01H131 - Walter SST+ 31/64-Inch Hex Shank Stub Drill Bit

High-Performance Drilling with Walter SST+ Technology

The Walter 01H131 31/64" Hex Shank Stub Drill is a premium cutting tool designed to meet the rigorous demands of industrial metalworking. Part of the renowned SST+ family, this drill bit is engineered to deliver exceptional performance when working with tough materials such as stainless steel, mild steel, and non-ferrous alloys. Its defining feature is the "stub" or screw machine length, which provides a significantly shorter flute and overall length compared to standard jobber bits. This compact design inherently increases the structural rigidity of the bit, drastically reducing the flex that leads to breakage, especially when applying heavy feed pressure in portable drilling applications.

Efficiency is at the core of the SST+ design. The bit features a precision-ground 135° split point geometry. Unlike standard 118° points that require a pilot hole or center punch to start, the SST+ split point self-centers immediately upon contact with the workpiece. This eliminates the phenomenon of "walking" or wandering across the surface, ensuring precise hole placement every time. For professionals working with sheet metal or thin-walled tubing, this precision is critical to avoiding surface damage and ensuring tight tolerances.

The 01H131 is further enhanced by Walter's proprietary bronze SST surface treatment. This specialized coating serves a dual purpose: it reduces the coefficient of friction between the bit and the material, and it facilitates better chip evacuation. By minimizing friction, the bit generates less heat—the primary enemy of cutting tools—thereby extending the service life of the cutting edges. Additionally, the inclusion of a hex shank is a modern adaptation that caters to high-torque requirements. The hex shape locks positively into the drill chuck, completely eliminating slippage even under high-load conditions, and allows for compatibility with quick-change adapters and impact drivers.

Whether utilized in a stationary drill press or a handheld power drill, the Walter 31/64" Hex Stub Drill offers a blend of durability, speed, and precision that standard bits cannot match. It is the ideal solution for maintenance, repair, and operations (MRO) professionals who require reliable tools that minimize downtime and maximize productivity.