01A520 - Walter SST+ 5/16-Inch Cobalt Drill Bit for Stainless Steel

Heavy-Duty Cobalt Drill Bit for Industrial Applications

The Walter 01A520 5/16" SST+ Drill Bit is a premium cutting tool engineered to deliver exceptional performance in the most demanding industrial environments. Designed specifically for drilling through hard metals, this bit features a proprietary cobalt blend body that maintains hardness even under high temperatures. This heat resistance is critical when machining materials with high tensile strength, such as stainless steel, where standard high-speed steel bits often fail prematurely.

Precision is at the core of the SST+ design. The bit utilizes a 135° split point geometry, which provides immediate self-centering upon contact with the workpiece. This eliminates the need for pre-punching and prevents the bit from "walking" or skating across round surfaces like pipes and tubing. The heavy-duty, fully ground body ensures tight concentricity, resulting in accurate, round holes every time.

Efficiency is further enhanced by Walter's exclusive "high flow" flute design. This geometry is optimized to evacuate chips rapidly from the hole, significantly reducing friction and heat buildup. By keeping the cutting zone cooler, the SST+ prevents the work-hardening of stainless steel, a common challenge that can destroy lesser tools. Finished with a unique bronze SST surface treatment, this drill bit offers reduced resistance and extended tool life, making it a cost-effective solution for fabrication shops, maintenance departments, and manufacturing facilities.