39 #SCREW MACHINE - KnKut

The KnKut KK7-39 #39 Screw Machine Drill is engineered for professional technicians and mechanics who require precision and durability in demanding automotive and industrial environments. This robust drill bit is specifically designed with a shorter, more rigid construction, making it ideal for accurate drilling, minimizing deflection, and reducing breakage in challenging applications.

Key Features

• Professional-Grade Construction: Manufactured from high-grade Hi-Molybdenum high-speed steel with high vanadium content, ensuring superior strength and heat resistance.
• Enhanced Durability: Salt nitride treated, the surface of the drill bit is hardened to effectively drill tough materials such as stainless steel and titanium alloy.
• Optimized Rigidity: The screw machine length, also known as stub-length, provides maximum rigidity, which is crucial for maintaining accuracy and reducing runout when drilling into harder metals and alloys.
• Precision Drilling: Features a 135° split point tip that ensures self-centering and accurate starts without the need for a pilot hole, eliminating drill "walking."
• Secure Grip: Designed with a straight shank, some KnKut drill bits include three flats on the shanks to prevent slippage in drill chucks during operation.
• Versatile Finish: May come with a gold surface treatment for maximum lubricity or an oxide finish for increased wear resistance and improved lubricity, reducing chip welding and galling.

Applications

The KnKut KK7-39 #39 Screw Machine Drill (0.0995" decimal equivalent) is a valuable tool for a range of professional tasks. Its robust design and precision make it suitable for drilling into various materials, including steel, cast iron, aluminum, and hardened alloys commonly found in automotive and industrial components. It excels in applications requiring shallow, precise holes, such as drilling out broken bolts, preparing holes for tapping in engine blocks or chassis, and general repair, maintenance, and fabrication projects where rigidity and accuracy are paramount. This shorter length also makes it excellent for use in tight spaces and with right-angle drills.