Hertel F.901.2778 Reduced Shank Drill Bit 1.0938 in Hss

Product Description

The HERTEL F.901.2778 is a reduced shank twist drill bit designed for drilling through metal, plastic, and general-purpose materials where a standard full-shank bit would exceed the chuck capacity of the machine. The bit measures 1.0938 inches in diameter with a 3/4-inch straight-cylindrical shank, allowing it to seat in standard drill chucks and milling machine spindles. It carries a 118-degree split point angle suited for general-purpose work and is manufactured from high-speed steel with an oxide finish that provides mild corrosion resistance and reduces friction during the cut. Flute length is 3 inches with a total overall length of 6 inches.

This bit is used in machine shop, maintenance, and fabrication environments where holes larger than 3/4 inch must be bored without a large-capacity chuck. Typical applications include drilling clearance holes, bolt holes, and through-holes in mild steel, aluminum, cast iron, and thermoplastics. The reduced shank design makes it compatible with standard 3/4-inch drill chucks on drill presses, lathes, and knee mills. It is suited for production and maintenance machinists working on structural, mechanical, and industrial assembly tasks.

Key Features

• 1.0938-inch (1-3/32 inch) cutting diameter for large-hole applications
• 3/4-inch straight-cylindrical reduced shank fits standard drill chucks
• 118-degree point angle for general-purpose drilling across common materials
• High-speed steel construction maintains hardness at elevated cutting temperatures
• Oxide finish reduces surface friction and provides mild corrosion resistance
• 3-inch flute length supports a maximum drilling depth of 3 inches

Compatibility

Designed as a general-purpose reduced shank drill bit compatible with drill presses, lathes, and milling machines equipped with a 3/4-inch drill chuck or collet.

Installation Notes

Installation is performed by machinists or maintenance technicians using standard machine tooling practices. Secure the shank fully in the chuck and verify runout before drilling. Always power down and lock out the machine before changing bits. Use appropriate cutting fluid for the workpiece material to extend tool life and maintain hole quality.