Hertel 30211300 Circuit Board Drill Bit No 33 Solid Carbide

Product Description

The HERTEL 30211300 is a solid carbide circuit board drill bit designed for precision drilling in printed circuit board fabrication and other tight-tolerance applications. It carries a No. 33 wire gauge designation with a decimal diameter of 0.1130 inches (2.87 mm) and a 130-degree drill point angle suited for clean entry and reduced thrust. The fast spiral flute geometry and 35-degree helix angle promote efficient chip evacuation in through-hole drilling operations. The bright polished finish reduces friction and helps maintain dimensional accuracy at the cutting edge. Licensed electricians, PCB assembly technicians, and precision machine shops are the primary installers and users of this bit.

This bit is configured for right-hand cutting and features a tapered web for added rigidity at small diameters. With a 1/8-inch (0.1250-inch decimal) shank diameter, it seats in standard drill chucks and CNC spindle collets without adapters. The 3/8-inch flute length accommodates typical PCB stack thicknesses, and the 1-1/2-inch overall length keeps runout manageable in high-speed spindles. Material applications include alloy steel, carbon steel, cast iron, high-temperature alloy, stainless steel, and titanium, making it usable well beyond board drilling in light machining work.

Key Features

• Solid carbide construction for superior hardness and wear resistance at small diameters
• No. 33 wire size, 0.1130-inch decimal diameter for tight-tolerance through-hole work
• 130-degree drill point angle reduces thrust and improves entry accuracy
• Fast spiral flute with 35-degree helix angle for efficient chip evacuation
• Tapered web design adds rigidity and reduces deflection at the cutting tip
• Bright polished finish minimizes friction and extends cutting life

Compatibility

Designed as an OEM-style replacement or direct-use precision drill bit for applications requiring a No. 33 wire gauge diameter; compatible with standard drill chucks and CNC collets accepting a 1/8-inch shank. Rated for use in alloy steel, carbon steel, cast iron, high-temperature alloy, stainless steel, and titanium workpieces.

Installation Notes

Installation and use should be performed by qualified machinists or PCB fabrication technicians familiar with high-speed drilling equipment. Secure the shank fully in the collet or chuck before operation and verify runout is within tolerance before drilling. Solid carbide bits are brittle compared to high-speed steel — avoid lateral loading, side pressure, or interrupted cuts that can cause chipping or fracture. Power down and de-energize the spindle completely before changing or inspecting the bit.