01J024 - Walter SST+ #24 Cobalt Stub Drill Bit for Stainless Steel

Precision Drilling with Walter SST Stub Drill Bits

The Walter 01J024 #24 SST Stub Drill is a high-performance cutting tool engineered specifically for the rigorous demands of industrial metalworking. Designed with a focus on rigidity and durability, this drill bit addresses the common challenges faced when drilling into hard materials like stainless steel and high-tensile alloys. The core of this tool is its premium cobalt blend construction. Unlike standard high-speed steel (HSS) bits, the addition of cobalt significantly increases the bit's hot hardness, allowing it to maintain a sharp cutting edge even at the elevated temperatures generated when drilling tough metals. This metallurgical advantage translates to longer tool life and reduced downtime for tool changes in production environments.

One of the defining features of the 01J024 is its "stub" or screw machine length. By reducing the overall length and flute length compared to a standard jobber bit, Walter has created a tool with superior structural rigidity. In sheet metal applications or when using hand-held drills, long bits often flex, leading to wandering, chatter, and eventually breakage. The stub design minimizes this deflection, ensuring that the torque is transferred directly to the cutting edge. This rigidity is crucial when drilling through thin-gauge materials where precision and hole roundness are paramount. Furthermore, the shorter profile allows for operation in confined spaces where a standard length bit would be cumbersome.

The geometry of the cutting tip is equally advanced. Featuring a self-centering split point, the Walter SST Stub Drill begins cutting immediately upon contact with the workpiece. This eliminates the phenomenon known as "walking," where the bit skids across the surface before penetrating, often damaging the finish. This feature removes the necessity for pre-punching center holes, thereby streamlining the fabrication workflow. To further enhance performance, the bit is finished with a specialized Bronze SST surface treatment. This coating acts to reduce the coefficient of friction between the tool and the workpiece, promoting smoother chip flow and reducing heat buildup. For MRO professionals and fabricators requiring reliable, precise holes in stainless steel and sheet metal, the Walter 01J024 offers an optimal balance of strength, geometry, and material science.