01B539 - Walter SST+ #39 Wire Gauge Drill Bit, Cobalt Blend, 135° Split Point

Precision Drilling with Walter SST+ Technology

The Walter #39 SST+ Jobber Drill Bit (SKU: 01B539) represents the pinnacle of drilling performance for industrial applications. Engineered by Walter Surface Technologies, this bit is part of the renowned SST+ series, designed to tackle the most demanding materials found in modern fabrication shops. With a specific Wire Gauge #39 size (0.0995 inches), this tool is essential for precision holes where tolerance and finish are critical. Unlike standard high-speed steel bits that dull quickly under thermal stress, the SST+ is crafted from a proprietary cobalt blend. This metallurgical composition provides exceptional hot hardness, allowing the bit to maintain its cutting edge even when drilling through tough substrates like stainless steel and titanium alloys.

One of the standout features of the 01B539 is its 135° split point geometry. This self-centering design is a game-changer for machinists and fabricators. It eliminates the phenomenon known as "walking," where the bit skids across the workpiece before penetrating. This means you can drill directly into round surfaces, such as pipes or tubing, without the mandatory step of center punching, saving valuable time during production runs. Furthermore, the split point reduces the thrust load required to push the bit through the material, resulting in less operator fatigue and less wear on your power tools.

Chip evacuation is often the failure point for small diameter bits, but Walter has addressed this with a high-flow flute design. The geometry of the flutes is optimized to pull debris up and out of the hole rapidly. This prevents chip packing—a common cause of bit breakage and overheating. Coupled with Walter's exclusive Bronze SST surface treatment, the bit exhibits reduced friction coefficients. This treatment acts as a lubricant barrier, keeping the drilling temperature lower and further extending the tool's lifespan. Whether used in a stationary drill press for repetitive tasks or a portable hand drill for maintenance work, the Walter SST+ #39 delivers consistent, burr-free results.

For professionals who demand reliability, the Walter SST+ is the definitive choice. It is rated for a wide range of materials, including mild steel, non-ferrous metals, and specifically stainless steel. By investing in high-quality tooling like the 01B539, shops can reduce downtime associated with bit changes and ensure that every hole drilled meets rigorous quality standards.