01M563 - Walter SST+ 63/64-Inch Reduced Shank Cobalt Drill Bit

Heavy-Duty Industrial Drilling with Walter SST+ Prentice Bits

The Walter 01M563 63/64" SST+ Prentice Drill Bit is a premium cutting tool engineered for the most demanding industrial environments. Designed to bridge the gap between standard jobber drills and large-diameter hole requirements, this bit features a reduced shank design known as the "Prentice" style. This configuration allows operators to drill large 63/64-inch holes using standard equipment with a 1/2-inch chuck capacity, such as portable power drills, magnetic base drills, and stationary drill presses. The bit is manufactured from a high-grade cobalt blend, which provides exceptional hardness and heat resistance, significantly outperforming standard high-speed steel (HSS) bits in tough materials.

One of the critical challenges in drilling large diameters with portable tools is the tendency for the bit to slip within the chuck under high torque. Walter has addressed this with a precision-engineered shank featuring three ground flats. These flats provide a positive lock within the chuck jaws, ensuring maximum torque transmission and preventing the bit from spinning, which can damage both the bit shank and the drill chuck. This secure grip is essential for maintaining safety and efficiency during heavy-duty fabrication tasks.

Efficiency is further enhanced by Walter's exclusive point geometry. Unlike conventional drill bits that often require a center punch or a smaller pilot hole to prevent walking, the SST+ Prentice drill features a self-centering tip. This design bites into the material immediately upon contact, allowing for faster penetration and accurate hole placement. The special bronze SST surface treatment adds a layer of lubricity and oxidation resistance, facilitating smoother chip evacuation and reducing heat buildup. Whether working with mild steel, non-ferrous metals, or challenging stainless steel alloys, the Walter 01M563 delivers consistent, high-quality results for maintenance, repair, and fabrication professionals.