01M547 - Walter SST+ 47/64" Cobalt Prentice Drill Bit with 1/2" Shank

Precision Drilling for Hard Alloys

The Walter 01M547 47/64" SST+ Prentice Drill Bit represents the pinnacle of drilling technology for industrial applications. Engineered by Walter Surface Technologies, this bit is specifically designed to tackle the challenges of drilling large-diameter holes in tough materials such as stainless steel, mild steel, and non-ferrous metals. The core of its performance lies in its material composition; manufactured from a premium cobalt blend of high-speed steel (HSS), the SST+ series maintains hardness even at high temperatures, significantly extending the tool's lifespan compared to standard HSS bits.

One of the most critical features of the 01M547 is its shank design. Large diameter bits often suffer from slippage when high torque is applied, damaging both the bit and the drill chuck. This Prentice-style bit features a reduced 1/2-inch shank machined with three distinct flats. This "Sure-Grip" design ensures a positive lock within the chuck jaws, allowing for maximum power transmission without the frustration of the bit spinning stationary while the chuck rotates. This makes it an ideal choice for use with portable power drills, stationary drill presses, and magnetic base drilling units.

Efficiency is paramount in professional environments, and the SST+ geometry delivers. The bit utilizes an exclusive self-centering 135° split point that bites into the metal immediately upon contact. This eliminates the common issue of "walking" and removes the necessity for center punching or drilling smaller pilot holes, saving valuable time on every job. Furthermore, the specialized bronze SST surface treatment reduces friction and heat buildup, facilitating smoother chip evacuation and cleaner holes. For professionals demanding precision, longevity, and reliability in their tooling, the Walter 01M547 is the superior choice.