Value Collection BDNA--20919-1 Mechanics Drill Bit 23/64 in

Product Description

The VALUE COLLECTION BDNA--20919-1 is a mechanics-length twist drill bit designed for general-purpose hole drilling in metalworking applications. Built from high-speed steel with an oxide finish, it measures 23/64 inches (0.3594 inches decimal) in diameter with a 135-degree split point that self-centers on contact and reduces walking without a center punch. The overall length is 4-3/16 inches, making it well-suited for jobs where a shorter, stiffer bit provides better control and accuracy. The Weldon flat shank with three flats resists slipping in the chuck during heavy-duty drilling operations.

This bit is intended for drilling carbon steel, cast iron, high alloy steel, high tensile strength alloy, stainless steel, and general steel workpieces. The mechanics length profile is a common choice in fabrication shops, maintenance facilities, and field service environments where clearance is limited and bit rigidity matters. It is typically used with a drill press, magnetic base drill, or heavy-duty hand drill. The spiral flute geometry and web-thinned construction promote chip evacuation and reduce thrust force during cutting.

Key Features

• 135-degree split point self-centers on contact, reducing the need for center punching
• Web-thinned parallel web construction lowers cutting resistance and thrust requirements
• Weldon flat shank with three flats prevents chuck slippage under torque
• High-speed steel construction handles a wide range of ferrous workpiece materials
• Oxide finish provides mild corrosion resistance and reduces friction at the cutting edge
• Mechanics length (4-3/16 inches OAL) delivers increased rigidity compared to jobber-length bits

Compatibility

Designed as a general-purpose mechanics-length drill bit compatible with 3-flat Weldon shank drill chucks and holders sized for 23/64 inch shanks, suitable for use on carbon steel, cast iron, high alloy steel, high tensile strength alloy, stainless steel, and standard steel workpieces.

Installation Notes

Installation and use of this bit should be performed by qualified machinists or maintenance technicians familiar with metal drilling operations. Secure the Weldon shank firmly in a compatible chuck or tool holder before operation, ensuring all three flats are properly engaged. Always wear appropriate eye protection and follow applicable workplace safety standards when drilling ferrous materials. Do not exceed the recommended RPM for the bit diameter and workpiece material combination in use.