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The nonrecirculating linear bearings found in both Linear Ball and Rod, and the Cross Roller style tables provide the smoothest translation (least
mechanical noise) of any mechanical bearing table.  The bearing system in the linear ball bearing (ball and rod) style table consists of two rows
of hardened steel balls located on either side of the table. Each row is captured between two sets of ground steel rods (two stationary, two moving) and preloaded to provide ultra smooth, very straight,
extremely low friction motion. The cross roller style functions in a similar manner except the balls are replaced by cylindrical rollers and the rods by ground
"V" groove moves the positioner and is the principal element in determining positional accuracy, repeatability and resolution. ways. The result of this difference is an increased load capacity of two to
three times the equivalent size ball bearing table. The ball bearing tables utilize either leadscrew or ballscrew drive depending on load ratings. Both
tables are limited in travel as a result of the nonrecirculating nature of the bearings |
