Milwaukee M18 to Ryobi Battery Adapter

thingiverse

I'm excited to share something I've made with all of you. This is a simple adapter that lets you use Milwaukee lithium batteries with your Ryobi tools. The adapter consists of four parts to print, followed by some assembly pieces. Check out this quick YouTube video I put together for the assembly: https://youtu.be/78Nx49VKUew Everything fits tightly together, especially onto the Milwaukee tool, so I might need to adjust the tolerances later. I printed all the parts in ABS, but I'm thinking of trying another one in Nylon 910 to see if it's a bit more slippery for battery insertion and overall more durable. To assemble this adapter, you'll need: (1) A small copper sheet that's 3/32" thick (4) #8 x 3/4" screws (or just use epoxy) (2) 3/8" D x 5/8" L compression springs (2) 1/8" x 1/4" rivets (or small machine screws of your choice) (1) Wire (I used lamp cord) Let me know what you think! If you make this adapter, it's at your own risk. Be extremely careful with the wiring! Some protections that I believe are monitored by other pins in the Milwaukee battery aren't going to work, so just be cautious about how hard you run the tools. Running too low a voltage will damage your cells and disable the under-voltage cutoff.