Brio Compatible Builder Series: Fasteners

thingiverse

<h1>Brio Compatible Builder Series:</h1> <h1>Fasteners</h1><br> The marketing team is very clever. Our boys received a BRIO Builder ( 34591 ) Builder Motor Set as a shared Christmas gift. In this kit, you get just enough pieces to be fun for a few minutes, but not nearly enough pieces to really make fun stuff. This is where a few hundred dollars of "spare time equivalent" gets spent in CAD to make more pieces for the kiddos without the cognitive expense of having to go shopping (well .. given the current year, let's be honest .. I am NOT going to any stores for anything but essentials).<br> <br> The components of this kit are dimensionally based on the aforementioned BRIO builder kit and should be completely compatible. Included are some badly needed "upgrades" and customization. This will be a living project series as more components will be added as I dream them up. Be sure to search for: " Brio Compatible Builder Series " to discover the other components!<br> <br> Included are STL files for those who are not yet familiar with <a href="https://github.com/FreeCAD/FreeCAD/blob/master/README.md">FreeCAD</a><br> <hr> <br><h2><b>Fasteners</b><br></h2> bolt length increments of: 15.5mm (8.5mm for nut, 2.3mm for bolt chamfer) plus 5mm for every beam thickness multiplier<br> nut in thicknesses increments of <b>8.5mm</b> (17, 25.5, 34mm) - standard kit size is 8.5mm<br> <code>bolt length = bolt head thickness + nut thickness + (bolt diameter / 4) + (bolt length multiplier x beam thickness)</code><br> <ul> <li>bolt lengths: 13.5, 27, 40.5, 54mm</li> <li>standard bolts</li> <li>double-sided bolts</li> <li>bolts with nut-stops (to serve as axles) with additional (nut stop length of 5.5mm)</li> <li>slotted bolts to fit in beam slots</li> <li>standard washer</li> </ul> <hr> <a href="https://www.thingiverse.com/thing:4713666">The base project contains the FreeCAD file for modifications.</a><br> This project series includes the following component groups:<br> <ul> <li><a href="https://www.thingiverse.com/thing:4720680"><h3>Beams</h3></a></li> <li><a href="https://www.thingiverse.com/thing:4720717"><h3>Drive Wheels and Pulleys</h3></a></li> <li><a href="https://www.thingiverse.com/thing:4716050"><h3>Fasteners</h3></a></li> <li><a href="https://www.thingiverse.com/thing:4716054"><h3>Gears</h3></a></li> </ul><br>I am open to any suggestions as to how to improve the design work-flow in FreeCAD.<br> <br> <b>This design will be the foundation of a completely open source meccano type set. I am seeking collaborators for this project; if there is enough interest, I will draft up a set of "best practices" and establish some engineering criteria (i.e. standardized dimensions, etc).</b><br>