A shaft with one or more cams attached to it, especially one operating the valves in an internal combustion engine.
- The combination of a center-mounted spool valve and check valve allow the camshaft's torsional energy to assist actuation, rather than oppose it.
- A timing belt or timing chain links the crankshaft to the camshaft so that the valves are in sync with the pistons.
- This approach is typically used in manufacturing camshafts, crankshafts, valves, pistons - just about any machined part that goes into an automobile engine these days.
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