Abstract: A dynamic oil control mechanism for a press including a vacuum inducing ejector or jet-pump to vacuum oil leaking from about an oil seal. The oil seal is located around the drive piston on the press slide to prevent oil migration from the press crown to the die area or slide of the press. A drain port is located about the housing in which the drive piston reciprocates. The ejector maintains a low pressure area within the drain port to pull oil leaking from the seal into the drain port and away from the drive piston. The vacuumed oil is then transferred to an oil reservoir.

Abstract: A dynamic oil control mechanism for a press including a vacuum inducing ejector or jet-pump to vacuum oil leaking from about an oil seal. The oil seal is located around the drive piston on the press slide to prevent oil migration from the press crown to the die area or slide of the press. A drain port is located about the housing in which the drive piston reciprocates. The ejector maintains a low pressure area within the drain port to pull oil leaking from the seal into the drain port and away from the drive piston. The vacuumed oil is then transferred to an oil reservoir.

Abstract: A shutheight adjustment mechanism for a mechanical press including an adjustment screw rotatable to vary shutheight. A pressurized chamber is formed between the adjustment screw and the housing of the adjustment mechanism. Fluid is injected into the chamber to create an oil squeeze-film capable of supporting high impulse working loads and also preload the adjustment screw in the direction of press closure. A rebound damping mechanism is included having a two part takeup nut assembly. Upon actuation of the takeup nut assembly, the two part takeup nut assembly separates to bear on opposite facing thread surfaces of the adjustment screw thereby reducing clearance space and possible changes in shutheight.