48J704 - Walter Quick-Shank Adaptor - 3/4 Inch Weldon to 1/2-20 UNF

Technical Overview of the Walter Quick-Shank Adaptor

The Walter 48J704 Quick-Shank Adaptor is a precision-engineered accessory designed to bridge the compatibility gap between heavy-duty magnetic drilling units and standard cylindrical twist drills. Specifically manufactured to fit into a standard 3/4-inch Weldon shank arbor—common on most industrial magnetic drills including the Walter ICECUT series—this adaptor provides a male 1/2"-20 UNF thread on the opposing end. This specific thread pitch is the industry standard for mounting 1/2-inch capacity keyed or keyless drill chucks.

Constructed from high-grade hardened steel, the adaptor is built to withstand the high torque and axial loads generated during drilling operations in structural steel and heavy fabrication environments. The concentricity of the machining ensures minimal runout, which is critical for maintaining hole accuracy and preventing premature wear on both the drill bit and the magnetic drill motor bearings. By utilizing this adaptor, operators can transition their magnetic drilling equipment from exclusively using annular cutters to utilizing a vast array of standard jobber or mechanics length twist drills, significantly increasing the utility of the machine on the job site.

Installation is straightforward: the Weldon shank end is inserted into the magnetic drill's arbor and secured with the set screws, just like an annular cutter. A compatible drill chuck (sold separately) is then screwed onto the threaded stud. This simple conversion eliminates the need for carrying a separate portable drill for smaller diameter holes that fall below the range of standard annular cutters.