Hertel C.40W.0357 Taper Length Drill 9/64 Hss

Product Description

The HERTEL C.40W.0357 is a taper length twist drill bit designed for precision hole-making in metal, steel, and similar materials. It measures 0.1406 inches (9/64 inch) in diameter with a 118-degree standard point angle and is manufactured from high-speed steel (HSS) with a black oxide finish. The black oxide coating reduces friction and provides light corrosion resistance during use. At 5.375 inches overall length with a 3.0 inch flute length, this taper length drill reaches deeper than a jobber-length bit, making it suitable for applications where additional reach is required. It is a right-hand cut, spiral flute design with a web-thinned, tapered web configuration for easier starting and reduced thrust.

This drill bit is used in metalworking, maintenance, and fabrication environments. The taper length format is commonly selected when standard jobber-length bits cannot reach the workpiece or when drilling through thicker stock. It is suitable for use in drill presses, CNC machining centers, and hand-held power drills with appropriate collets or chucks. Typical users include machinists, millwrights, and maintenance technicians working on ferrous and non-ferrous metals. The straight-cylindrical shank seats directly in standard drill chucks without adapters.

Key Features

• 0.1406 inch (9/64 inch) diameter with straight-cylindrical shank for standard chuck mounting
• 118-degree standard point angle with web-thinned geometry for reduced entry thrust
• 3.0 inch flute length provides extended reach compared to jobber-length equivalents
• HSS construction maintains hardness and edge retention at elevated cutting temperatures
• Black oxide finish reduces friction and provides light corrosion protection
• Right-hand cut, regular spiral flute for consistent chip evacuation

Compatibility

Designed as a standard taper length drill bit with a straight-cylindrical shank, compatible with any drill chuck or collet accepting a 9/64 inch shank diameter.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance technicians familiar with cutting tool practices. Secure the shank fully in the chuck and verify runout before drilling. Always wear appropriate eye protection and secure the workpiece before beginning the cut. Do not exceed the recommended speed and feed range for the material being drilled; consult published HSS cutting speed tables for the specific workpiece material.