01A518 - Walter SST+ 9/32" Cobalt Drill Bit for Stainless Steel

High-Performance Drilling with Walter SST+ Technology

The Walter 01A518 9/32" SST+ Drill Bit represents the pinnacle of drilling technology for industrial maintenance and fabrication. Engineered by Walter Surface Technologies, the SST+ series is specifically designed to address the challenges of drilling through tough materials like stainless steel, while maintaining versatility for mild steel and non-ferrous metals. At the core of this tool is a proprietary cobalt blend substrate. Unlike standard High-Speed Steel (HSS), this cobalt-enriched formulation provides exceptional hot hardness, allowing the bit to maintain its cutting edge even under the high temperatures generated during aggressive drilling operations.

A defining feature of the SST+ line is the exclusive "High Flow" flute design. This geometry is optimized to evacuate chips rapidly from the hole, preventing clogging and reducing the thermal load on both the bit and the workpiece. Efficient chip removal is critical in preventing work hardening, particularly in austenitic stainless steels. Furthermore, the bit undergoes a specialized bronze SST surface treatment. This treatment acts as a lubricant, significantly reducing friction and torque requirements, which in turn extends battery life for cordless tool users and reduces strain on stationary machinery.

Precision is paramount in the manufacturing of the 01A518. The body is fully ground, ensuring strict concentricity and precise hole dimensions. The geometry includes a self-centering split point (typically 135 degrees for this class), which allows for immediate penetration upon contact. This feature is indispensable when drilling on curved surfaces, such as pipes or tubing, as it eliminates the tendency of the bit to "walk" or wander, thereby removing the necessity for pre-punching. Whether utilized in a hand drill or a drill press, the Walter SST+ 9/32" bit delivers consistent, heavy-duty performance.