Hertel 77428894 Reduced Shank Drill Bit 63/64 in Hss

Product Description

The HERTEL 77428894 is a reduced shank drill bit designed for drilling into low and medium tensile strength materials. It features a 63/64 inch (0.9844 inch) cutting diameter with a 1/2 inch Weldon flat shank, making it compatible with standard chucks and holders that accept reduced shank tooling. Constructed from high-speed steel with an oxide finish, it runs a 118-degree standard point angle and right-hand spiral flutes for efficient chip evacuation. The overall length is 6 inches with a 3 inch flute length, giving technicians adequate reach in typical drilling setups. This bit ships individually and is suited for machine shop, maintenance, and trade fabrication use.

This drill bit is intended for use in low to medium tensile strength workpiece materials such as mild steel, aluminum, and similar metals. The Weldon flat shank with three flats provides positive drive and prevents slipping under torque in compatible tool holders. It is well suited for production drilling, equipment maintenance, and fabrication work where a larger cutting diameter with a reduced 1/2 inch shank is required to fit standard tooling setups.

Key Features

• 63/64 inch cutting diameter (0.9844 inch decimal) for near one-inch hole sizing
• 1/2 inch Weldon flat shank with three flats for positive, slip-resistant drive
• High-speed steel construction for durability across low and medium tensile strength materials
• 118-degree standard point angle for general-purpose drilling
• Oxide finish for basic corrosion and wear resistance
• Right-hand spiral flutes for efficient chip removal during drilling

Compatibility

Designed as an OEM-style replacement or standard-production drill bit for use with 1/2 inch Weldon-style tool holders in drill press, milling machine, and hand-held power tool applications on low and medium tensile strength materials.

Installation Notes

Installation should be performed by a qualified machinist or maintenance technician. Secure the Weldon flat shank firmly in a compatible holder and verify all set screws engage the flats before drilling. Always power down and lock out the machine before changing tooling. Do not use on hardened steels or materials beyond the rated tensile strength of the bit.