Abstract: A portable friction forge welder that applies a direct rotational load to workpieces via a rotational actuator and a direct axial load to workpieces via an axial actuator, where the rotational actuator and the axial actuator have separate and independent power sources. The portable friction forge welder relies on a stored energy linear axial actuator or a center-hole hydraulic axial actuator to achieve high axial forces and a high torque, low rotational velocity to achieve rotational forces, enabling the welder to achieve higher quality welds using larger diameter workpieces than conventional portable friction welders. By applying a high axial force between workpieces prior to high torque rotation of the workpieces results in improved quality welds. A unique clamping device maintains a fixed positional relationship between the workpieces and includes a unique shroud that enables friction welds under a positive pressure inert atmosphere.