Irwin 13/32″ x 4-3/8″ Left-Hand Cobalt HSS Mech Drill Bit (30526ZR)

Description

The Irwin 13/32″ x 4-3/8″ Left-Hand Cobalt HSS Mech Drill Bit (30526ZR) is a specialty tool designed for the specific and often challenging task of removing broken fasteners. Engineered for professionals and serious DIY enthusiasts, this drill bit is not a standard drilling tool but a precision instrument for extraction. Its unique left-hand cut and premium M-42 cobalt alloy construction make it an indispensable part of any mechanic’s or tradesperson’s toolkit when dealing with snapped bolts, screws, or studs.

KEY FEATURES AND BENEFITS:

• Specialized Left-Hand Cut: The bit’s reverse spiral design drills in a counter-clockwise direction. This functionality is crucial for extraction, as it applies a loosening force to the broken fastener while drilling, often causing it to unscrew itself.
• M-42 Cobalt HSS Construction: Made from high-speed steel with an 8% cobalt alloy, this bit offers superior heat and abrasion resistance. This allows it to maintain its hardness and cutting edge even when drilling through tough or hardened metals.
• 135° Split Point Tip: This advanced tip design ensures the bit starts drilling on contact without walking or skating on the material surface. It eliminates the need for a center punch and allows for accurate, clean entry, which is vital when working with a small, broken fastener.
• Mechanics Length Design: The shorter overall length and flute length provide increased rigidity and stability. This design minimizes the risk of bit breakage, particularly in high-torque applications.

SPECIFICATIONS:

• Diameter: 13/32″
• Overall Length: 4-3/8″
• Flute Length: 2-1/2″
• Point Angle: 135°
• Material: M-42 High-Speed Steel with 8% Cobalt
• Hand of Cut: Left-Hand
• Shank Type: Straight

HOW TO USE:

• Preparation: Ensure the broken fastener’s surface is clean and as flat as possible. If the surface is uneven, you may need to file or grind it to create a stable starting point for the drill bit.
• Lubrication: Apply a suitable cutting fluid or lubricant to the work area. This helps to reduce heat, friction, and prolong the life of the drill bit.
• Setup: Secure the Irwin 13/32″ Left-Hand Cobalt HSS Drill Bit firmly in a reversible drill. Ensure the drill is set to the reverse (counter-clockwise) setting. This is a critical step for the bit to work as intended.
• Drilling: Apply consistent, firm pressure and a slow, steady speed to begin drilling. Allow the bit to do the work and avoid excessive force. As the bit drills, its reverse action may catch the broken fastener and begin to unscrew it.
• Extraction: If the fastener begins to turn, continue drilling slowly until it is fully extracted. If the fastener remains in place, a screw extractor may be required, for which this bit has prepared a hole.

BENEFITS OF USING IRWIN 13/32″ X 4-3/8″ LEFT-HAND COBALT HSS MECH DRILL BIT (30526ZR):

• Time-Saving Extraction: Its left-hand design can often extract a broken fastener in a single step, saving significant time and effort compared to traditional extraction methods.
• High-Heat Performance: The M-42 cobalt steel allows for drilling into tough materials without losing its edge, providing reliability in demanding situations.
• Precise Starting: The 135° split point design ensures accurate hole placement, reducing the chance of slipping and damaging the surrounding material.
• Increased Tool Life: The combination of cobalt material and a sturdy, compact design provides a long-lasting and dependable tool for repeated use in professional environments.

FEATURES:

• Heavy-duty spiral flutes for efficient chip evacuation.
• Straight shank for compatibility with standard drill chucks.
• Precision-ground for optimal cutting geometry and performance.
• Resistant to high temperatures and abrasion.
• Purpose-built for removing broken fasteners during extraction tasks.
• Compact mechanics length offers superior control and reduced flex during drilling.