Hertel C.40W.0278 Taper Length Drill 7/64 Hss

Product Description

The HERTEL C.40W.0278 is a taper length twist drill bit designed for precision drilling in metal, wood, and composite materials. It measures 0.1094 inches (7/64 inch) in diameter with an overall length of 4.625 inches and a flute length of 2.5 inches. Constructed from high-speed steel (HSS) with a black oxide finish, this bit delivers corrosion resistance and reduced friction during cutting. The 118-degree standard point angle suits general-purpose drilling applications. A web-thinned, tapered web design reduces thrust and improves chip evacuation. Machinists, tool-and-die workers, and maintenance technicians are the primary users of this type of drill bit.

The C.40W.0278 is suited for use in drill presses, CNC machines, and hand-held power drills where a taper length bit is needed for deeper reach than a jobber-length drill. The straight-cylindrical shank allows secure clamping in standard three-jaw chucks and collet holders. Right-hand spiral flute geometry clears chips efficiently during through-hole and blind-hole operations in ferrous and non-ferrous metals. This bit is a single-piece, individually packaged unit appropriate for both production and maintenance environments.

Key Features

• HSS construction provides hardness and wear resistance for metal drilling
• Black oxide finish reduces friction and offers mild corrosion protection
• 118-degree standard point angle suits general-purpose drilling across common materials
• Web-thinned tapered web lowers drilling thrust and improves chip flow
• Regular right-hand spiral flute promotes consistent chip evacuation
• Straight-cylindrical shank fits standard chucks and collet systems

Compatibility

Designed as a general-purpose taper length drill bit compatible with standard three-jaw chucks and collet holders that accept a straight-cylindrical shank in the 7/64 inch diameter range.

Installation Notes

Installation and use should be performed by machinists or qualified maintenance personnel. Secure the shank fully in the chuck before operation and verify the spindle speed is appropriate for the material and bit diameter. Wear appropriate eye protection and ensure the workpiece is firmly clamped before drilling. Inspect the cutting edges for wear or damage before each use and replace the bit if chipping or dulling is observed.