05A405 - Walter SST Core Cut Annular Cutter 1-5/16 Inch x 2 Inch Depth

Technical Overview of the Walter SST Core Cut

The Walter 05-A-405 SST Core Cut is a high-performance annular cutter engineered for precision industrial drilling applications. With a diameter of 1-5/16 inches and a cutting depth capacity of 2 inches, this tool is designed to meet the rigorous demands of heavy fabrication and structural steelwork. The defining feature of this series is the proprietary SST (Special Surface Treatment), a bronze-colored coating that significantly alters the tribological properties of the tool surface. By reducing the coefficient of friction between the cutter and the workpiece, the SST coating minimizes heat generation—the primary cause of tool failure and work hardening in sensitive materials like stainless steel.

Structurally, the cutter utilizes a modern tooth geometry combined with fully ground, extra-large flutes. This design optimization ensures rapid and efficient chip evacuation, preventing chip packing that can lead to binding or breakage during deep hole drilling. The universal shank design allows for seamless integration with a broad spectrum of magnetic drilling units and stationary drill presses, eliminating the need for specialized adapters in most setups. The cutter is manufactured from high-quality high-speed steel (HSS) and treated to eliminate surface porosity, resulting in a cutting edge that remains sharp longer and produces a burr-free finish that often negates the need for secondary reaming or deburring operations.

This tool is specifically calibrated for use on a variety of ferrous and non-ferrous metals, including mild steel, structural steel plates, stainless steel, and aluminum. The reduction in friction not only extends the lifespan of the cutter but also reduces the load on the drilling machine's motor, contributing to overall equipment longevity. For MRO professionals and machinists seeking a reliable, high-efficiency solution for large diameter hole making, the Walter SST Core Cut offers a technically superior balance of speed, durability, and finish quality.