Abrasive Waterjet

Abrasive waterjet (AWJ) is a CNC-controlled, non-thermal cutting process that uses a very high-pressure water stream mixed with abrasive particles—most commonly garnet—to erode material along a programmed toolpath. Because it cuts cold, it produces no heat-affected zone, making it ideal for heat-sensitive metals, composites, stone, glass, and laminated or finished materials.

In a typical CNC fabrication cell, abrasive waterjet is often the first-operation profile tool. The CAD geometry is translated into a toolpath, and the controller moves the cutting head with kerf compensation, lead-ins, and a pierce sequence suited to the material. This means plate stock, nested sheets, and pre-finished panels can be roughed out to near-net shape without thermal distortion that would pull critical datums out of tolerance. After waterjet profiling, the part moves to a mill or router for finishing bores, mating faces, and other precise features. In architectural and millwork shops, the same machine cuts stone, tile, glass, and engineered laminates with clean edges and no charring or resin smear. Cut quality is governed by traverse speed, pump pressure, abrasive feed rate, nozzle condition, and material thickness, so the operator constantly balances speed against edge finish and taper. Waterjet preserves downstream machining accuracy and minimizes secondary cleanup.