... assembly, coining, marking, degating, bending, punching, shearing, staking, crimping, spot welding & clinching. pneumatic machine for cutting This Hydro ... The operating stroke is divided into three stages:1. air-operated approach stroke2. pneumohydraulic powerstroke3. ... on sheet metal joining, punching/piercing, coining/marking/stamping, pressing/compressing/straightening, riveting/crimping/flaring, ...