Rubber Band Pulley Reduction System for Capacitor Discharge

thingiverse

This is a DIY Rubber Band Pulley Reduction System. I'm sharing it for anyone who wants to build one. I'm using it in a mechanical capacitor discharge system as an alternative to electronic systems. Here's the list of parts I used. I purchased 53mm skateboard wheels from Mini Logo Skateboards, specifically their C-Cut 53mm 101A Black 4pk model. These wheels are perfect for this project. Next, I got Andale Precision Bearings from Amazon, a popular choice among skaters. They're durable and suitable for high-speed applications. You'll need 36 #6-32 x 1/2in bolts from a local hardware store to assemble the system. For the shafts, I used stainless steel 8mm precision shafting from Servocity, specifically the 100mm length which I later cut down to 3.5 inches. I printed this project using Hatchbox Gold PLA and Printrbot Snow White filament on my modified Printrbot Play. The print settings were: .3mm layers, .6mm top and bottom layers, and 1.2mm walls at a speed of 60mm/sec. If you want to upgrade the system to a chain drive, you can use the same housing with #25 chain and sprockets for 8mm rod available from robot shops. When using the relay system, make sure to add a thin metal strip to the end of the print on the electrical relay. This strip should be flexible and pressed by the cam on the skate wheel print. The rubber bands I used are 5x5/8 inches from Uline, but you may need to trim them down to size. Disclaimer: Experiment with this project at your own risk. High-speed spinning parts can cause damage, injury, or even death.