Triumph Twist Drill 012608 Jobber Drill Bit Wire 8 Hss

Product Description

The TRIUMPH TWIST DRILL 012608 is a jobber-length twist drill bit sized to wire gauge number 8, with a decimal equivalent of 0.1990 inches. Built from M7 high speed steel with a gold oxide coating, it is engineered for heavy-duty, high-performance drilling in metal fabrication and general trade applications. The 135-degree split point reduces walking and allows self-centering entry without a center punch. A web-thinned, tapered web configuration reduces thrust requirements on entry. At 3.625 inches overall length with a 2.4375-inch flute, it fits standard jobber-length drill chucks. Machinists, pipefitters, ironworkers, and maintenance techs keep this size on hand for everyday ferrous and non-ferrous drilling tasks.

This drill bit is suited for drilling alloy steel, carbon steel, and wood in both shop and field environments. The right-hand spiral flute evacuates chips efficiently during through-hole and blind-hole drilling. The straight cylindrical shank seats cleanly in keyed or keyless chucks. The T2HD series designation indicates a heavy-duty jobber line intended for production and repetitive drilling cycles where bit longevity and point integrity matter. It is sold individually but requires a minimum order of 12 units per order.

Key Features

• Wire gauge size 8, decimal equivalent 0.1990 inches for precision sizing
• M7 high speed steel construction for heat and wear resistance
• Gold oxide finish reduces friction and provides light corrosion resistance
• 135-degree split point with web thinning for self-centering entry and reduced thrust
• Right-hand regular spiral flute for efficient chip evacuation
• Straight cylindrical shank compatible with standard drill chucks

Compatibility

Designed as a jobber-length replacement drill bit for use in standard keyed or keyless drill chucks accepting a 0.1990-inch straight cylindrical shank, suitable for benchtop drill presses, handheld power drills, and CNC drilling operations.

Installation Notes

Install and remove drill bits only when the drill press or power tool is fully powered down and the chuck is stationary. Secure the workpiece before drilling to prevent rotation or kickback. Use appropriate cutting fluid when drilling hard ferrous alloys to extend bit life and manage heat buildup. Inspect the split point and cutting edges before each use and replace bits that show chipping, dulling, or point deformation.