Hertel 02388031 Reduced Shank Drill Bit 1-9/64 Inch Hss

Product Description

The HERTEL 02388031 is a reduced shank twist drill bit machined from high-speed steel (HSS) and designed for drilling into low and medium tensile strength materials. The bit measures 1-9/64 inches (1.1406 inches decimal) in cutting diameter with a 1/2-inch straight-cylindrical shank, allowing it to fit standard 1/2-inch drill chucks despite the larger cutting diameter. A 118-degree standard point angle provides a general-purpose cutting geometry suited to a wide range of common shop and field drilling tasks. The oxide finish offers light corrosion resistance and reduces friction during the cut. Overall length is 6 inches with a 3-inch spiral flute, and the right-hand cut direction is standard for conventional drill presses and handheld power drills.

This bit is intended for use on low and medium tensile strength materials such as mild steel, aluminum, plastics, and similar workpieces. The reduced shank design makes it practical in job-site and shop environments where the available chuck capacity is limited to 1/2 inch but a larger bore diameter is required. Typical applications include maintenance and repair work, fabrication tasks, and field drilling where a full-shank bit of this diameter would require a larger chuck. It is used by machinists, pipefitters, ironworkers, HVAC installers, and general tradespeople who need to bore holes larger than 1 inch with common equipment.

Key Features

• 1-9/64 inch cutting diameter with a 1/2-inch reduced shank for standard chuck compatibility
• High-speed steel construction provides durability across common drilling applications
• 118-degree standard point angle for general-purpose entry on flat and curved workpieces
• Oxide finish reduces friction and provides light surface protection
• 3-inch spiral flute with regular helix for chip evacuation during through-hole drilling
• Right-hand cut for use with conventional drill presses and power drills

Compatibility

Designed as an OEM-style reduced shank drill bit for use in standard 1/2-inch keyed or keyless drill chucks on drill presses and handheld power drills. Suitable for drilling low and medium tensile strength materials.

Installation Notes

Secure the shank fully in a 1/2-inch drill chuck before operation and verify the chuck is tightened to prevent slippage under load. Use appropriate cutting fluid or lubricant when drilling ferrous metals to extend bit life, even though this bit is rated for dry cutting. Wear appropriate eye protection and secure the workpiece before starting the drill. Reduce feed pressure as the point breaks through the exit side of the workpiece to prevent grabbing or bit damage.