01D615 - Walter SST+ 11.50mm Cobalt Drill Bit for Stainless Steel

Precision Engineering for Industrial Drilling

The Walter 01D615 11.50mm SST+ Drill Bit is a high-performance cutting tool designed to meet the rigorous demands of industrial maintenance and fabrication. Engineered by Walter Surface Technologies, this drill bit distinguishes itself through a proprietary cobalt blend substrate that significantly enhances hardness and thermal resistance. This material composition allows the bit to maintain its cutting edge even under the high-temperature conditions generated when drilling through tough alloys such as stainless steel and structural steel.

A key technical feature of the SST+ series is the "High Flow" flute design. This geometry is optimized to evacuate chips rapidly from the hole, preventing clogging and reducing the thermal load on both the bit and the workpiece. Efficient chip removal is critical in preventing work hardening, a common issue when drilling austenitic stainless steels. Furthermore, the bit features a back-tapered body which reduces the surface area in contact with the hole walls, thereby minimizing friction and torque requirements. This design consideration not only extends the life of the tool but also reduces wear on the drilling equipment itself.

The 135° split point geometry is another essential specification, providing self-centering capabilities that eliminate the need for center punching. This ensures precise hole placement and reduces the axial force required to initiate the cut. Finished with a specialized bronze SST surface treatment, the 01D615 offers improved lubricity and corrosion resistance. Whether utilized in stationary drill presses or portable hand drills, this 11.50mm bit delivers consistent, round holes with superior surface finish, making it an indispensable asset for MRO professionals requiring reliability and precision.