Irwin 1/8″ x 2-1/4″ Left-Hand Cobalt HSS Mechanics Drill Bit (30508)

Description

The Irwin 1/8″ x 2-1/4″ Left-Hand Cobalt HSS Mechanics Drill Bit (30508) is a specialized tool designed to solve the common problem of broken or seized fasteners. Its unique left-hand spiral is engineered to be used in a reverse drill setting, allowing it to drill into the broken fastener and often remove it simultaneously. Made from high-quality M-42 8% cobalt alloy high-speed steel, this bit provides exceptional heat and abrasion resistance, making it an ideal choice for drilling into high-tensile-strength metals, including hardened steel, cast iron, and stainless steel.

KEY FEATURES AND BENEFITS:

• Left-Hand Spiral: This unique design allows the bit to be used in a reverse drilling motion. As it drills into a broken screw or bolt, the counter-clockwise rotation can engage with the fastener and often loosen it, eliminating the need for a separate extractor.
• M-42 8% Cobalt Alloy Steel: This composition provides superior resistance to heat and abrasion. This means the bit can maintain its cutting edge and structural integrity when drilling into extremely hard materials, such as hardened bolts and high-tensile-strength steel, lasting longer than standard HSS bits.
• 135-Degree Split Point: This feature allows for a quick, precise start without the need for a pilot hole or a center punch. It reduces the amount of pressure required to begin drilling, preventing the bit from “walking” or slipping on the material surface.

SPECIFICATIONS:

• Drill Bit Diameter: 1/8″
• Overall Length: 2-1/4″
• Flute Length: 1-1/16″
• Point Angle: 135°
• Material: M-42 8% Cobalt High-Speed Steel (HSS)
• Finish: Gold Oxide

HOW TO USE:

1. Select the appropriate size of the left-hand drill bit, ensuring it is slightly smaller than the broken fastener you intend to remove.
2. Secure the bit into the chuck of your drill, making sure the chuck is tightened firmly.
3. Set your drill to the reverse (counter-clockwise) setting. This is crucial for the left-hand bit to function correctly.
4. Position the tip of the drill bit on the center of the broken fastener.
5. Apply steady, even pressure and begin drilling at a low to medium speed. As the bit drills, the reverse motion will engage with the fastener, often causing it to loosen and unscrew.
6. If the fastener does not unscrew, you have created a pilot hole. You can then proceed with using a screw extractor to complete the removal.

BENEFITS OF USING IRWIN 1/8″ X 2-1/4″ LEFT-HAND COBALT HSS MECHANICS DRILL BIT (30508):

• Increased Efficiency: The left-hand design can often remove a broken fastener without requiring a separate extraction tool, streamlining your workflow and saving time.
• Extended Tool Life: The M-42 8% cobalt steel construction provides a harder and more wear-resistant cutting edge, ensuring the bit lasts longer, even in demanding applications.
• Accurate and Clean Starts: The 135-degree split point prevents the bit from wandering, guaranteeing a precise start for every hole and reducing the risk of damaging the workpiece.
• Versatility in Applications: This bit is effective on a wide range of tough materials, including high-tensile-strength metals, cast iron, and stainless steel, making it a versatile addition to any tool kit.
• Improved Chip Ejection: The heavy-duty spiral flute design efficiently removes chips and debris from the hole, reducing friction and heat buildup, which helps preserve the bit’s sharpness and longevity.

FEATURES:

• M-42 8% cobalt alloy high-speed steel construction
• 135-degree split-point tip for easy, accurate starts
• Heavy-duty spiral flute for efficient chip ejection
• Gold oxide finish for enhanced lubrication
• Shorter cutting lips for reduced torque in hard materials
• Left-hand spiral for reverse drilling and fastener extraction