05Z031 - Walter 4-Inch DOC Pilot Pin for 3/4 Weldon Shank Cutters

Precision Alignment and Ejection for Deep Hole Drilling

The Walter 05Z031 Pilot Pin is an essential component engineered for high-performance magnetic drilling operations. Designed specifically to pair with annular cutters featuring a 4-inch depth of cut (DOC) and a standard 3/4-inch Weldon shank, this pin serves two critical functions in the fabrication process: precise centering and reliable slug ejection. In the realm of industrial metalworking, the accuracy of the initial hole placement is paramount. This pilot pin allows operators to align the cutter tip exactly with the center punch mark on the workpiece, ensuring that every hole is drilled according to strict schematic tolerances.

Manufactured from high-grade steel, the 05Z031 is subjected to a rigorous hardening process. This thermal treatment imparts exceptional structural rigidity, preventing the pin from bowing or deforming under the significant axial loads encountered during deep hole drilling. Furthermore, the pin is precision ground to exact diameter tolerances. This smooth, uniform surface finish is crucial for minimizing friction as the pin retracts into the arbor during the cutting cycle. A pin that binds or seizes can interrupt coolant flow—often actuated by the pin's movement—and lead to catastrophic cutter failure due to overheating.

Upon completion of the drilling cycle, the pilot pin performs its second vital role: ejecting the solid metal slug. As the cutter retracts from the workpiece, the spring-loaded mechanism behind the pin drives it forward, forcefully pushing the slug out of the cutter bore. This automated ejection reduces downtime significantly, removing the need for operators to manually pry hot, sharp metal slugs from the tool. For fabrication environments utilizing Walter's ICECUT, SST Core Cut, or Carbide core cutters for deep structural drilling, the 05Z031 Pilot Pin ensures continuous, uninterrupted workflow and maximizes the lifespan of your tooling investments.

By maintaining strict concentricity and offering superior wear resistance, this accessory reduces the likelihood of cutter breakage caused by misalignment. It is an indispensable asset for MRO professionals and structural fabricators who demand reliability in their magnetic drilling equipment.