Import -20923-5 Mechanics Drill Bit 27/64 in Hss

Product Description

The IMPORT -20923-5 is a mechanics-length drill bit designed for general-purpose drilling in ferrous metals and high-strength materials. Built from high-speed steel with an oxide finish, this bit features a 135-degree split point that reduces walking and allows drilling to start without a center punch. The Weldon flat shank with three flats locks securely in compatible chucks to prevent slippage under torque. At 4-7/16 inches overall length, the mechanics length keeps the bit rigid and well-suited for close-quarters work in machine shops and fabrication environments.

This drill bit is intended for use in metal drilling applications including carbon steel, cast iron, high alloy steel, high tensile strength alloy, stainless steel, and general steel workpieces. The spiral flute geometry with a regular spiral and parallel web configuration promotes chip evacuation during drilling. Web thinning reduces feed force requirements, making the bit appropriate for both hand-held drill motors and drill press operations in production or maintenance environments. Machinists, millwrights, and maintenance mechanics are the primary users of this bit size and length.

Key Features

• 27/64 inch diameter (0.4219 inch decimal equivalent) for precise sizing
• 135-degree split point reduces center-punch requirements and minimizes walking on startup
• High-speed steel construction handles carbon steel, cast iron, stainless steel, and high alloy steel
• Weldon flat shank with 3 flats prevents rotation in compatible set-screw chucks
• Oxide coating provides mild lubricity and corrosion resistance during storage
• Web-thinned tip reduces thrust force and extends cutting life in demanding materials

Compatibility

Designed as a general-purpose mechanics-length drill bit compatible with Weldon flat shank drill chucks and holders. Suitable for use in drill presses, milling machines, and hand-held drill motors equipped with set-screw style tool holders accepting the appropriate shank diameter.

Installation Notes

This bit is installed by a machinist or maintenance mechanic using a compatible Weldon flat shank chuck or tool holder. Ensure the set screws engage the flats fully before applying cutting load. Secure the workpiece before drilling and use appropriate cutting fluid for stainless steel or high alloy materials to manage heat buildup. Inspect the cutting edges for wear or chipping before each use and replace if the point geometry is compromised.