01D585 - Walter SST+ 8.5mm Cobalt Drill Bit for Stainless Steel

High-Performance Drilling with Walter SST+ Technology

The Walter 01D585 8.5mm SST+ Drill Bit represents the pinnacle of drilling technology for industrial maintenance and fabrication. Engineered to address the common challenges faced when drilling tough materials, this bit features a proprietary cobalt blend that significantly enhances hardness and heat resistance. Unlike standard high-speed steel bits that dull quickly when facing the thermal stresses of drilling stainless steel, the SST+ maintains its cutting edge longer, ensuring consistent performance hole after hole. The inclusion of cobalt allows the bit to withstand higher drilling temperatures, making it an indispensable tool for high-tensile alloys and abrasive metals.

Technical precision is at the core of the SST+ design. It utilizes a 135-degree split point geometry which serves two critical functions: it eliminates the need for center punching by self-centering immediately upon contact, and it reduces the thrust force required to penetrate the material. This is complemented by Walter's innovative "High Flow" flute design. These specially engineered flutes are optimized to evacuate chips rapidly from the hole, preventing clogging and reducing the friction that leads to heat buildup. The result is a cooler drilling process that protects both the tool and the workpiece from thermal damage.

Durability is further enhanced by the bit's back-tapered body and exclusive bronze SST surface treatment. The back taper reduces the surface area in contact with the hole walls, minimizing friction and the risk of binding—a common issue in deep hole drilling. The bronze treatment acts as a lubricant and protective layer, further smoothing the drilling action. Whether utilized in a stationary drill press for precision work or a portable hand drill for on-site maintenance, the Walter 8.5mm SST+ bit delivers reliable, heavy-duty performance that professionals trust for their most demanding applications.