This line shaft unit is part of the Malvern energy transfer apparatus system, designed for demonstrating the conversion of electrical energy to mechanical energy and then to potential energy by winding up a weight on a cord. A 6mm steel shaft is mounted on a stand post with nylon or metal bearings. One end carries an aluminum V-pulley measuring 56mm in diameter, and the other end is fitted with a cord anchoring collar. The overall unit measures 10 x 20 cm.