Combat Robot Axel Adapter and Hub

thingiverse

Here is a hub design for ant and beetleweight bots. It uses m3 screws, square nuts, and an m3 12 with a flat head on the top for mounting. I only have a 3 mm axel adapter at the moment, but will make a 4 and 6 in the future (it won't take long, but I have to remember to make it happen). :-) Do NOT print the axel adapter with supports unless you absolutely need to, it will be a lot easier to insert the square nuts if you do not. Also you can use a little dab of hot glue to hold the nut in place. :-) Enjoy