Triumph Twist Drill 012515 Jobber Drill Bit 15/64 in Hss

Product Description

The TRIUMPH TWIST DRILL 012515 is a jobber-length twist drill bit designed for high-performance metal drilling in demanding trade and industrial applications. Manufactured from M7 high speed steel with a gold oxide coating, this bit delivers extended tool life and reduced friction during cutting. The 135-degree split point enables self-centering entry without a center punch, minimizing walkout on hard surfaces. With an overall length of 3-7/8 inches and a flute length of 2-5/8 inches, it handles standard depth drilling in alloy and alloy steel workpieces. Licensed machinists, maintenance techs, and fabricators rely on this Series T1HD bit for consistent, repeatable results.

This drill bit is suited for use in ferrous metals including alloy steel, making it a practical choice for mechanical, HVAC fabrication, plumbing rough-in, and general maintenance applications where precision hole placement is required. The straight-cylindrical shank fits standard 3-jaw drill chucks on corded and cordless drills as well as drill presses. The regular spiral flute and tapered web configuration promote efficient chip evacuation and reduce heat buildup during extended drilling cycles.

Key Features

• M7 high speed steel construction for heavy-duty, high-performance cutting
• Gold oxide finish reduces friction and extends bit life compared to uncoated HSS
• 135-degree split point with web thinning provides self-centering, walkout-resistant starts
• Right-hand cut with regular spiral flute for efficient chip clearing
• Straight-cylindrical shank for universal chuck compatibility
• Tapered web configuration for added strength at the cutting edge

Compatibility

Designed as a standard jobber-length drill bit with a 15/64-inch straight-cylindrical shank, compatible with any 3-jaw chuck or drill press capable of accepting bits in the 0.2000 to 0.2500 decimal inch size range.

Installation Notes

Installation is performed by machinists, maintenance technicians, or trade professionals using a standard keyed or keyless 3-jaw chuck. Secure the shank fully in the chuck before operation and verify the workpiece is clamped firmly to prevent movement. Use appropriate cutting fluid or coolant when drilling alloy steel to manage heat and extend bit life. Inspect the cutting edges for wear before each use and replace the bit if chipping or dulling is observed.