Hertel 30001800 Circuit Board Drill Bit 0.46mm No. 77

Product Description

The HERTEL 30001800 is a solid carbide fast spiral drill bit designed for precision drilling in circuit board and light manufacturing applications. It carries a No. 77 wire gauge size, equivalent to 0.0180 decimal inches (0.46 mm), with a 118-degree drill point angle optimized for clean entry on small-diameter holes. The shank diameter measures 0.46 mm, the flute length is 0.25 inches, and the overall length is 1.5 inches. A 35-degree helix angle and tapered web configuration promote chip evacuation and reduce heat buildup during high-speed drilling. This bit is intended for installation by machinists, PCB fabricators, and precision drilling technicians.

The HERTEL 30001800 is suited for drilling cast iron, non-ferrous metals, and steel in applications where tight tolerances and small bore diameters are required. Typical use cases include circuit board fabrication, precision instrument manufacturing, and small-part production. The bright polished finish reduces friction and extends cutting life across repeated drilling cycles. The heavy-duty grade construction supports production environments where consistent hole quality at sub-millimeter diameters is critical.

Key Features

• Solid carbide construction for rigidity and wear resistance in small-diameter drilling
• No. 77 wire gauge size at 0.0180 inches (0.46 mm) diameter for precision bore work
• 118-degree drill point angle for clean entry and accurate hole positioning
• 35-degree helix angle with fast spiral flute design promotes efficient chip removal
• Tapered web configuration reduces thrust and supports straight-hole geometry
• Bright polished finish minimizes friction and extends tool life

Compatibility

Designed as an OEM-style replacement or direct-use drill bit compatible with standard CNC drill presses, PCB drilling machines, and precision drill chucks that accept 0.46 mm shank diameters.

Installation Notes

Installation and use should be performed by qualified machinists or PCB drilling technicians familiar with small-diameter carbide tooling. Secure the shank fully in the chuck before operation and verify runout is within acceptable tolerance to prevent bit breakage at this diameter. Carbide bits are brittle and should not be subjected to side loading or used in hand-held drilling applications. Follow machine manufacturer feed rate and RPM recommendations for carbide tooling at sub-millimeter diameters.