27 Jun 2014, 11:30

If you look at a cut-away of a ball transfer, you'll see that it's basically a large ball supported by many smaller balls. This is what makes the transfer a low friction omnidirectional bearing, which means, when you include the trackball, the only sizable friction generated is between the larger balls in the transfer unit, and the smaller ones which support it inside the housing. My theory is that the sound is coming from the support balls inside the.



I agree that when they are mounted in a case (they have threaded screws on the bottom of the housing), this should lessen the the loudness dramatically, especially if there is sound dampening in the case as well.



I haven't used the slimblade, but when I do a twist motion with the trackball sitting on three transfer units, the ball spins around it's vertical axis for many revolutions before stopping... basically, there is little resistance to the ball, so I imagine it'll be able to scroll as fast or slow as you want it to.