Surface Grinding Machines JUNG - Marketplace for used machines UniMachines Surface Grinding Machines JUNG. Add a free ad. Sign in Create a free account JUNG Grinding Machines Germany Rheinland-Pfalz . Surface Grinding Machine JUNG HF 50-RD . Year of manufacture 1971 Minimum.Surface grinding machines Z-SERIES. Preloaded precision linear guideways in the vertical- and cross axis (Bosch Rexroth) for highest accuracy. Scraped and turcite coated slideways in the longitudinal axis provide excellent vibration absorption and a high-quality grinding surface pattern. Maintenance-free paper band filtration unit with up to.