Pololu Universal Aluminum 6mm Mounting Hubs (4-40)

good product and good price

Used on a motor with a 6mm shaft.

Great Mounting hubs.. I thought the 6mm was going to be bigger or same as 1/4" but i had enough to drill them out..

I come back on my previous comment: it is me who follows me deceived dimensions, the tree that I use is not in 6mm but 1/4 ". This hub is fully compatible with Actobotice 6mm shafts. With the right shaft, this hub fits. Room of good quality.

Overall nice product. Received three longer screws (four have been better), they were great since my D-Shaft groove was deep. Two screws per shaft are great too for the solidity. Don't forget to buy 4-40 screws! If you assemble them on a round shaft, remember to file a flat spot on the shaft. It will be easier to remove the hubs.