01H012 - Walter 3/16 Inch SST Stub Drill Bit for Stainless and Sheet Metal

Precision Engineering for Tough Materials

The Walter 01H012 3/16" SST Stub Drill is a pinnacle of industrial drilling technology, specifically engineered for the demanding requirements of metal fabrication and maintenance operations. Unlike standard jobber length bits that are prone to flexing and snapping under lateral pressure, this stub (or screw machine) length bit offers superior rigidity. This structural integrity is critical when drilling through tough alloys like stainless steel or when working with thin-walled materials where control is paramount. The shorter overall length reduces the torque arm, allowing for higher feed pressure without the risk of deflection, ensuring that every hole is round, precise, and burr-free.

Advanced Geometry and Surface Treatment

At the core of this tool's performance is its 135° split point geometry. Traditional 118° points often require a center punch to prevent the bit from "walking" across the workpiece. The Walter SST's 135° point is self-centering, biting into the material immediately upon contact. This feature is indispensable when drilling into rounded surfaces or performing repetitive drilling tasks where efficiency is measured in seconds. Furthermore, the bit features Walter's exclusive Bronze SST surface treatment. This specialized coating significantly reduces the coefficient of friction between the tool and the workpiece, facilitating smoother chip evacuation and reducing heat generation—the primary cause of premature tool failure in work-hardening materials like stainless steel.

Optimized for Confined Spaces

Industrial environments often present access challenges. The compact design of the Walter 01H012 allows it to fit into tight quarters where a standard length drill simply cannot go. Whether you are drilling out rivets in an automotive frame, installing fasteners in HVAC ducting, or performing maintenance on complex machinery, the reduced profile of this stub drill provides the clearance necessary to get the job done. Combined with its ability to withstand higher torque loads, this drill bit represents a significant upgrade in both durability and operational capability for professional machinists and fabricators.