Adding a chuck to the motor/engine of your watercraft can come in handy later. This chuck has a ball bearing water-tight machined mount attached to it, ensuring smooth rotation and a custom fit. This device is a crucial part of my 6 foot submarine drone/ROV.


































I'm building a human powered hydrofil and I'll have to check it the Torque is not too large to use a chuck.
Meanwhile, I have troubles getting my axis water tight. Where can I obtain this "ball bearing water tight mount" or did you make it yourself?