Triumph Twist Drill 012718 Jobber Drill Bit 0.339 in

Product Description

The TRIUMPH TWIST DRILL 012718 is a jobber-length drill bit designed for high-performance drilling in metal and alloy applications. Built from M7 high speed steel with a gold oxide coating, this bit delivers heat resistance and extended tool life under demanding conditions. It features a 135-degree split point for self-centering entry without a center punch, reducing walking on hard or slick surfaces. The spiral flute design promotes chip evacuation, and the right-hand cut configuration suits standard drill presses and hand drills. Machinists, fabricators, and maintenance trades rely on this bit for production and repair work in alloy steel, carbon steel, and similar materials.

This drill bit is sized at 0.339 inches in diameter and falls within the 0.3000 to 0.3500 inch range of the T3HD series. It is suited for drilling alloy steel, carbon steel, and similar ferrous workpiece materials in both shop and field environments. The straight-cylindrical shank fits standard drill chucks without adapters, making it practical for a wide range of equipment. It is intended for trade and industrial use where consistent hole quality and bit durability are priorities.

Key Features

• M7 high speed steel construction rated for heavy-duty drilling applications
• Gold oxide finish improves lubricity and reduces heat buildup during cutting
• 135-degree split point with web thinning enables self-centering entry on hard materials
• Right-hand spiral flute with regular helix promotes efficient chip removal
• Straight-cylindrical shank fits standard drill chucks without modification
• Tapered web configuration adds rigidity and reduces deflection

Compatibility

Designed for use with alloy steel, alloy, and carbon workpiece materials as part of the TRIUMPH TWIST DRILL T3HD heavy-duty jobber series. No coolant-through capability; use with external cutting fluid where required by the application.

Installation Notes

Install the shank fully into the drill chuck and tighten securely before operation. Verify spindle speed is appropriate for the workpiece material and bit diameter before starting the cut. Apply a suitable cutting fluid to the workpiece surface to extend bit life and improve hole finish when drilling ferrous metals. Inspect the cutting edges for wear or chipping before each use and replace if the point geometry is compromised.