The document provides instructions for building a Tesla turbine using hard drive platters, threaded rod, acrylic or wood casing, and other basic materials. Tesla's bladeless turbine uses adhesion rather than aerodynamics to power itself with steam at up to 95% efficiency. The hard drive platters are layered on a threaded rod and spun, with gas entering between the disks and exiting through holes to turn the assembly. With minor modifications, the design can also be reversed to act as a pump. The turbine is surprisingly simple and efficient but remains underutilized since Tesla did not mass produce it.