Profile: The Marmac Co. manufactures hydraulic cylinders. We offer products such as stage lifts, high capacity truck levelers, furnace lifts, fork truck service lifts, railroad car lifts and bascule bridges. Our hydraulic installation components include hydraulic power units, electrical controls, mechanical & electrical safety devices, rack & pinion equalizers and a variety of hydraulic cylinders. We produce standard cylinder, which is equipped with automatic air eliminators to bleed air from the cylinder during normal operation. We deliver differential column cylinders with a circular column on which two different diameters are machined and around which a sleeve is fitted.