Abstract: Apparatus including a pair of transfer bars, extending horizontally in spaced parallelism, for transporting work through successive processing stations as in a three-dimensional transfer press system for the fabrication of various panel products. The transfer bars are cam operated to move back and forth, up and down, and toward and away from each other, thereby three-dimensionally transferring work. For the up-and-down motion of the transfer bars a lift cam mechanism is coupled via a rack-and-pinion linkage to lift carriers carrying the transfer bars so as to allow them to reciprocate longitudinally and move toward and away from each other. Interposed between the lift cam mechanism and the rack-and-pinion linkage is a height adjustment mechanism providing a variable length of connection therebetween to make it possible to adjust the lowermost position of the transfer bars to the height of the lower press dies in use.