01A016A - Walter SST 1/4-Inch Jobber Drill Bit with Quick Shank

High-Performance Engineering for Precision Drilling

The Walter SST Jobber Drill Bit (SKU: 01A016A) represents a significant evolution in drilling technology, specifically engineered to address the common failure modes of standard high-speed steel bits. At the core of its performance is a proprietary cobalt blend substrate. This material composition provides exceptional hot hardness, allowing the bit to maintain its cutting edge even when subjected to the high temperatures generated during aggressive drilling in mild steel and non-ferrous metals. The addition of a specialized bronze SST surface treatment further reduces the coefficient of friction, facilitating smoother chip evacuation and reducing thermal stress on the tool.

Exclusive Quick Shank Technology

One of the defining technical features of this 1/4-inch bit is the exclusive Quick Shank design. In high-torque applications, cylindrical shanks often succumb to slippage within the chuck jaws, leading to damage to both the bit and the drill chuck. The Quick Shank features engineered flats that mechanically lock into the jaws of both keyed and keyless chucks. This positive engagement ensures 100% torque transmission from the power source to the cutting edge, maximizing the efficiency of the drilling operation and protecting the equipment from wear caused by spinning shafts.

Advanced Geometry for Efficiency

The geometric design of the SST bit is tailored for accuracy and speed. It utilizes a self-centering "Speed Tip" that eliminates the phenomenon of "walking" upon initial contact, thereby removing the necessity for center punching in many applications. Furthermore, the body of the bit is back-tapered. This subtle reduction in diameter behind the cutting margins significantly reduces surface contact with the hole walls, minimizing friction and preventing binding. This design is particularly beneficial when drilling through multiple layers or thin gauge metals, ensuring a clean, burr-free exit and maintaining the structural integrity of the workpiece.