Hertel C.E09.1067 Extra Length Drill Bit 0.4200 in Hss

Product Description

The HERTEL C.E09.1067 is an extra length high-speed steel drill bit designed for through-hole and deep-reach drilling applications where standard-length bits cannot reach. Built from high-speed steel with an oxide finish, it provides adequate hardness and surface protection for general-purpose drilling in ferrous and non-ferrous materials. The bit features a 118-degree point angle, a two-flute design, and a decimal diameter of 0.4200 inches. At 10.0 inches overall length with a 7.5-inch flute length, this bit gives machinists, pipefitters, and maintenance techs the reach they need to drill through thick stock, deep cavities, or structural assemblies without repositioning the workpiece.

This drill bit suits general-purpose drilling in metal fabrication, HVAC equipment assembly, plumbing rough-in, and industrial maintenance environments. The extended overall length makes it particularly useful for drilling through deep structural members, stacked sheet metal, or framing where a jobber-length bit would fall short. It is sold individually and is appropriate for use in drill presses, hand drills, and magnetic base drills with compatible chuck sizes.

Key Features

• 0.4200-inch decimal diameter for precision sizing in general-purpose applications
• 118-degree drill point angle suits the widest range of common materials including mild steel and aluminum
• 10.0-inch overall length provides extended reach beyond standard jobber-length bits
• 7.5-inch flute length maximizes chip clearance over the full drilling depth
• Two-flute geometry delivers efficient chip evacuation in deep-hole drilling
• Oxide finish provides basic surface protection and reduces friction during cutting

Compatibility

Designed as a general-purpose extra length drill bit compatible with any 3-jaw chuck or drill press setup capable of accepting a 0.4200-inch shank diameter. Suitable for use in metalworking, HVAC, plumbing, and industrial maintenance drilling operations.

Installation Notes

Extra length drill bits should be installed by a qualified machinist or tradesperson familiar with proper chuck engagement and workpiece securing procedures. Always secure the workpiece firmly in a vise or clamp before drilling to prevent rotation. Reduce feed rate compared to jobber-length bits to minimize deflection and bit breakage over the extended length. Inspect the bit for wear or damage before each use and replace if the cutting edges show signs of chipping or excessive dulling.