Coin spinner

thingiverse

This is a modified version of the Money Spinner by GeoffB. I had a large number of 20 euro cent coins lying around, and wanted to find a way to use them up since my last trip. Here's a good method to reuse the copper coins you have scattered around. Instead of selecting from a short list of coins, now you need to enter the size of your favorite coin directly. Look it up at Wikipedia, do an online search, or measure it with a caliper. The pre-set size is for 20 euro cent coins. For the center, you must use a 608-sized bearing, i.e., 8 mm × 22 mm × 7 mm. When using euro coins, you can turn your spinner into a symbol of international cooperation. Mine now features coins from France, Greece, Ireland, Italy, Portugal, Slovenia, Austria, Germany, and the Netherlands. The last three are on the inside. Nine coins represent nine countries! I also added bearing caps from Arondite's Fidget Toy Comfort Spinner. You might need to adjust your scale slightly to make the bearing and coins fit, especially if your printer is not calibrated precisely. I had to use 102% scaling. The STL files included are three variants of the spinner: One with three spokes for three 20 euro cent coins. This is the one I printed. Then I wanted it BIG. That can't be made with the customizer, as the coin stacks are higher than the bearing. For that, use 28 20 euro cent coins in seven spokes à four coins. The one printed in red. The last one is for Chinese 1 jiao renminbi coins, three spokes à four mao. Post-Printing To install the coins, a vice comes in handy. Also, one or two coins slightly smaller than the ones you printed the spinner out for (e.g., 10 euro cent coins for a 20 euro cent spinner) are needed. I pressed in the four coins of one arm like this: Press in two coins lightly, one on top and one on the bottom on a table with the palm of your hand. Put the smaller coins on top of these two coins and press in these four coins with the vice. Open the vice; the two small coins fall out. Put in the other two right-sized coins and press them in with the vice. Design files and history can be found at github, in a directory of my 3D printing repository. I had problems with the first version of the €5.60 spinner STL file. I have now updated that; this version prints fine.