a mechanical press includes a slider which is reciprocated , through connecting rods , by an oscillating plate oscillating around a driving shaft to obtain a press load . the press further includes a swash plate rotatable with the driving shaft . the oscillating plate oscillates in accordance with the rotation of the swash plate . a plurality of lock pins are concentrically disposed in parallel with the driving shaft on a side of the oscillating plate opposite to the swash plate . each of the lock pins has a spherical head housed in the oscillating plate so as to make the pins rotatable and axial movable . a slider guide supports the pins and the slider .