Hertel C.E11.0992 Extra Length Drill Bit 0.3906 in Hss

Product Description

The HERTEL C.E11.0992 is an extra length high-speed steel drill bit designed for deep-hole drilling applications where a standard-length bit cannot reach. Built from general-purpose high-speed steel with an oxide finish, this bit features a 118-degree point angle suited to a wide range of common materials including mild steel, aluminum, and plastics. The 12-inch flute length provides chip clearance over extended cuts, while the 18-inch overall length allows machinists and fabricators to reach into deep cavities, long workpieces, or through thick structural members that standard bits cannot access.

This drill bit is appropriate for use in machine shops, fabrication facilities, and on-site metalworking applications where extended reach is required. The 0.3906-inch diameter corresponds to a 25/64-inch size, commonly used in structural, mechanical, and general manufacturing work. It is installed in drill presses, milling machines, or hand-held power drills with compatible chucks. The oxide finish provides light corrosion resistance during storage and moderate lubricity during cutting operations.

Key Features

• Extra length design at 18 inches overall length for deep-hole drilling applications
• 12-inch flute length promotes chip evacuation over extended cuts
• 118-degree point angle suitable for general-purpose drilling in a variety of common materials
• High-speed steel construction for durability and re-sharpenability
• Oxide finish provides light corrosion resistance and surface lubricity
• Two-flute geometry for standard chip clearance and drill point stability

Compatibility

Designed as a general-purpose extra length drill bit compatible with standard drill chucks and collets accepting a 0.3906-inch shank diameter, suitable for use in drill presses, CNC machines, and hand-held power drilling equipment.

Installation Notes

Installation and use of this bit should be performed by qualified machinists or tradespeople familiar with drilling operations and appropriate speeds and feeds for the material being worked. Secure the workpiece firmly before drilling and ensure the chuck is tightened properly to prevent slippage on the extended shank. Use cutting fluid or coolant when drilling metals to extend bit life and improve cut quality. Inspect the cutting edges before use and do not force a dull or damaged bit.