Gearbox remix version 2 (with bearings)

thingiverse

This is a 2nd remix of mijael08's awesome gearbox design, showcasing my creative take on this fantastic mechanism. My first remix was a minor edit of a few components, whereas this version takes it to the next level by adding 1/8" ball bearings to the two main gear shafts for even smoother rotation. Of course, steel ball bearings are needed, and I've included a link below so you can purchase them with ease. By sharing both versions available, everyone has options. Here's the link to the bearing I created specifically for this remix: https://www.thingiverse.com/thing:4534272 You'll also want to check out my version 1 remix, which should be used in conjunction with this one: https://www.thingiverse.com/thing:4505687 Now, let's dive into the modifications made in this remix: 1) C001-2 - base - Widened the middle portion of the base for added stability Lowered slightly the shaft for gear C004 to improve performance 2) C006-2 & C047-2 - side panels - Added cutouts for bearings to ensure smooth rotation Revised and enlarged window cutouts for better visibility Enlarged the openings for the shifting rods slightly (C043, C044, C046) Increased separation of the two main gear shafts slightly to loosen gear meshing 3) C007-2 & C019-2 - gear shafts - Changed ends of shaft to a hex to accommodate bearing Can also be used with a LEGO shaft for added versatility 4) C043-2, C044-2, & C046-2 - shifting rods - Shortened slightly to improve performance Increased support in corners for added stability I recommend printing these rods with at least 50% infill for optimal results 5) C055-2 drive gear - Changed gear to hex to accommodate bearing Can also be used with a LEGO shaft for added versatility 6) C004-2 reverse gear - Changed gear to accommodate bearing Check out this video clip of the gearbox in operation: https://youtu.be/c9nSMfGWRfs Get your 1/8-inch Bearing Balls here: https://www.amazon.com/uxcell-8-inch-Bearing-Stainless-Precision/dp/B07YFX3BCT/ref=sr_1_11?crid=2TJTM43RQICQR&dchild=1&keywords=1%2F8+ball+bearings&qid=1594542863&refinements=p_85%3A2470955011&rnid=2941120011&rps=1&s=industrial&sprefix=1%2F8+ball+bearin%2Caps%2C540&sr=1-11 Update 7/12/20: Added C004-2 gear. One last note: the bearing is small enough that it can be embedded in the main gears (see photo of the copper gears with black bearings). Only the gears in the upper shaft need to rotate. However, while the bearing is only about 5mm high, the main gears are about 15mm high. So, in order to keep the gears from wobbling, I embedded two bearings per gear. This might be excessive, so I did not include the STL files for these modified gears. Update 8/20/20: Slightly modified the main drive gear again, C055-3. I found that the gear was pressing tightly against C008, so I shrunk it by 2% while maintaining the same shaft size. It fits better now.