01B501 - Walter SST+ #1 Cobalt Jobber Drill Bit for Stainless Steel

High-Performance Drilling with Walter SST+ Technology

The Walter 01B501 SST+ Jobber Drill Bit (#1 Wire Gauge) represents the pinnacle of drilling efficiency for industrial maintenance and fabrication professionals. Engineered by Walter Surface Technologies, the SST+ series is specifically designed to address the challenges of drilling through tough, high-tensile materials such as stainless steel, while maintaining exceptional performance on mild steel and non-ferrous metals. At the core of this tool is a proprietary cobalt blend high-speed steel substrate, which provides superior hot hardness and wear resistance compared to standard HSS bits. This material composition ensures that the cutting edges retain their sharpness even under the high thermal loads generated during aggressive drilling operations.

Technically, the 01B501 distinguishes itself with advanced geometry. It features an exclusive "Speed Tip," a self-centering 135-degree split point that engages the material immediately upon contact. This eliminates the phenomenon of "walking" or wandering, which is critical when drilling on curved surfaces or pipes without a center punch. Furthermore, the drill bit utilizes a unique "high flow" flute design. This geometry optimizes chip evacuation, pulling debris away from the cutting zone rapidly. Efficient chip removal is vital for preventing heat buildup—the primary cause of premature tool failure in work-hardening materials like stainless steel.

In addition to its cutting geometry, the SST+ drill bit incorporates a back-tapered body. This subtle reduction in diameter from the tip to the shank significantly reduces surface contact friction between the tool and the hole wall, preventing binding and breakage. The tool is finished with a special bronze SST surface treatment, which not only enhances surface hardness but also adds a layer of lubricity to further smooth the drilling process. For MRO professionals seeking to reduce cycle times and tool replacement costs, the Walter 01B501 offers a robust, reliable solution that delivers consistent hole quality and extended service life.