Triumph Twist Drill 094145 Reduced Shank Drill Bit

Product Description

The TRIUMPH TWIST DRILL 094145 is a reduced shank drill bit designed for drilling operations that require a larger cutting diameter than a standard shank will accommodate. The bit features a 45/64 inch (0.7031 inch) cutting diameter paired with a 1/2 inch Weldon shank, allowing it to seat securely in standard 1/2 inch chucks and end mill holders without slipping under torque. Built from high speed steel with a coated finish, the 094145 delivers reliable wear resistance across a range of workpiece materials. The split point geometry and right-hand spiral flute promote accurate entry and efficient chip evacuation throughout the cut. Overall length is 6 inches with a maximum drilling depth of 3 inches.

This bit is suited for metalworking, fabrication, and maintenance applications in industrial, commercial, and trade shop environments. The Weldon shank with three flats is the preferred configuration when using end mill holders or set-screw-style tool holders, making this bit a practical choice for drill press and milling machine setups where rotational slippage is a concern. It is sold individually and is appropriate for professionals who need a reliable reduced shank bit for production or repair drilling in steel, aluminum, and similar materials.

Key Features

• 45/64 inch cutting diameter (0.7031 inch decimal equivalent) on a 1/2 inch reduced Weldon shank
• Split point tip for self-centering entry and reduced walking on start
• 118-degree drill point angle suitable for general-purpose metal drilling
• Three-flat Weldon shank prevents rotation in set-screw tool holders
• Right-hand cut with regular spiral flute for standard chip evacuation
• Coated finish on high speed steel body for added surface hardness and wear life

Compatibility

Designed for use with 1/2 inch Weldon-style end mill holders and set-screw chucks on drill presses and milling machines. No specific OEM system compatibility was provided by the manufacturer for this part.

Installation Notes

Installation is performed by machinists, tool-and-die professionals, and maintenance technicians. Before mounting, ensure the spindle is fully de-energized and the chuck or holder is clean and free of debris. Seat the Weldon shank fully into the holder and tighten set screws against the flats evenly before operation. Do not exceed the recommended maximum drilling depth of 3 inches, and use appropriate cutting fluid for the workpiece material to maintain bit life.