01J005 - Walter SST+ Stub Drill Bit, Wire Gauge #5, Cobalt Blend

Precision Drilling with Walter SST Stub Drills

The Walter #5 SST Stub Drill (SKU: 01J005) represents the pinnacle of drilling performance for industrial applications requiring high rigidity and precision. Part of Walter's renowned SST+ family, this drill bit is engineered specifically to address the challenges of drilling through tough materials like stainless steel and thin-gauge sheet metal. Unlike standard jobber-length bits, the stub (or screw machine) length design features shorter flutes and a more compact overall profile. This structural difference drastically reduces flexibility in the bit, ensuring that the energy from your drill is transferred directly into the cut without wobbling or deflection.

Manufactured from a premium cobalt blend, this drill bit offers superior heat resistance compared to standard high-speed steel. This is critical when working with work-hardening materials such as stainless steel, where heat buildup can rapidly dull a cutting edge. To further enhance performance, Walter applies their exclusive Bronze SST surface treatment. This specialized coating acts as a lubricant, reducing friction at the cutting interface and facilitating smoother chip evacuation. The result is a tool that cuts faster, stays cooler, and lasts significantly longer between changes.

The geometry of the tip is equally impressive. Featuring a self-centering split point, the Walter #5 SST Stub Drill bites into the material immediately upon contact. This eliminates the need for a center punch and prevents the bit from "walking" or skating across the surface, which is particularly beneficial when drilling into rounded surfaces or pipes. Whether you are operating a stationary drill press or using a portable hand drill in the field, this bit provides the stability and durability needed for professional-grade results.

Key Technical Benefits

• Enhanced Rigidity: Short flute design minimizes breakage and deflection.
• Heat Resistance: Cobalt blend material withstands high drilling temperatures.
• Precision Starting: Split point geometry ensures accurate hole placement without wandering.
• Versatile Application: Ideal for mild steel, non-ferrous metals, and stainless steel.