Hertel F.924.3096 Reduced Shank Drill Bit 1.2188 in Cobalt

Product Description

The HERTEL F.924.3096 is a reduced shank cobalt drill bit sized at 1.2188 inches (1-7/32 inch) in diameter with a 3/4-inch straight-cylindrical shank. The 135-degree split point reduces walking and cutting force at entry, making it well suited for harder steels and tough alloys. A straw finish indicates the cobalt content is distributed throughout the steel, not just applied as a surface coating. The flute length runs 3 inches with an overall length of 6 inches, keeping the bit rigid during deep-hole operations. This tool is intended for professional machinists, maintenance mechanics, and trade technicians working with ferrous and non-ferrous materials.

This bit is built for general-purpose drilling in production and maintenance environments. The reduced shank design allows it to fit a standard 3/4-inch drill chuck despite the large 1.2188-inch cutting diameter, which is useful when a larger chuck or Morse taper setup is not available. Maximum recommended drilling depth is 3 inches. Typical applications include drilling oversized clearance holes, step drilling in steel plate, and fabrication work in HVAC, plumbing, and electrical trades where large-diameter holes are required in structural or equipment steel.

Key Features

• Cobalt tool steel construction for heat resistance and extended tool life in hard materials
• 135-degree split point for reduced entry walking and lower thrust requirements
• Reduced 3/4-inch straight-cylindrical shank fits standard 3/4-inch drill chucks
• Straw finish indicates through-steel cobalt composition, not a surface coat
• 3-inch flute length supports a maximum drilling depth of 3 inches
• 6-inch overall length provides clearance in tight fixture setups

Compatibility

Designed as a general-purpose reduced shank drill bit compatible with any drill press, magnetic drill, or hand drill equipped with a 3/4-inch capacity chuck.

Installation Notes

Installation of this bit should be performed by a qualified machinist or trained technician. Always power down and lock out the drill or drill press before installing or removing the bit. Secure the shank fully within the chuck jaws and tighten with a chuck key before starting the spindle. Use cutting fluid appropriate for the workpiece material to manage heat buildup when drilling ferrous metals at this diameter.