Parametric Hole Grommet & Snap-in Flush Cover

thingiverse

You want a hole in a panel, desk or bookshelf that looks professional with a hole grommet and flush mount cover? The matching cover can be printed with a catch that seats with a satisfying snap, ensuring it stays put and feels very solid. We use these to dress up holes in coroplast, acrylic, plywood, sheet metal and other paneling so it looks professional and cords or 3D printer filament don't snag. This is the same OpenSCAD code used for object http://www.thingiverse.com/thing:1011192 now revised for a flush or flanged cover. If you don't need a hole, print a cover without! Don't want to download and install OpenSCAD? Make your own with Customizer (on this page). Instructions: Edit the parameters to make the panel grommet as needed. The OpenSCAD code generates parts designed for each other. So that once you set the parameters and then generate each part, the inside, outside and cover will fit together. The customizer and variables in the source are divided into four sections + general: General: Part (cover, inside or outside), Edge type (chamfer or fillet), Cover style (flush or flanged), Cover catch (yes/ no) Panel: Panel thickness (mm), Hole size (mm) Grommet: Grommet (wall) thickness (mm), Note that this is the overall thickness of the grommet wall. The two parts will print half of the stated thickness - mated plus the thread height (normally 2 mm) gives the full thickness Flange width (mm), Flange thickness (mm) Cover: Make hole (yes/ no), Hole size (mm), Plug length, defaults to full plug, make shorter in advanced (mm), Plug wall thickness (mm) Advanced: Normally just go with the defaults but alter at your own risk. Changes here may make unprintable parts. Thread pitch (mm), Thread height to pitch (percent) A 50% setting would give a 2mm thread height on a 4mm pitch Resolution Line segments used to make a circle. Note the higher the number the longer the render will grind making your part Chamfer angle (degrees) Any angle shallower than 45 degrees will probably not print well. Note that a narrow flange and shallow angles will produce unprintable parts Fillet edge area (percent), How much of the flange edge is consumed by the filleting curve. Plug length (percent), How long to make the cover plug Undersize (mm), How much smaller to make the cover plug diameter for a good fit Catch sizing (percent), How big the catch is relation to the undersizing Cover catch offset (mm), How far down in Z-axis to place the catch Try to print at high resolution (both Z-step and circle resolution) but don't go insane. The higher resolutions will make for a better fit and finish. This is the thirteenth revision (v0.9.4) that has implemented the following fixes since the original version: Length of inside part has been lengthened to correct length Countersink on outside part has been removed for better finish Hide exposed threads on outside part by narrowing flange hole to ID Fixed variable name to ensure correct inside part length Added cover and fixed cover hole selection Cosmetic spelling and variable name changes Added inside fillet to improve join between cover plug and cap Added flush cover option Added nudging to ensure cleaner object cuts Renamed the Global section to General to work around Customizer bug The design is (mostly) stable but evolving. Suggest you watch this part as new changes are implemented fairly regularly. Please give feedback so the design can be improved.