Tube bending devices including a device actuator, a crank assembly, a bending die, and a clamp assembly. The crank assembly is mechanically coupled to the device actuator. The bending die is mechanically coupled to the crank assembly. The clamp assembly is operatively coupled to the bending die and secures the tube to the bending die. The device actuator selectively drives the crank assembly. In some examples, the crank assembly selectively rotates the bending die over at least 180 degrees. In some examples, the bending die includes an axle and the crank assembly includes a first link, a crank actuator, and a second link. The first link is pivotally coupled to the device actuator and coupled to the axle. The crank actuator is pivotally coupled to the first link. The second link is pivotally coupled to the crank actuator and coupled to the axle.

Tube bending devices including a device actuator, a crank assembly, a bending die, and a clamp assembly. The crank assembly is mechanically coupled to the device actuator. The bending die is mechanically coupled to the crank assembly. The clamp assembly is operatively coupled to the bending die and secures the tube to the bending die. The device actuator selectively drives the crank assembly. In some examples, the crank assembly selectively rotates the bending die over at least 180 degrees. In some examples, the bending die includes an axle and the crank assembly includes a first link, a crank actuator, and a second link. The first link is pivotally coupled to the device actuator and coupled to the axle. The crank actuator is pivotally coupled to the first link. The second link is pivotally coupled to the crank actuator and coupled to the axle.

A method and system for manufacturing a hairpin tube. The method includes cutting a coil of tube to provide a plurality of lengths of tubes, and bending each length of tube to form a plurality of hairpin tubes. A lubricant is then atomized with an injector nozzle, and injected into at least one open end of each hairpin tube. After lubricating the hairpin tubes, the legs of each hairpin tube are expanded.