Water Sprinkler (for UK/AU/NZ hose fittings)

thingiverse

This is a remix of the base part from thing:414552, by @falcon20cne. We use different hose fittings here in New Zealand than what @falcon20cne used. I wanted the part to print without any supports. That's the case if printed like shown in the print bed photo. I printed at 200 degrees Celsius in PLA — a version obtained from http://reeltoreal.co.nz that goes from 190 to 220 degrees Celsius. I really love this stuff! My print was tested at the maximum pressure available at home with no leaks. I used a 0.6mm nozzle, 0.2mm layers, 3 top and bottom layers, 2 perimeters, and 40% infill (grid not rectilinear) in Slic3r. A more recent print using a 0.4mm nozzle and Simplify3D seemed to need an X/Y scale reduction of 98 percent for some reason — to fit the thread correctly. I made the screw hole in the base 2.5mm, so an M3x30 stainless steel cap screw fits tightly without lock nuts. PRINTING THREAD FITTENESS IS KEY Overextrusion will ruin the thread fit on this thing, and underextrusion may cause leaks. Printing just the threaded portion to test settings is a good idea, to save time and plastic. If everything fails, try scaling X and Y (only) to 97 or 98 percent. This is my first printed thread. It's our standard hose thread based on British standards, specifically BSP 3/4" 14TPI. I was really amazed at how well the thread turned out (when printed horizontally), and how smoothly the (yellow) hose fitting screws on. The fit can't be any better!