Hertel 77428597 Reduced Shank Drill Bit 17/32 in Hss

Product Description

The HERTEL 77428597 is a reduced shank twist drill bit designed for drilling into low and medium tensile strength materials. It features a 17/32 inch cutting diameter paired with a 1/2 inch Weldon flat shank, allowing it to seat securely in standard 1/2 inch chucks and milling-style holders. The bit is manufactured from high-speed steel (HSS) with an oxide finish that provides basic lubricity and corrosion resistance during drilling operations. A 118-degree standard point angle makes this bit well suited for general-purpose drilling in shops and fabrication environments where consistent, repeatable hole entry is required.

This drill bit is used in machine shop, fabrication, and maintenance applications where a reduced shank allows a larger cutting diameter to be held in a standard 1/2 inch capacity chuck. The Weldon flat shank with three flats resists slippage under torque, making it appropriate for use in drill presses, milling machines, and CNC setups. It is suited for drilling carbon steel, mild steel, aluminum, and similar low to medium tensile strength workpiece materials in both production and job-shop settings.

Key Features

• 17/32 inch cutting diameter with a 1/2 inch reduced Weldon flat shank for use in standard chucks
• High-speed steel construction provides durability across general-purpose drilling applications
• 118-degree standard point angle for reliable hole entry on flat and slightly curved surfaces
• 3-inch flute length supports a maximum drilling depth of 3 inches
• Right-hand spiral flute with regular helix promotes efficient chip evacuation
• Oxide finish adds surface lubricity and basic protection against corrosion

Compatibility

Designed for use with 1/2 inch capacity drill chucks, milling machine collets, and holders that accept Weldon flat shanks in drill press and CNC drilling applications on low and medium tensile strength materials.

Installation Notes

Installation and operation should be performed by a qualified machinist or tooling technician familiar with rotary cutting tools. Ensure the machine spindle is fully stopped and locked out before inserting or removing the bit from its holder. Confirm the Weldon flat is properly aligned with the set screw in the holder and tighten securely to prevent slippage under load. Always verify workpiece clamping and machine speed settings are appropriate for the material and bit diameter before beginning the cut.