Abssac believes it has the world's smallest precision tolerance ball
screw and nut assembly, with a diameter of just 1.8mm and a lead of
0.5mm. Using a ground screw format, the steel ball screw is supplied
complete with journal ends machined to suit standard radial block
bearings. A standard 6mm diameter nut body is used to house the 0.4mm
diameter ball bearings, which are captive within a recirculating ball nut
configuration. Various flange sizes are offered to match the nut to the
application. This new, miniature range of products offers C3-05 accuracy
(0.005mm axial play).