01C517 - Walter SST+ Letter Q Cobalt Drill Bit - 0.3320 Inch Heavy Duty

High-Performance Drilling with Walter SST+ Technology

The Walter Letter Q SST+ Drill Bit (SKU: 01C517) is an industrial-grade cutting tool engineered to deliver superior performance in the most demanding maintenance and fabrication environments. Manufactured with a proprietary cobalt blend, this drill bit is specifically formulated to withstand the high temperatures generated when drilling through tough materials such as stainless steel, mild steel, and various non-ferrous alloys. Unlike standard high-speed steel bits that may anneal and dull rapidly under thermal stress, the SST+ maintains its hardness and cutting edge integrity, ensuring consistent results hole after hole.

A defining feature of the SST+ series is the exclusive "Speed Tip." This innovative geometric design is self-centering, allowing the operator to engage the material immediately without the bit "walking" or skating across the surface. This capability eliminates the need for pre-marking with a center punch, significantly reducing setup time and improving overall workflow efficiency. For deep hole applications, the bit utilizes a "high flow" flute design that excels at chip evacuation. By rapidly removing debris from the cutting zone, the tool minimizes heat buildup and friction, which are the primary causes of premature tool failure.

Further enhancing its performance is the special bronze SST surface treatment and a back-tapered body design. The bronze oxide finish acts as a lubricant and protective barrier, while the tapered body reduces the surface area in contact with the hole walls. Together, these features drastically reduce friction and torque requirements, allowing for faster drilling speeds with less operator fatigue. Whether used in a stationary drill press or a portable hand drill, the Walter Letter Q SST+ Drill Bit provides the reliability and precision required for professional-grade metalworking.