Irwin 73127 Turbomax High Speed Steel Jobber Length Drill Bit, Self-Centering Straight Shank

Irwin 73127 Turbomax High Speed Steel Jobber Length Drill Bit, Self-Centering Straight Shank

The Irwin 73127 Turbomax High Speed Steel Jobber Length Drill Bit is engineered for high-performance metal drilling in portable drill applications, including work on curved surfaces where conventional bits tend to skate or walk. This family of jobber length bits is available in 1/2", 7/16", and 27/64" sizes, with every size manufactured from high speed steel and finished with a distinctive black body and gold flute along with a straight shank for use in standard portable drill chucks. Each size in the lineup shares Irwin's self-centering Turbomax tip for clean entry and fast starts, along with tip geometry engineered to stay sharper longer and drill up to 10x faster than other leading drill bits, helping reduce downtime for professionals and serious DIYers working through steel, aluminum, and other common metals. Across the 27/64" through 1/2" size range, a three-flatted shank improves grip in portable drill chucks, minimizing slippage and lost torque during extended drilling sessions.

Key Features

• Available Sizes: This Turbomax family is offered in 1/2", 7/16", and 27/64" jobber length sizes to match a range of portable drill metal-drilling tasks.
• High Speed Steel Construction: Black body and gold flute high speed steel resists heat buildup and holds a durable cutting edge through repeated metal drilling.
• Self-Centering Turbomax Tip: The revolutionary Turbomax tip is self-centering for clean entry and fast starts, stays sharper longer, and drills up to 10x faster than other leading drill bits.
• Straight Shank Design: A straight shank fits standard portable drill chucks for quick, secure bit changes across every size in the family.
• Three-Flatted Shank Grip: On sizes 3/16" and above — which includes every size offered in this family — a three-flatted shank improves chuck grip and reduces slippage under load.
• Jobber Length Sizing: Jobber length construction suits general-purpose metal drilling applications across the full 27/64" to 1/2" range.
• Curved Surface Performance: The self-centering tip design helps the bit perform well on curved surfaces, reducing bit walk during startup.

Technical Specifications

• Refer to manufacturer documentation for complete technical specifications.

Typical Applications

• Portable Drill Metal Drilling
• Curved Surface and Rounded Workpiece Drilling
• General Metal Fabrication
• Maintenance, Repair, and Retrofit Work
• Steel and Aluminum Drilling Tasks
• Professional Trade and DIY Metalworking

Why Irwin?

Irwin developed the Turbomax platform around a self-centering tip geometry and high speed steel construction to keep bits cutting cleanly through demanding metal drilling jobs without walking or dulling prematurely. The black body and gold flute finish mark Irwin's dedicated high speed steel formulation, while the three-flatted shank on 3/16" and above sizes — covering the full 27/64", 7/16", and 1/2" lineup — locks securely into portable drill chucks for a slip-resistant grip. Built for professionals and serious DIYers, the Irwin Turbomax Jobber Length Drill Bit family is engineered to deliver faster starts, longer-lasting sharpness, and reliable performance across everyday metal drilling applications.