Modjul Skateboard System - Deck, Trucks & Wheels

cults3d

Check out the video here: https://vimeo.com/316969498 The goal of this project is to be able to print a functional skateboard without special materials or printer modifications. Does is work? Yes it does! I am using a Volcano hot end for speed, but it is not necessary. The main part of the deck requires the full build volume of a 300x300x400 printer. There are a few parts required that are not printable: 6903 bearings for the wheels. Bolts for the kingpins. Bolts, washers and nuts for mounting the trucks and connecting the deck parts. See the "Required Parts" section below for details. It is possible to print the smaller parts (trucks and wheels) on a smaller printer and use a conventional wooden deck. It is also possible to print the deck and use conventional trucks and wheels. The trucks are reverse kingpin 50 degree. The hanger is reversible. Hanger width: 140mm. Axle width: 214mm. The intent of the design is for cruising, and not doing tricks which would require stronger filament than the recommended PETG. I haven't tried printing any of the parts with Polycarbonate, Nylon, etc. but I'm curious to hear if you decide to try it out! I recommend using a plastic bonding agent when attaching the tail (e.g Scigrip 16) as there is a lot of strain on the bolt holes without it. The nose is probably fine without being bonded as there is much less stress on it. I've tried a few different TPUs on the wheels: Priline 98a, Sainsmart 95a and eSun 85a. See the results here: https://docs.google.com/spreadsheets/d/1oognSRkHh37sHCIzwKX4GOkM-d9Iz_LIPP12pA2XyIk/edit#gid=0 Please let me know if you try other TPUs and what your results are. I expect Ninjaflex will perform similarly to the eFlex. I've included my source files (Fusion 360) as well as .step and .iges so you can remix freely. Caveat: I'm not a skateboarder or an engineer. Skateboarding is dangerous as flip. Always wear a helmet. Assembly Notes You will need some basic tools to put it all together. Phillips-head screwdriver Pliers Adjustable-end wrench 3/8" combination wrench is helpful (optional) small hammer to tap in the kingpins Trucks I use a pair of channel-lock pliers to tighten the axles in the hangers. It's probably not a bad idea to use a thread-locker to make sure they don't unscrew, but I haven't had an issue with it. I wouldn't recommend glueing them together in case you need to replace a damaged axle. Wheels It can be difficult to get the wheels over the wheel cores. Sometimes standing on it works, otherwise a clamp or vise will do the trick. If you try to print the Soft version of the wheels with a hard TPU, you're going to have a bad time. Once you get it all together check the alignment of the wheels using a straight edge. I've had alignment trouble printing the axles and hangers at other than the recommended orientations, which I believe is solved now. But it's a good idea to check and be sure. Deck The tail needs to be bonded to the main deck with something like Scigrip 16. Bolts alone will cause too much stress and can lead to failure. Use bolts and large washers to clamp while curing. For the nose I'm just using the bolts without issue.