Hertel 30002500 Circuit Board Drill Bit No. 72 Solid Carbide

Product Description

The HERTEL 30002500 is a solid carbide circuit board drill bit designed for precision drilling in PCB fabrication and electronics assembly applications. Built to a No. 72 wire gauge size (0.0250 decimal inch, 0.64 mm), it features a 118-degree drill point angle and a fast spiral flute geometry with a 35-degree helix angle. The tapered web configuration and bright polished finish support clean, accurate entry into tight-tolerance board materials. This bit is intended for use by electronics technicians, PCB manufacturers, and precision machining shops requiring consistent hole quality at small diameters.

The 30002500 is suited for drilling cast iron, non-ferrous metals, and steel in addition to circuit board materials. The 0.5-inch flute length and 1.5-inch overall length make it appropriate for shallow, precision drilling operations on benchtop drill presses and CNC drilling machines used in electronics and light manufacturing environments. Right-hand cutting direction is standard. The heavy-duty grade designation reflects the solid carbide construction, which maintains rigidity and edge retention at small diameters where high-speed steel alternatives deflect under load.

Key Features

• No. 72 wire gauge size — 0.0250 inch (0.64 mm) diameter for precision PCB and micro-drilling work
• 118-degree drill point angle with tapered web for accurate self-centering on entry
• Fast spiral flute with 35-degree helix angle for efficient chip evacuation
• Solid carbide construction rated heavy-duty for rigidity and edge retention at micro diameters
• Bright polished coating reduces friction and aids in chip clearance
• Right-hand cutting direction; compatible with standard drill press and CNC spindle setups

Compatibility

Designed as a direct-fit replacement-style circuit board drill bit for use in CNC PCB drilling machines, benchtop drill presses, and precision drilling fixtures that accept a 0.64 mm (0.0252 inch) shank diameter.

Installation Notes

Installation and use of micro drill bits at this diameter should be performed by qualified technicians familiar with CNC drilling equipment or precision drill press operation. Ensure the spindle and chuck are clean and free of debris before seating the shank to prevent runout. At sub-millimeter diameters, excessive feed pressure is the primary cause of bit breakage — follow the machine manufacturer's recommended feed and speed parameters for solid carbide tooling. Inspect the cutting edge under magnification before use and replace the bit if chipping or edge wear is observed.