01A028A - Walter 7/16 Inch SST Cobalt Jobber Drill Bit with Quick Shank

High-Performance Drilling with Walter SST Technology

The Walter 01A028A 7/16" SST Jobber Drill Bit represents the pinnacle of drilling efficiency and durability for industrial applications. Engineered by Walter Surface Technologies, this bit is crafted from a specialized cobalt blend that significantly enhances hardness and heat resistance compared to standard high-speed steel bits. This material composition allows the SST bit to maintain a sharp cutting edge even when subjected to the high temperatures generated during continuous drilling in tough materials like mild steel, aluminum, and non-ferrous metals.

One of the standout features of this tool is the exclusive Quick Shank design. Traditional round shanks often suffer from slippage within the chuck, especially under high torque loads. The Quick Shank geometry ensures a positive lock in both keyed and keyless chucks, effectively eliminating slippage. This secure grip translates to better power transmission and prevents damage to the bit shank and the drill chuck. Furthermore, the bit is specifically optimized for cordless power tools, where energy efficiency is paramount. The design reduces mechanical resistance, allowing operators to achieve more holes per battery charge, thereby increasing overall productivity on the job site.

Precision is at the core of the SST design. The bit features a self-centering "Speed Tip" that allows for immediate engagement with the workpiece. This eliminates the tendency for the bit to "walk" or wander across the surface, which is particularly beneficial when drilling into round or curved surfaces such as pipes and tubing. The need for pre-punching is largely removed, streamlining the fabrication process. Additionally, the heavy-duty fully ground body includes a back tapered design. This geometry minimizes surface contact between the bit body and the hole walls, reducing friction and preventing binding. Finished with a special bronze SST surface treatment, this drill bit offers superior chip evacuation and extended service life, making it a reliable choice for professionals demanding precision and longevity.