A 4-column press (commonly known as a 4-post hydraulic press) is a vertical hydraulic press (up-acting or down-acting) with a guided platen, powered by a hydraulic cylinder(s). The platen is fitted with bronze bushings that ride on four (4) columns of hard chrome-plated alloy steel. Savage 4-Post Hydraulic Presses employ an eight-bushing design, with each bushing pair separated in extra-long housings.
This bushing separation provides a generous bearing ratio, improves platen parallelism, and creates a large lubrication storage area between the bushings. The integration of separated bushings into this design delivers superior guidance in comparison to the competition’s single bushing designs.