01M544 - 11/16" SST+ Cobalt Prentice Drill Bit with 1/2" Shank

Heavy-Duty Precision for Large Diameter Drilling

The Walter 01M544 11/16" SST+ Prentice Drill Bit is engineered for industrial professionals who demand reliability and precision when drilling large holes in tough materials. Part of Walter's renowned SST+ line, this drill bit is formulated with a high-performance cobalt blend that provides exceptional heat resistance and durability, making it ideal for repetitive drilling in stainless steel, mild steel, and non-ferrous metals.

One of the standout features of this bit is its "Prentice" style design, which incorporates a reduced 1/2-inch shank. This allows operators to utilize a larger 11/16" cutting diameter in standard portable drills, drill presses, and magnetic base drills that are limited to a 1/2" chuck capacity. To address the high torque requirements of driving a large bit, the shank is machined with three flats. This design feature locks the bit securely into the chuck, preventing the frustrating slippage that often damages both the bit and the equipment during heavy-duty operations.

Efficiency is at the core of the SST+ design. The bit features an exclusive point geometry that is self-centering, effectively eliminating the need for pre-drilling or center punching. This allows for faster hole starts and reduces the tendency for the bit to "walk" on curved surfaces. Finished with a special bronze SST surface treatment, the 01M544 reduces friction and heat buildup, ensuring smooth chip flow and a cleaner cut every time.