Letter Stub Length Screw Machine Drill Bit Set A - Z 26 Pc - KnKut

The KnKut 26KK7 Letter Stub Length Screw Machine Drill Bit Set delivers professional-grade drilling performance for demanding automotive and industrial applications. This comprehensive 26-piece set, covering sizes A through Z, is engineered from Hi-Molybdenum tool steel, providing superior durability and precision in challenging materials. It is an essential addition for technicians requiring consistent, accurate results in strenuous environments.

Key Features

• Premium Hi-Molybdenum Tool Steel Construction: Manufactured from a high-grade Hi-Molybdenum (M-series HSS) tool steel, these bits offer excellent hardness, wear resistance, and toughness. This material provides comparable performance to cobalt drills, with the added benefit of maintaining structural integrity and sharpness even in high-temperature drilling operations.
• Enhanced Gold Surface Treatment: The gold surface treatment, typically Titanium Nitride (TiN), on the body and clearance maximizes lubricity and reduces friction and heat buildup during drilling. This extends bit life, improves cutting efficiency, and enhances corrosion resistance.
• Heavy-Duty Stub Length Design: The screw machine (stub length) design provides increased rigidity due to its shorter overall and flute length, minimizing deflection and significantly reducing bit breakage. This compact form factor is well-suited for use in tight spaces and with right-angle drills.
• 135-Degree Split Point Tip: The self-centering 135-degree split point penetrates materials quickly and precisely, preventing the bit from walking or skidding across the surface without the need for a center punch. This design requires less thrust and is ideal for drilling hard metals.
• Optimized for Hard Metals: These drill bits are engineered for reliable performance in tough materials such as work-hardening grades of stainless steel, cast iron, high-tensile alloys, and titanium alloy commonly encountered in industrial fabrication and automotive repair.

Applications

This KnKut drill bit set is a reliable tool for professional technicians and mechanics involved in automotive repair, heavy equipment maintenance, and industrial fabrication. It excels in drilling through challenging materials such as work-hardening stainless steel, cast iron, and various hardened alloys often found in vehicle chassis components, machinery frameworks, and industrial equipment. The robust design makes these bits suitable for continuous heavy-duty drilling where precision and tool longevity are critical, including drilling out spot welds.