01U400 - 1-Inch M2 HSS Countersink with Weldon Shank

Precision Countersinking with M2 HSS Durability

The Walter 01U400 is a high-performance 1-inch countersink tool designed to meet the rigorous demands of industrial metalworking. Crafted from premium M2 High-Speed Steel (HSS), this tool is engineered to withstand high temperatures and abrasive wear, ensuring a long service life even when processing tough materials like stainless steel. The tool features a standard 82-degree point angle, making it compatible with the vast majority of flat-head fasteners used in North American fabrication.

One of the standout technical features of this countersink is its variable pitch design. Unlike standard countersinks that often suffer from harmonic vibration and chatter, the irregular spacing of the cutting flutes on this Walter tool disrupts resonant frequencies. This results in a significantly smoother surface finish, reduced noise, and less mechanical stress on the machine spindle. The distinctive tip geometry further aids in centering the tool and initiating the cut cleanly, preventing wandering or gouging of the workpiece.

The inclusion of a Weldon shank is a critical specification for professionals using magnetic drilling units or heavy-duty drill presses. The flat surface on the shank allows set screws to lock the tool firmly in place, preventing slippage under high torque loads—a common issue with standard round shanks. Whether used for creating flush seating for screws, deburring drilled holes, or chamfering edges for safety and aesthetics, the Walter 01U400 delivers consistent, professional results across steel, stainless steel, and non-ferrous alloys.