Triumph Twist Drill 060411 Screw Machine Drill Bit 11/64

Product Description

The TRIUMPH TWIST DRILL 060411 is a screw machine length drill bit designed for heavy-duty drilling in demanding materials including superalloys. It measures 11/64 inch (0.1719 inches) in diameter with an overall length of 2.125 inches and a flute length of 1.0625 inches. The bit is manufactured from coated high speed steel and features a 135-degree split point for accurate starting without center punching. The straight-cylindrical shank seats securely in standard drill chucks. This bit is suited for use by machinists, maintenance technicians, and trade professionals who require consistent performance in tight-tolerance or high-hardness applications.

This drill bit is built for screw machine length applications where a shorter overall length provides greater rigidity and reduced deflection compared to jobber-length bits. It is commonly used in production drilling, fixture work, and field maintenance on metal assemblies. The T4HD series designation indicates a heavy-duty performance grade, making it appropriate for drilling superalloys, stainless steel, and other tough metals where standard bits wear quickly. The right-hand spiral flute with web-thinned, tapered web geometry promotes efficient chip evacuation and reduces thrust during entry.

Key Features

• 11/64 inch (0.1719 inches) diameter with 135-degree split point for self-centering entry
• Coated high speed steel construction rated for heavy-duty and superalloy drilling
• Screw machine length body (2.125 inches overall) for maximum rigidity and reduced deflection
• Web-thinned tapered web reduces cutting thrust and extends tool life
• Regular spiral flute with 1.0625 inches flute length for efficient chip removal
• Straight-cylindrical shank compatible with standard drill chucks and collets

Compatibility

Designed as a screw machine length replacement drill bit in the T4HD heavy-duty series for use in standard drill chucks and collets accepting straight-cylindrical shanks at 11/64 inch diameter.

Installation Notes

Installation and use should be performed by machinists or qualified trade professionals familiar with metal cutting operations. Secure the shank fully in the chuck and verify runout before drilling. Always wear appropriate eye protection and secure the workpiece before engaging the drill. Follow applicable shop safety standards and equipment manufacturer guidelines for spindle speed and feed rate selection.