Lathe headstock and steam locomotive: what they have in common

1. Step 1. Lathe headstock — is part of — Lathe. It rotates the workpiece.
2. Step 2. Lathe — has part — Rope. The bowstring wraps around the workpiece and turns it.
3. Step 3. Rope — is part of — Windlass. A rope.
4. Step 4. Windlass — uses — Crank. The handle of a windlass is a crank.
5. Step 5. Crank — is part of — Steam locomotive. Connecting rods and cranks carry the piston stroke to the wheels.

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