing

Compatibility

Designed as a direct-fit replacement or new-installation drill bit for CNC and precision drilling equipment that accepts 0.0670 inch (1.70 mm) shank tooling. Suitable for cast iron, non-ferrous metals, and steel workpieces in addition to circuit board substrates.

Installation Notes

Secure the bit in a collet or drill chuck rated for the 0.0670 inch shank diameter before use. Confirm spindle speed and feed rate are appropriate for the workpiece material and bit diameter before beginning a drilling cycle. Inspect the cutting edges for chipping before each use, as carbide tips are brittle and sensitive to side loading. Handle with care to avoid contact with hard surfaces that could chip the cutting tip.