03B641 - Walter 7/8-9 UNC Heavy Duty Power Tap for Stainless Steel

High-Performance Tapping for Industrial Applications

The Walter 03B641 7/8-9 UNC SST Power Tap is a precision-engineered cutting tool designed to bridge the gap between manual tapping and stationary machine tapping. Developed by Walter Surface Technologies, this tool is specifically optimized for use with reversible portable power drills, allowing operators to cut threads in heavy-duty industrial environments where stationary equipment is not feasible. The tap features a robust 7/8-9 UNC thread profile suitable for a wide range of fastening applications.

Central to its performance is the proprietary SST surface treatment. This advanced coating drastically reduces friction at the cutting interface, lowering heat generation and preventing galling—a common issue when tapping stainless steel and other tough alloys. The reduction in friction not only extends the life of the tool but also ensures a cleaner, more precise thread form. The tool's geometry includes a "Power Tip" (spiral point) design, which ejects chips forward ahead of the cutting action. This feature is critical for maintaining high speeds and preventing chip packing in through-holes.

Mechanical integration with power tools is secured through a specially designed shank featuring three ground flats. This tri-flat configuration ensures positive engagement with standard drill chucks, eliminating the risk of the tool spinning or slipping under high-torque loads. The long shank design further aids in accessing recessed areas or navigating deep through-holes. By combining advanced metallurgy with practical design features, the Walter SST Power Tap offers a reliable solution for MRO professionals requiring efficiency and precision.