To restore a pressed track caused on the raceway groove (surface) on a slider side to extend the using life, arranging two ceramic rolling elements facing to a steel rolling element placed on an infinite circulating route.
In this linear motion rolling guide unit, an infinite circulation route is constructed with a load raceway track 21 formed by a raceway groove 4 of a track rail 1 and a raceway groove 14 of a slider 2, a directional converter 23 formed by an end cap 11, and a return passage hole 22 formed by a slider 2. A rolling element, circulating along the infinite circulation route is provided with a steel ball 20 and two ceramic balls 27 arranged at a position dividing the infinite circulation route into two almost equal parts. Any one of the ceramic balls 27 runs along the raceway groove 14 of a slider 4 so that the pressed track possible to be caused on the raceway groove 14 can be restored automatically by the running of the steel ball 20.
| JP4685723 | Linear guidance unit |
| JP4454336 | Linear bearing mechanism |
| WO/2000/008344 | CARRIAGE FOR LINEAR GUIDING DEVICE |
SHIMO TAKAHIRO
KATAOKA NORIAKI
