01M612 - Walter 1-3/16 Inch SST+ Cobalt Prentice Drill Bit with 1/2 Inch Shank

Heavy-Duty Drilling with Walter SST+ Technology

The Walter 01M612 1-3/16" SST+ Prentice Drill is a high-performance cutting tool engineered for industrial maintenance and fabrication environments where large diameter holes are required but stationary equipment may not be available. Part of Walter's renowned SST+ line, this drill bit is manufactured from a premium cobalt blend high-speed steel. This metallurgical composition provides exceptional heat resistance and hardness, allowing the bit to maintain its cutting edge significantly longer than standard high-speed steel bits, especially when drilling through tough materials like stainless steel and other ferrous alloys.

One of the standout features of this Prentice-style drill is its reduced 1/2-inch shank. This design enables operators to utilize a 1-3/16" diameter bit in standard portable power drills and drill presses that have a maximum chuck capacity of 1/2 inch. To address the high torque requirements of driving such a large bit, Walter has engineered the shank with three precision-ground flats. These flats positively engage with the chuck jaws, virtually eliminating the risk of the bit spinning or slipping inside the chuck under load, ensuring consistent power transmission and operator safety.

Efficiency is at the core of the SST+ design. The bit features an exclusive point geometry that is self-centering, which effectively eliminates the need for pre-drilling pilot holes or using a center punch. This "non-walking" tip bites into the metal immediately, even on curved surfaces, streamlining the drilling process. Furthermore, the tool is finished with a special bronze SST surface treatment. This treatment acts to reduce friction between the tool and the workpiece, facilitating smoother chip evacuation and lower operating temperatures. Whether used in a magnetic base drill or a heavy-duty handheld unit, the Walter 01M612 delivers precision, speed, and longevity.