Hertel 30212000 Solid Carbide Circuit Board Drill Bit No. 31

Product Description

The HERTEL 30212000 is a solid carbide circuit board drill bit sized to No. 31 wire gauge, measuring 0.1200 inches in diameter. Designed for precision drilling in printed circuit board fabrication and electronics manufacturing, this bit features a 130-degree drill point and a fast spiral with a 35-degree helix angle that efficiently evacuates chips and reduces heat buildup. The tapered web configuration improves rigidity and point stability during entry. At 1.5 inches overall length with a 0.375-inch flute, this compact geometry suits high-speed spindle applications. Licensed machinists, electronics technicians, and precision metalworking shops are the typical users.

This drill bit is suited for use in benchtop drill presses, CNC drilling machines, and PCB drilling stations. Beyond circuit board work, the solid carbide construction and bright polished finish make it capable across a broad range of materials including alloy steel, carbon steel, cast iron, high-temperature alloy, stainless steel, and titanium. Its right-hand cutting direction is standard for conventional drill setups. The 0.1250-inch shank diameter fits standard collets and chucks used in precision machine shops and electronics assembly environments.

Key Features

• Solid carbide construction for extended tool life and rigidity in hard and abrasive materials
• 130-degree drill point angle optimized for circuit board and metalworking applications
• Fast spiral with 35-degree helix angle promotes efficient chip evacuation
• Tapered web configuration improves point strength and reduces walking on entry
• Bright polished finish minimizes friction and aids chip flow
• Right-hand cutting, compatible with standard spindle rotation

Compatibility

Designed as a direct-fit replacement or standard addition for any drill press, CNC drilling machine, or PCB drilling spindle that accepts a 0.1250-inch (1/8 inch) shank. Compatible materials include alloy steel, carbon steel, cast iron, high-temperature alloy, stainless steel, and titanium.

Installation Notes

Install into a collet or drill chuck rated for the 0.1250-inch shank diameter and confirm the collet is clean and properly seated before tightening. Ensure the machine spindle is fully stopped before changing bits. Use appropriate spindle speeds for carbide tooling and the workpiece material — carbide bits are brittle and can fracture if subjected to lateral loading or improper feed rates. Eye protection and chip containment are standard safety practice for any drilling operation.