Another planetary gear box

thingiverse

Create a 11/3 or 3/11 gear box toy prototype as a weekend project or demonstration tool. Made from 6mm MDF, this unique design deviated from the original blueprint by using two 6mm washers on either side of the frame spacers instead of three. Follow the assembly instructions for parts and quantities needed. In the updated version, you'll require one Planet_Spider_1, sixteen Spacer_6mm, one Spacer_3_6mm, two Frame_1, an Internal spur gear_MOD 3-5 42t 20deg, three Gear_MOD 3-5_12t_20deg, one Gear_MOD 3-5_18t_20deg, and a Planet_Spider_3. You'll also need two Drive Boss 18mm dia dowel (length to suit), three 12dia x 20v lg dowels, four M6x45 hex head bolts, superglue, eight M6 washers, and a M6 Penny Washer for the thrust washer. Assemble the input shaft with an 18 tooth gear, Drive boss, and Spacer_3_6mm. Add a penny washer to the face of the gear as a thrust washer. Connect the other drive boss to Planet_Spider_1, add three 12dia x 20 lg dowels to the spider, attach the three 12 tooth gears, and cap off with Planet_Spider_3. Ensure that all gears spin properly. Stack Frame_1, Spacer (twice or two 6mm washers and one spacer), Internal Spur Gear, and another spacer without adding the other frame. Insert one shaft assembly into the frame and add the other shaft. Finally, add the remaining frame and fit bolts without nuts if the wood is a tight fit. Enjoy your 11/3 or 3/11 gear box toy prototype! Scale up using the source files provided, with a module of 3.5 for the gears. If you have any questions, please let us know. Updated version includes photos of the build.