Triumph Twist Drill 011516 Cobalt Drill Bit 1/4 in

Product Description

The TRIUMPH TWIST DRILL 011516 is a cobalt jobber length drill bit engineered for heavy-duty drilling in tough materials. The 1/4-inch diameter bit features a 135-degree split point that self-centers on contact, reducing the need for a center punch and minimizing walking on hard surfaces. A gold oxide coating improves surface hardness and lubricity. The regular spiral flute and right-hand cut design deliver efficient chip evacuation during extended drilling operations. This bit is well suited for machinists, fabricators, maintenance technicians, and trade professionals who regularly drill into high-strength or abrasive materials.

This drill bit is designed for use in alloy and alloy steel workpieces where standard HSS bits wear prematurely. The 4-inch overall length and 2-3/4-inch flute length make it appropriate for standard jobber-depth holes in bench drill presses, hand drills, and drill stations. The straight-cylindrical shank fits standard three-jaw chucks without adapters. It is part of the T1C series, positioned as a high-performance option for repetitive or production drilling tasks where bit longevity and hole quality matter.

Key Features

• Cobalt construction for improved heat resistance and wear life in hard metals
• 135-degree split point with web thinning for self-centering entry and reduced thrust
• Gold oxide coating enhances lubricity and surface durability
• Regular spiral flute with right-hand cut for consistent chip removal
• Straight-cylindrical shank fits standard drill chucks without modification
• T1C series heavy-duty grade rated for alloy and alloy steel applications

Compatibility

Designed for use in standard three-jaw drill chucks accepting a 1/4-inch straight-cylindrical shank. Intended primary workpiece materials are alloy and alloy steel. Coolant-through operation is not supported with this bit.

Installation Notes

Installation and use should follow standard machine shop or field drilling safety practices. Secure the workpiece firmly before drilling and ensure the chuck is fully tightened on the shank. Use appropriate cutting fluid or lubricant when drilling alloy steel to extend bit life and improve hole finish. Inspect the cutting edges before each use and replace the bit if chipping or excessive wear is observed.