Triumph Twist Drill 011529 Cobalt Drill Bit 29/64 in

Product Description

The TRIUMPH TWIST DRILL 011529 is a cobalt jobber length drill bit designed for demanding metal drilling applications in industrial and trade environments. Built from cobalt steel with a gold oxide coating, this bit runs at 29/64 inch (0.4531 inch) diameter with a 135-degree split point that self-centers on contact and reduces walking without a center punch. The spiral flute geometry and web-thinned, tapered web configuration promote efficient chip evacuation. Machinists, maintenance technicians, and fabricators working with alloy steel and hard metals will find this bit suited to heavy-duty production drilling.

The 011529 is engineered for right-hand cutting in alloy and alloy steel workpieces. At 5-5/8 inches overall length with a 4-3/16 inch flute length and a straight-cylindrical shank measuring 29/64 inch, it fits standard drill chucks without modification. The Series T1C designation places it in a high-performance cobalt line intended for high-heat applications where high-speed steel bits lose their edge. Typical use cases include structural fabrication shops, maintenance and repair operations, and production machining where consistent hole quality in hard materials is required.

Key Features

• Cobalt construction with gold oxide coating for extended tool life in hard metals
• 135-degree split point with self-centering geometry reduces drill walking
• Web-thinned, tapered web lowers thrust requirements and improves chip flow
• Right-hand spiral flute with regular helix for efficient chip evacuation
• Straight-cylindrical shank fits standard three-jaw drill chucks
• Heavy-duty grade rated for alloy and alloy steel workpieces

Compatibility

Designed for use in standard drill chucks accepting a 29/64 inch straight-cylindrical shank. Optimized for drilling alloy steel and alloy workpiece materials in high-performance applications.

Installation Notes

Install in a drill press, milling machine, or hand drill with a chuck rated for the 29/64 inch shank diameter. Secure the shank fully in the chuck and verify runout before beginning a cut. Use appropriate cutting fluid for alloy steel to manage heat buildup and extend bit life. Wear eye protection and secure the workpiece before drilling.