Have you seen that? Its some new contraption. What are your thoughts?
I have seen similar but actuated by air and bigger, have seen rollers. I wonder how to suck the chips so the bearing balls could roll. May be blow away constantly the dust. I see a possibility that this could be very useful if the dust is evacuated somehow.
http://www.aliexpress.com/item/Free-...08.4.11.lCkg65
http://www.mycncuk.com/attachment.ph...id=15483&stc=1