01A516 - Walter SST+ 1/4 Inch Cobalt Drill Bit for Stainless Steel

Precision Engineering for Industrial Drilling

The Walter SST+ 1/4" Drill Bit (SKU: 01A516) represents the pinnacle of drilling technology for industrial maintenance and fabrication. Engineered with an exclusive cobalt blend, this tool is specifically designed to overcome the challenges of drilling through high-tensile materials such as stainless steel, while maintaining exceptional performance on mild steel and non-ferrous metals. Unlike standard high-speed steel bits that dull rapidly under thermal stress, the SST+ formulation maintains hardness at higher temperatures, ensuring a significantly extended service life in demanding production environments.

One of the standout features of the 01A516 is its sophisticated geometry. It utilizes a 135-degree split point design which serves two critical functions: it eliminates the need for a center punch by self-centering immediately upon contact, and it reduces the thrust load required to penetrate the material. This results in less operator fatigue and greater accuracy, particularly when drilling on curved surfaces like pipes or tubing. The fully ground body ensures concentricity, providing precise hole sizing that meets tight tolerances required in professional assembly.

Chip evacuation is a primary failure point in deep hole drilling, but Walter has addressed this with their proprietary "High Flow" flute design. This spiral geometry efficiently channels chips away from the cutting edge, preventing clogging and reducing heat buildup—the enemy of drill bit longevity. Furthermore, the bit features a specialized bronze SST surface treatment. This treatment acts as a lubricant and heat shield, further reducing friction during the cut. For MRO professionals and machinists who demand reliability and speed, the Walter SST+ 1/4" bit delivers consistent, high-quality results hole after hole.

Whether utilized in a stationary drill press or a portable hand drill, the structural integrity of the SST+ bit resists breaking under torque. It is an essential component for any tool crib managing diverse material applications, offering a versatile solution that reduces the need for frequent bit changes and inventory variety.