For the money this ball is a good value. Buyers will be much happier with the performance if they take it apart and give it a clean up. I did this by taking it apart removing all the oil, taking a file and removing all the sharp edged burs and bumps and putting small chamfer on all the sharp corners. I made a set of 220 and 320 grit sanding sheets for each half of the ball by cutting sheets in half and cutting a hole in the center for the center post to fit through. Put the ball back together ( with the bearing removed) with the sanding sheets in place and turn the halves against the sand paper for a while to smooth out these surfaces. I did this with the 220 and then 320 washed off both halves with solvent (WD40) and blew it all off with compressed air and wiped it down. Applied a thin film of teflon grease resembled the the ball, turned it a bunch to distribute the grease, then took it apart and wiped of all the excess. Reassembly with the bearing and the vise will spin 8 revolutions with one flick of the hand. When I got it it wouldn't make one full turn with the same effort. All in all I'm happy with this tool.
Joyce R. 
