Triumph Twist Drill 012529 Jobber Drill Bit 29/64 Inch Hss

Product Description

The TRIUMPH TWIST DRILL 012529 is a jobber-length drill bit designed for high-performance drilling in alloy and alloy steel workpieces. Built from M7 grade high speed steel with a gold oxide coating, it delivers extended tool life in demanding production and maintenance environments. The split point tip at 135 degrees reduces walking and allows self-centering entry without a pilot hole. The right-hand spiral flute clears chips efficiently throughout the cut. This bit is used by machinists, millwrights, and maintenance technicians working with ferrous metals in shop or field settings.

The 012529 fits standard jobber-length applications where a 29/64 inch diameter straight-cylindrical shank bit is required. The T1HD series targets heavy-duty drilling tasks in alloy steel and similar ferrous materials. With a flute length of 4-3/16 inches and an overall length of 5-5/8 inches, it works in benchtop drill presses, magnetic base drills, and handheld power drills equipped with a 1/2 inch or larger chuck. The tapered web and web-thinned geometry reduce thrust force and improve hole quality in harder stock.

Key Features

• M7 high speed steel construction rated for heavy-duty drilling in alloy steel
• 135-degree split point for self-centering entry and reduced walking
• Gold oxide finish improves lubricity and corrosion resistance during cutting
• Web-thinned, tapered web geometry reduces thrust and extends bit life
• Right-hand regular spiral flute for efficient chip evacuation
• Straight-cylindrical shank fits standard drill chucks without adapters

Compatibility

Designed as a direct-fit jobber-length drill bit for use in any 1/2 inch or larger drill chuck accepting a straight-cylindrical shank; sized at 29/64 inch (0.4531 inch decimal) within the 0.4000 to 0.5000 inch drill bit size range of the T1HD series.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance technicians familiar with proper drilling procedures. Secure the workpiece firmly before drilling and confirm the chuck is tightened on the full shank diameter. Apply appropriate cutting fluid when drilling alloy steel to manage heat buildup and extend bit life. Do not exceed the rated speed range for the bit diameter and material being drilled.