Hertel 77428720 Reduced Shank Drill Bit 23/32 in Hss

Product Description

The HERTEL 77428720 is a reduced shank twist drill bit designed for drilling into low and medium tensile strength materials. It features a 23/32 inch cutting diameter with a 1/2 inch Weldon flat shank, allowing it to seat securely in milling-style chucks and reducing slippage under load. The 118-degree standard point angle is a general-purpose geometry suited for a wide range of metalworking and fabrication tasks. Overall length is 6 inches with a 3-inch flute length, and the bit is finished with a black oxide coating that provides mild corrosion resistance and reduces friction during cutting. This bit is installed by machinists, maintenance techs, and fabricators working in shop or field environments.

This drill bit is suited for use in drill presses, milling machines, and magnetic drills equipped with Weldon-style tool holders. The 1/2 inch reduced shank allows a larger cutting diameter to be run in a standard 1/2 inch chuck without requiring a larger spindle bore. Typical applications include structural steel fabrication, general metalworking, and maintenance drilling in industrial settings. The right-hand spiral flute configuration handles standard CW-rotation spindles found on most production equipment.

Key Features

• 23/32 inch cutting diameter with 0.7188 inch decimal equivalent for precise job planning
• 1/2 inch Weldon flat shank with 3 flats for positive chuck engagement and reduced bit walk
• 118-degree standard point angle suitable for low and medium tensile strength metals
• Black oxide finish provides mild lubricity and corrosion resistance during service
• 3-inch flute length supports drilling up to 3 inches deep in a single pass
• Right-hand cut, regular spiral flute for use with standard CW-rotation spindles

Compatibility

Designed for use in Weldon-style tool holders and drill chucks accepting a 1/2 inch shank diameter. Best suited for drilling low and medium tensile strength materials including mild steel, aluminum, and similar metals.

Installation Notes

Secure the Weldon flat shank fully into the holder before tightening set screws to ensure all three flats are engaged. Power down and lock out the spindle before changing bits. Use appropriate cutting fluid or lubrication for the workpiece material to extend tool life, even though this bit is rated for dry cutting. Follow applicable ANSI and shop safety standards when operating drilling equipment.