Hertel 30208900 No. 43 Circuit Board Drill Bit Solid Carbide

Product Description

The HERTEL 30208900 is a solid carbide circuit board drill bit sized to wire gauge No. 43, with a decimal diameter of 0.0890 inches and a 1/8-inch shank. It features a 130-degree drill point angle and a fast spiral flute design with a 35-degree helix angle, making it well suited for clean, accurate holes in thin, dense substrates. The tapered web configuration adds rigidity and helps resist deflection at small diameters. Overall length is 1-1/2 inches with a 3/8-inch flute length. This bit is intended for use by machinists, electronics technicians, and PCB fabrication professionals working with precision small-diameter drilling.

This drill bit is designed for use in circuit board and precision machining applications where tight hole tolerances are required. The solid carbide construction and bright polished finish support drilling into a range of materials including alloy steel, carbon steel, cast iron, high temperature alloys, stainless steel, and titanium. It is appropriate for both manual and CNC-driven spindle applications where rigidity and positional accuracy are critical. Right-hand cutting direction is standard.

Key Features

• Wire gauge No. 43 size with 0.0890-inch decimal diameter for precise small-bore applications
• Solid carbide construction delivers rigidity and wear resistance in hard and abrasive materials
• 130-degree drill point angle optimized for circuit board and thin-material entry
• Fast spiral flute with 35-degree helix angle promotes efficient chip evacuation
• Tapered web configuration reduces deflection and improves hole straightness
• Bright polished finish minimizes friction and surface buildup during cutting

Compatibility

Designed as a precision replacement or production-use drill bit for circuit board drilling operations and small-diameter machining applications across compatible spindle toolholders accepting a 1/8-inch straight shank.

Installation Notes

This bit is installed by machinists or PCB fabrication technicians using drill presses, CNC routers, or dedicated PCB drilling machines that accept a 1/8-inch shank collet or chuck. Ensure the spindle and workpiece are properly secured before operation. Verify collet runout is within acceptable limits, as excess runout at this diameter can cause bit breakage or out-of-tolerance holes. Follow machine manufacturer speed and feed guidelines for solid carbide tooling in the target material.