01B558 - Walter SST+ Cobalt Jobber Drill Bit, Wire Gauge #58

Technical Overview of the Walter SST+ Jobber Drill

The Walter #58 SST+ Jobber Drill (SKU: 01B558) represents the pinnacle of drilling technology for industrial maintenance and fabrication. Engineered by Walter Surface Technologies, this drill bit is specifically formulated to address the challenges of drilling through hard, high-tensile materials. The core of the SST+ performance lies in its material composition: a premium cobalt blend high-speed steel (HSS). This substrate provides exceptional hot hardness, allowing the cutting edges to maintain their sharpness even under the high thermal loads generated when drilling stainless steel and other tough alloys.

Geometrically, the SST+ is designed for efficiency and precision. It features a 135° split point, marketed as the "Speed Tip," which is self-centering. This geometry eliminates the phenomenon of "walking" upon initial contact, ensuring precise hole placement without the prerequisite of a center punch. Furthermore, the bit incorporates a "High Flow" flute design. This specialized helix angle and flute profile optimize the evacuation of chips from the hole, a critical factor in preventing heat buildup and work hardening of the material. The back-tapered body design further reduces friction between the drill and the hole walls, minimizing torque requirements and machine stress.

Surface treatment is another key differentiator. The bit undergoes an exclusive bronze SST surface treatment. This treatment is not merely cosmetic; it acts as a solid lubricant to reduce the coefficient of friction during the drilling process. This reduction in friction translates to lower operating temperatures and extended tool life. The Walter SST+ is suitable for a wide range of applications, including stationary drill presses and portable hand drills, making it a versatile choice for MRO professionals requiring reliable performance in mild steel, stainless steel, and non-ferrous metals.