Hertel C.E09.1191 Extra Length Drill Bit 0.4688 in Hss

Product Description

The HERTEL C.E09.1191 is a high-speed steel extra length drill bit designed for drilling applications that require extended reach beyond standard drill bit lengths. With a 0.4688-inch diameter and a 118-degree drill point angle, this bit is suited for general-purpose drilling through metal, wood, and similar materials. The oxide finish provides a base level of lubricity and surface protection during cutting. At 10 inches overall length with a 7.5-inch flute length, it gives tradespeople the reach needed for deep-hole work in fabrication, HVAC brackets, equipment frames, and structural components.

This extra length drill bit is used in applications where a standard-length bit cannot reach the work surface, such as drilling through deep stock, tight mechanical assemblies, or structural members during equipment installation. It is appropriate for use in metal fabrication shops, HVAC equipment assembly, plumbing rough-in, and general industrial maintenance. The two-flute design promotes chip evacuation during deep drilling passes.

Key Features

• 0.4688-inch diameter for precise hole sizing in general-purpose applications
• 118-degree drill point angle suited for flat-bottom entry on metals and similar materials
• 10-inch overall length provides extended reach for deep or obstructed drilling
• 7.5-inch flute length supports efficient chip evacuation during deep-hole passes
• High-speed steel construction withstands heat generated during metal drilling
• Oxide finish adds surface protection and reduces friction at the cutting edge

Compatibility

Designed as a general-purpose extra length drill bit compatible with standard drill chucks accepting a 0.4688-inch shank, suitable for use in hand drills, drill presses, and milling machine setups across industrial and trade applications.

Installation Notes

Extra length drill bits should be installed and operated by qualified tradespeople familiar with drilling equipment and safe machining practices. Secure the workpiece firmly before drilling and use appropriate cutting fluid when working through ferrous metals to extend bit life and reduce heat buildup. Inspect the drill point and flutes for wear or damage before each use, and replace the bit if the cutting edges are chipped or the flutes are clogged. Reduce feed pressure when the full flute length is engaged to prevent bit deflection or breakage.