Laminar flow hose nozzle

thingiverse

This laminar flow hose nozzle features an exit orifice measuring 5 millimeters in diameter, which results in the ejection of a perfectly cylindrical column of water with a corresponding 5-millimeter diameter. To achieve this streamlined flow, the internal bore undergoes a precise series of reductions, shrinking from 20 millimeters to 10 millimeters and ultimately to 5 millimeters at each step, where the transitions are marked by sharp, flat edges (a concept nicely illustrated in Guy Lautard's "The Machinist's Bedside Reader"). When printing this design, I opt for a solid infill of 100%, accompanied by zero perimeter walls, and the omission of both top and bottom layers. To complete the nozzle, I apply a wide brim to the print job and then meticulously ream out the central 5-millimeter section using a 5-millimeter drill bit, thereby imparting a smooth, even finish on the inside surface. By selecting a translucent or "see-thru" filament for printing this hose nozzle, adding light-emitting diodes (LEDs) will result in a colorful stream of water.