01H031 - Walter SST 31/64" Heavy-Duty Stub Drill Bit

High-Performance Drilling with Walter SST Stub Drills

The Walter 31/64" SST Stub Drill (SKU: 01H031) is a premium cutting tool designed for industrial professionals who demand precision and durability. Engineered by Walter Surface Technologies, this drill bit belongs to the renowned SST series, known for its ability to tackle tough materials where standard jobber-length bits often fail. The defining characteristic of this tool is its "stub" or screw machine length. By reducing the overall length and flute length, the bit achieves superior rigidity. This increased stiffness minimizes deflection and vibration during operation, which is critical when drilling into hard alloys or when applying significant feed pressure.

One of the standout features of the 01H031 is its 135° split point geometry. Unlike standard 118° points, the 135° split point is self-centering. It bites into the material immediately upon contact, effectively eliminating the "walking" phenomenon common on smooth or curved surfaces. This feature removes the necessity for pre-punching center holes, thereby streamlining the fabrication process and saving valuable time. The split point also reduces the thrust load required to penetrate the workpiece, making it easier on both the operator and the power tool.

The bit is treated with a special bronze SST surface finish. This treatment is not merely cosmetic; it serves a functional purpose by reducing the coefficient of friction between the tool and the workpiece. Lower friction translates to reduced heat generation, which is the primary enemy of cutting tool life. This makes the Walter SST Stub Drill particularly effective for drilling stainless steel, a material known for work-hardening if heat is allowed to build up. Additionally, the short design makes this bit an excellent choice for drilling thin-walled materials like sheet metal, where a rigid tool produces cleaner, rounder holes with fewer burrs.

Whether utilized in a stationary drill press or a portable hand drill, the Walter 31/64" SST Stub Drill delivers consistent performance. Its robust web construction resists breakage, ensuring that the tool remains operational even under the stress of heavy-duty MRO (Maintenance, Repair, and Operations) environments. It is the ideal solution for confined spaces where a standard length drill simply will not fit.