Profile: H D M Hydraulics, LLC assembles single acting, double acting and telescopic hydraulic cylinders for mobile equipment applications. Our product line includes ram, telescopic, screw actuators and integrated valving. We specialize in fabricating small bore, single acting and double acting telescopic cylinders. Our piggyback cylinders are designed to accommodate applications that require additional stroke. Our rephase cylinders are designed to synchronize the extension and retraction of two or more cylinders. Our products are used in truck equipment, construction, turf equipment and marine applications. We are certified with ISO 9001:2000 certification.