01R231 - Walter SST+ 31/64" Drill Bit, 3/8" Reduced Shank, 135° Split Point

High-Performance Drilling with Walter SST+ Technology

The Walter 01R231 SST+ Drill Bit is a premium cutting tool engineered to address common challenges in industrial maintenance and fabrication. Specifically designed with a 31/64-inch diameter, this bit features a reduced 3/8-inch shank, making it compatible with a wider range of power tools, including those limited to a 3/8-inch chuck capacity. This design feature eliminates the need for specialized heavy-duty drills for medium-diameter holes, providing greater flexibility on the shop floor or in the field. The bit is manufactured using Walter’s proprietary SST+ geometry, which is optimized for drilling through tough materials such as stainless steel, mild steel, and various non-ferrous metals.

One of the standout technical features of this drill bit is its 135-degree self-centering split point. In precision engineering environments, hole accuracy is paramount. The split point design ensures that the bit engages with the material immediately upon contact, effectively preventing the "walking" or wandering often associated with standard 118-degree points. This capability allows operators to drill precise holes without the prerequisite of center punching, thereby reducing cycle times and improving overall workflow efficiency. Furthermore, the geometry of the cutting edges is designed to shear material efficiently with minimal downward pressure, which not only preserves the tool's life but also reduces heat buildup—a critical factor when working with work-hardening materials like stainless steel.

Durability and reliability are at the core of the SST+ series. The 01R231 is built to withstand the rigors of stationary machine use as well as the instability often encountered with portable drilling. Its robust web construction resists torsional stress, reducing the likelihood of breakage under load. For MRO professionals looking for a reliable solution for tapping preparation or clearance holes, this drill bit offers a consistent, high-quality finish. Whether utilized for drilling round surfaces, pipes, or flat plate, the Walter SST+ reduced shank bit delivers industrial-grade performance that meets the stringent demands of modern manufacturing and repair operations.