Early turbine commonality had limits

How interchangeable were the complex parts of early naval turbines?

There was some commonality, but individually cast components meant interchangeability was less complete than navies would have wanted.

Broad machinery commonality did not remove the practical difficulty of making identical complex components in the technology's early years. Blades and related parts were individually cast, limiting the degree of interchangeability that planners could expect. Propulsion technology therefore affected maintenance planning and industrial capacity directly. A shared machinery family did not guarantee a completely interchangeable pool of high-complexity spare parts.