01J009 - Walter #9 Cobalt Stub Drill Bit for Stainless Steel

Precision Engineering for Industrial Drilling

The Walter 01J009 #9 SST Stub Drill represents the intersection of advanced metallurgy and practical geometric design, tailored specifically for the rigorous demands of industrial maintenance and fabrication. In the world of metalworking, rigidity is paramount to accuracy and tool life. This drill bit features a "stub" design, meaning it possesses a shorter overall length and flute length compared to standard jobber drills. This reduction in length significantly decreases the moment arm, thereby minimizing deflection under load. The result is a drill bit that maintains exceptional concentricity and is far less prone to snapping, even when subjected to the lateral forces often encountered in handheld drilling operations.

Material composition is equally critical to the performance of the 01J009. Manufactured from a premium cobalt blend, this tool is engineered to withstand the high temperatures generated when drilling hard materials. Cobalt enhances the red hardness of the steel, allowing the cutting edges to maintain their sharpness longer than standard High-Speed Steel (HSS) counterparts. This makes the bit particularly effective for drilling high-tensile alloys and stainless steel, where heat buildup is a primary cause of tool failure. The addition of Walter's proprietary Bronze SST surface treatment further augments performance by reducing the coefficient of friction between the tool and the workpiece, facilitating smoother chip evacuation and reducing heat generation.

The geometry of the cutting tip is designed for immediate engagement. Featuring a sophisticated split point, the Walter #9 SST Stub Drill is self-centering. This eliminates the need for pre-punching or pilot holes, as the bit penetrates the material surface upon contact without "walking" or wandering. This feature is indispensable when working on curved surfaces, such as pipes or tubing, where standard chisel-point drills often struggle to gain traction. Whether utilized in a stationary drill press or a portable power tool, this drill bit delivers consistent, precise holes with minimal burr formation.

For MRO professionals seeking reliability, the Walter SST Stub Drill series offers a robust solution. Its resistance to breakage translates to reduced downtime and lower consumable costs over time. By combining a rigid structure with high-performance materials, Walter has created a tool that excels in the most challenging drilling applications, from thin sheet metal to solid structural components.