Hinge cylinders are special clamp cylinders characterized by a rod clevis at the end of the piston rod and an articulated fork at the bearing cap. This simplifies installation in clamping apparatus. In addition, the hinge cylinders are particularly suitable for clamping components in the welding process. Clamping forces up to 3016 N are possible. A option with clamping unit can also prevent the piston rod from slipping when depressurized. This ensures that components are securely clamped and held.