Triumph Twist Drill 012657 Wire Size 57 Hss Drill Bit

Product Description

The TRIUMPH TWIST DRILL 012657 is a jobber-length drill bit designed for precision drilling in tight-tolerance applications. Built from M7 high speed steel with a gold oxide coating, it delivers increased lubricity and surface hardness over uncoated HSS tooling. The bit is wire gauge size 57, equivalent to 0.0430 inches in diameter, with a 1.75-inch overall length and a 0.75-inch flute length. A 135-degree split point with web thinning starts on contact without a center punch, reducing walking and improving hole accuracy in thin or hard materials. Machinists, tool-and-die techs, and precision fabricators are the primary users of this series.

This bit is suited for drilling alloy steel, carbon steel, and wood in production or maintenance environments where small-diameter, high-precision holes are required. The T2HD series is a heavy-duty, high-performance line aimed at applications demanding consistent hole quality in harder workpiece materials. The straight-cylindrical shank seats directly in standard drill chucks and collets without adapters, making it compatible with bench drill presses, CNC drill stations, hand drills, and rotary tools that accept the 0.0430-inch shank diameter.

Key Features

• Wire gauge size 57 (0.0430 inches) for fine, precise hole diameters
• M7 high speed steel construction rated for heavy-duty cutting performance
• Gold oxide finish reduces friction and improves heat resistance during drilling
• 135-degree split point with web thinning for self-centering, no-walking starts
• Regular spiral flute with right-hand cut for standard drilling operations
• Tapered web configuration and spiral flute geometry support chip evacuation in deep passes

Compatibility

Designed as an OEM-style jobber-length drill bit compatible with any standard drill chuck or collet accepting a 0.0430-inch straight-cylindrical shank, including bench presses, CNC machines, and hand-held rotary tools.

Installation Notes

Installation and use should be performed by a machinist or qualified technician familiar with small-diameter tooling. Secure the shank fully in the chuck or collet before operation and verify runout before drilling. Power down and de-energize the machine before changing bits. Avoid side-loading or flexing bits of this diameter, as small wire-gauge HSS tooling is susceptible to breakage under lateral stress.