Irwin 15/64″ x 3-7/8″ Cobalt HSS 135 Degree Drill Bit (63115)

The Irwin 15/64″ x 3-7/8″ Cobalt HSS 135 Degree Drill Bit (63115) is a high-performance cutting tool engineered for precision and longevity in demanding applications. Crafted from M35 High-Speed Steel with a significant cobalt alloy content, this drill bit is built to withstand extreme heat and abrasion, making it the ideal choice for drilling into tough materials such as stainless steel, hard steel, and various abrasive alloys. The 135-degree split-point tip is a key feature, as it allows for immediate, accurate hole starts without the need for a pilot hole, significantly reducing the chance of the bit “walking” or skidding across the surface. Its robust, heavy-duty web construction provides enhanced strength, while the advanced spiral flute design ensures rapid and efficient chip ejection to prevent overheating. Whether you’re a professional tradesperson or a serious DIYer, this jobber-length drill bit delivers consistent, reliable results and is designed to provide a longer service life even under tough conditions. Each purchase includes one individually packaged Irwin 15/64″ Cobalt HSS Drill Bit.KEY FEATURES AND BENEFITS: Exceptional Material Composition: Made from M35 High-Speed Steel with a minimum of 5% cobalt, this bit offers superior heat and abrasion resistance for prolonged tool life when drilling into hard metals. Precision Drilling: The 135-degree split-point tip enables fast, accurate starts on contact, eliminating the need for a center punch and reducing walking. Reduced Drilling Pressure: The split-point design lowers the feed pressure required to penetrate materials, making drilling easier and more controlled. Efficient Chip Management: The optimized spiral flute geometry quickly evacuates chips and debris, preventing clogging and keeping the bit and workpiece cool. Increased Strength: Heavy-duty web construction provides additional rigidity and stability, preventing breakage and ensuring smooth operation even in high-stress situations.SPECIFICATIONS: Size: 15/64″ Overall Length: 3-7/8″ Flute Length: 2-5/8″ Material: M35 High-Speed Steel with cobalt alloy Point Angle: 135-degree split point Shank Style: Straight Hand Style: Right-hand cut Finish: Gold Oxide Inclusions: One Irwin 15/64″ Cobalt HSS Drill Bit (63115)HOW TO USE: Preparation: Ensure your drill is securely plugged in or has a charged battery. Choose the appropriate safety gear, including eye protection. Secure your workpiece firmly in a vise or with clamps to prevent it from moving. Installation: Insert the drill bit into the drill’s chuck, making sure it is fully seated. Tighten the chuck securely around the bit to prevent it from slipping during use. Positioning: Place the tip of the drill bit directly on the mark where you want the hole to be. The 135-degree split point will help it stay in place. Drilling: Begin drilling at a low to medium speed, applying steady, even pressure. Allow the bit to do the cutting; excessive force can cause the bit to overheat or break. Cooling and Clearing: For harder materials, intermittently stop drilling to allow the bit and material to cool. You can also apply cutting fluid to prolong the bit’s life and improve performance. Pull the bit out of the hole periodically to clear chips and debris. Finishing: Once you have drilled through the material, retract the drill bit while it is still spinning to prevent it from binding.BENEFITS OF USING IRWIN 15/64″ X 3-7/8″ COBALT HSS 135 DEGREE DRILL BIT (63115): This specialized drill bit provides a reliable solution for difficult drilling tasks. Its cobalt-infused steel composition means it can handle the intense heat generated when working with hard metals, leading to less frequent bit changes and increased productivity. The precise split-point tip saves time by eliminating the need for pre-drilling or punching, ensuring that every hole starts exactly where you want it. Its heavy-duty construction means it can withstand the stress of professional use, delivering a longer operational life compared to standard HSS bits. This drill bit is an investment in efficiency, accuracy, and durability for any project involving challenging materials.FEATURES: Right-hand cut for standard rotation. Straight shank is compatible with most standard drill chucks. Jobber length provides a balance of reach and stability. Gold oxide finish provides a layer of lubrication and corrosion resistance. Designed to withstand higher temperatures without losing its hardness.