01J008 - Walter SST+ Cobalt Stub Drill Bit, Wire Gauge #8

Precision Drilling with Walter SST Stub Drill Bits

The Walter #8 SST Stub Drill Bit (01J008) represents the pinnacle of drilling performance for industrial MRO and fabrication environments. Designed specifically to address the common challenges associated with drilling hard metals and thin gauge sheets, this tool is an essential addition to any professional toolkit. The core of its performance lies in its cobalt blend construction. Unlike standard high-speed steel (HSS) bits, the addition of cobalt significantly increases the bit's hot hardness, allowing it to maintain a sharp cutting edge even when subjected to the high temperatures generated when drilling stainless steel and other tough alloys.

One of the standout features of the SST series is its stub length geometry. Traditional jobber length bits often suffer from flexibility, which can lead to wandering, oval-shaped holes, or catastrophic breakage when lateral pressure is applied. The Walter SST Stub Drill features a shorter overall length and flute length, providing exceptional rigidity. This stiffness is crucial when drilling into rounded surfaces or when using portable hand drills where maintaining a perfectly perpendicular angle is difficult. The result is a drill bit that goes exactly where you point it and stays intact, even under heavy feed pressure.

Efficiency is further enhanced by the self-centering split point. This advanced tip geometry bites into the material immediately upon contact, eliminating the need for pre-punching or pilot holes. This is particularly advantageous when working with sheet metal, where bit walking can scratch pristine surfaces. Furthermore, the unique Bronze SST surface treatment acts as a lubricant and heat deflector, reducing friction between the bit and the workpiece. This coating not only speeds up the drilling process but also extends the life of the tool by preventing chip welding and heat damage.

Whether you are working in an automotive body shop, installing HVAC ducting, or fabricating custom stainless steel components, the Walter 01J008 delivers reliability and precision. Its robust design minimizes downtime caused by broken bits and ensures clean, burr-free holes in a wide variety of ferrous and non-ferrous metals.