Chicago Electric Rotary Tool Battery Pak/Plug Converter

thingiverse

This is a battery-to-wall-socket adapter for the Chicago Electric 9.6v Cordless Rotary Tool from Harbor Freight. With the battery constantly dying mid-project, I wanted to find a way to plug the rotary tool into a wall socket when the battery died without having to buy another tool. So instead of rigging up wires to the connections, I designed this plug pack. Now if the battery dies, I can just pop in the plug pack and keep working with a corded plug instead of waiting hours for the battery to fully charge. Simply glue in some contact points, solder in some wires, and find a 9-9.6v plug you can use. For mine, I soldered the wires to washers, then super-glued them in place, and found a spare 9-volt plug/charger I had lying around to use. This is still a work-in-progress design that will be undergoing changes after testing as I'm still prototyping and need to test how the locking clips will function. For now, I've uploaded a basic version without clips just covers, but the contact points on the tool provide enough pressure to hold the plug in place – not ideal since the cord could pull it out, but it works well for now.